Execution of Command Line Tool with Base64 Encoded Arguments

Severity: medium
Entities: ip_addresses
Log types: Crowdstrike.FDREvent
Tags: Execution, Obfuscation
Reference: https://www.crowdstrike.com/blog/blocking-fileless-script-based-attacks-using-falcon-script-control-feature/
Source: github.com/panther-labs/panther-analysis

Detects the execution of common command line tools (e.g., PowerShell, cmd.exe) with Base64 encoded arguments, which could indicate an attempt to obfuscate malicious commands.

MITRE ATT&CK coverage

Tactic	Techniques
Execution	No specific technique

Rule body yaml

AnalysisType: rule
Filename: crowdstrike_base64_encoded_args.py
RuleID: Crowdstrike.Base64EncodedArgs
DisplayName: Execution of Command Line Tool with Base64 Encoded Arguments
Enabled: true
LogTypes:
  - Crowdstrike.FDREvent
Tags:
  - Execution
  - Obfuscation
Severity: Medium
Description: Detects the execution of common command line tools (e.g., PowerShell, cmd.exe) with Base64 encoded arguments, which could indicate an attempt to obfuscate malicious commands.
Runbook: Investigate the endpoint for signs of command line tool execution with Base64 encoded arguments. Review the executed command, decode the Base64 string, and analyze the original content.
Reference: https://www.crowdstrike.com/blog/blocking-fileless-script-based-attacks-using-falcon-script-control-feature/
DedupPeriodMinutes: 60
Tests:
  - Name: Command Line Tool Execution with Base64 Argument (Positive)
    ExpectedResult: true
    Log:
      {
        "ConfigBuild": "1007.3.0016606.11",
        "ConfigStateHash": "3645117824",
        "Entitlements": "15",
        "TreeId": "4295752857",
        "aid": "877761efa8db44d792ddc2redacted",
        "aip": "1.1.1.1",
        "cid": "cfe698690964434083fecdredacted",
        "event":
          {
            "AuthenticationId": "293628",
            "AuthenticodeHashData": "98a4762f52a",
            "CommandLine": "\"C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe\" -EncodedCommand \"aGVsbG93b3JsZA==\" -SomeExtraCommand \"HelloWorld\"",
            "ConfigBuild": "1007.3.0016606.11",
            "ConfigStateHash": "3645117824",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "ImageFileName": "\\Device\\HarddiskVolume2\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
            "ImageSubsystem": "3",
            "IntegrityLevel": "12288",
            "MD5HashData": "c031e215b8b08c752bf362f6d4c5d3ad",
            "ParentAuthenticationId": "293628",
            "ParentBaseFileName": "pwsh.exe",
            "ParentProcessId": "4370948876",
            "ProcessCreateFlags": "1024",
            "ProcessEndTime": "",
            "ProcessParameterFlags": "24577",
            "ProcessStartTime": "1682368414.719",
            "ProcessSxsFlags": "64",
            "RawProcessId": "3120",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "840e1f9dc5a29bebf01626822d7390251e9cf05bb3560ba7b68bdb8a41cf08e3",
            "SessionId": "2",
            "SignInfoFlags": "8683538",
            "SourceProcessId": "4370948876",
            "SourceThreadId": "112532918543",
            "Tags": "25, 27, 40, 151, 874, 924, 12094627905582, 12094627906234, 211106232533012, 263882790666253",
            "TargetProcessId": "10413665481",
            "TokenType": "1",
            "TreeId": "4295752857",
            "UserSid": "S-1-5-21-239183934-720705223-383019856-500",
            "aid": "877761efa8db44d792ddc2redacted",
            "aip": "1.1.1.1",
            "cid": "cfe698690964434083fecdredacted",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
            "name": "ProcessRollup2V19",
            "timestamp": "1682368416719",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
        "name": "ProcessRollup2V19",
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2023-04-24 20:33:36.719",
      }
  - Name: Command Line Tool Execution with Base64 Argument 2 (Positive)
    ExpectedResult: true
    Log:
      {
        "ConfigBuild": "1007.3.0016606.11",
        "ConfigStateHash": "3645117824",
        "Entitlements": "15",
        "TreeId": "4295752857",
        "aid": "877761efa8db44d792ddc2redacted",
        "aip": "1.1.1.1",
        "cid": "cfe698690964434083fecdredacted",
        "event":
          {
            "AuthenticationId": "293628",
            "AuthenticodeHashData": "98a4762f52a",
            "CommandLine": "\"C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe\" -EncodedCommand c29tZXRoaW5n -SomeExtraCommand \"HelloWorld\"",
            "ConfigBuild": "1007.3.0016606.11",
            "ConfigStateHash": "3645117824",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "ImageFileName": "\\Device\\HarddiskVolume2\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
            "ImageSubsystem": "3",
            "IntegrityLevel": "12288",
            "MD5HashData": "c031e215b8b08c752bf362f6d4c5d3ad",
            "ParentAuthenticationId": "293628",
            "ParentBaseFileName": "pwsh.exe",
            "ParentProcessId": "4370948876",
            "ProcessCreateFlags": "1024",
            "ProcessEndTime": "",
            "ProcessParameterFlags": "24577",
            "ProcessStartTime": "1682368414.719",
            "ProcessSxsFlags": "64",
            "RawProcessId": "3120",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "840e1f9dc5a29bebf01626822d7390251e9cf05bb3560ba7b68bdb8a41cf08e3",
            "SessionId": "2",
            "SignInfoFlags": "8683538",
            "SourceProcessId": "4370948876",
            "SourceThreadId": "112532918543",
            "Tags": "25, 27, 40, 151, 874, 924, 12094627905582, 12094627906234, 211106232533012, 263882790666253",
            "TargetProcessId": "10413665481",
            "TokenType": "1",
            "TreeId": "4295752857",
            "UserSid": "S-1-5-21-239183934-720705223-383019856-500",
            "aid": "877761efa8db44d792ddc2redacted",
            "aip": "1.1.1.1",
            "cid": "cfe698690964434083fecdredacted",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
            "name": "ProcessRollup2V19",
            "timestamp": "1682368416719",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
        "name": "ProcessRollup2V19",
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2023-04-24 20:33:36.719",
      }
  - Name: Command Line Tool Execution without Base64 Argument (Negative)
    ExpectedResult: false
    Log:
      {
        "ConfigBuild": "1007.3.0016606.11",
        "ConfigStateHash": "3645117824",
        "Entitlements": "15",
        "TreeId": "4295752857",
        "aid": "877761efa8db44d792ddc2redacted",
        "aip": "1.1.1.1",
        "cid": "cfe698690964434083fecdredacted",
        "event":
          {
            "AuthenticationId": "293628",
            "AuthenticodeHashData": "98a4762f52a",
            "CommandLine": "\"C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe\" -WriteHost \"HelloWorld123\" wget test = good",
            "ConfigBuild": "1007.3.0016606.11",
            "ConfigStateHash": "3645117824",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "ImageFileName": "\\Device\\HarddiskVolume2\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
            "ImageSubsystem": "3",
            "IntegrityLevel": "12288",
            "MD5HashData": "c031e215b8b08c752bf362f6d4c5d3ad",
            "ParentAuthenticationId": "293628",
            "ParentBaseFileName": "pwsh.exe",
            "ParentProcessId": "4370948876",
            "ProcessCreateFlags": "1024",
            "ProcessEndTime": "",
            "ProcessParameterFlags": "24577",
            "ProcessStartTime": "1682368414.719",
            "ProcessSxsFlags": "64",
            "RawProcessId": "3120",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "840e1f9dc5a29bebf01626822d7390251e9cf05bb3560ba7b68bdb8a41cf08e3",
            "SessionId": "2",
            "SignInfoFlags": "8683538",
            "SourceProcessId": "4370948876",
            "SourceThreadId": "112532918543",
            "Tags": "25, 27, 40, 151, 874, 924, 12094627905582, 12094627906234, 211106232533012, 263882790666253",
            "TargetProcessId": "10413665481",
            "TokenType": "1",
            "TreeId": "4295752857",
            "UserSid": "S-1-5-21-239183934-720705223-383019856-500",
            "aid": "877761efa8db44d792ddc2redacted",
            "aip": "1.1.1.1",
            "cid": "cfe698690964434083fecdredacted",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
            "name": "ProcessRollup2V19",
            "timestamp": "1682368416719",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
        "name": "ProcessRollup2V19",
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2023-04-24 20:33:36.719",
      }

  - Name: Mac - Git
    ExpectedResult: false
    Log:
      {
        "ConfigBuild": "1007.4.0016304.11",
        "ConfigStateHash": "3521399940",
        "Entitlements": "15",
        "aid": "1ba46982062b43redacted",
        "aip": "1.1.1.1",
        "cid": "712bcd164963442ea43d5redacted",
        "event":
          {
            "CodeSigningFlags": "570503953",
            "CommandLine": "/Applications/Sourcetree.app/Contents/Resources/git_local/bin/git --no-pager --EncodedString aGVsbG93b3JsZA==",
            "ConfigBuild": "1007.4.0016304.11",
            "ConfigStateHash": "3521399940",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "GID": "20",
            "ImageFileName": "/Applications/Sourcetree.app/Contents/Resources/git_local/bin/git",
            "MD5HashData": "redacted",
            "MachOSubType": "1",
            "ParentBaseFileName": "Sourcetree",
            "ParentProcessId": "466750419375415990",
            "ProcessEndTime": "",
            "ProcessGroupId": "468193711305251738",
            "ProcessStartTime": "1675441378.504",
            "RGID": "501",
            "RUID": "501",
            "RawProcessId": "30138",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "f154d8e18001e2fb7ae36d1eca1e833ddac057dd946fbb76ee14121a5e293538",
            "SVGID": "20",
            "SVUID": "501",
            "SessionProcessId": "466750413792797092",
            "SigningId": "git",
            "SourceProcessId": "466750419375415990",
            "SourceThreadId": "0",
            "Tags": "12094627905582, 12094627906234",
            "TargetProcessId": "468193711305251738",
            "UID": "501",
            "aid": "1ba46982062b43redacted",
            "aip": "1.1.1.1",
            "cid": "712bcd164963442ea43d5redacted",
            "event_platform": "Mac",
            "event_simpleName": "ProcessRollup2",
            "id": "21fd2f8b-de5f-4ab0-b188-4bbb8c80224d",
            "name": "ProcessRollup2MacV7",
            "timestamp": "1675441380830",
          },
        "event_platform": "Mac",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "21fd2f8b-de5f-4ab0-b188-4bbb8c80224d",
        "name": "ProcessRollup2MacV7",
        "p_any_ip_addresses": ["1.1.1.1"],
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2023-02-03 16:23:00.83",
      }
  - Name: Command Line Tool Execution without Base64 Argument (Negative) 2
    ExpectedResult: false
    Log:
      {
        "ConfigBuild": "1007.3.0016606.11",
        "ConfigStateHash": "3645117824",
        "Entitlements": "15",
        "TreeId": "4295752857",
        "aid": "877761efa8db44d792ddc2redacted",
        "aip": "1.1.1.1",
        "cid": "cfe698690964434083fecdredacted",
        "event":
          {
            "AuthenticationId": "293628",
            "AuthenticodeHashData": "98a4762f52a",
            "CommandLine": "/c powercfg /requests",
            "ConfigBuild": "1007.3.0016606.11",
            "ConfigStateHash": "3645117824",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "ImageFileName": "\\Device\\HarddiskVolume2\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
            "ImageSubsystem": "3",
            "IntegrityLevel": "12288",
            "MD5HashData": "c031e215b8b08c752bf362f6d4c5d3ad",
            "ParentAuthenticationId": "293628",
            "ParentBaseFileName": "pwsh.exe",
            "ParentProcessId": "4370948876",
            "ProcessCreateFlags": "1024",
            "ProcessEndTime": "",
            "ProcessParameterFlags": "24577",
            "ProcessStartTime": "1682368414.719",
            "ProcessSxsFlags": "64",
            "RawProcessId": "3120",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "840e1f9dc5a29bebf01626822d7390251e9cf05bb3560ba7b68bdb8a41cf08e3",
            "SessionId": "2",
            "SignInfoFlags": "8683538",
            "SourceProcessId": "4370948876",
            "SourceThreadId": "112532918543",
            "Tags": "25, 27, 40, 151, 874, 924, 12094627905582, 12094627906234, 211106232533012, 263882790666253",
            "TargetProcessId": "10413665481",
            "TokenType": "1",
            "TreeId": "4295752857",
            "UserSid": "S-1-5-21-239183934-720705223-383019856-500",
            "aid": "877761efa8db44d792ddc2redacted",
            "aip": "1.1.1.1",
            "cid": "cfe698690964434083fecdredacted",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
            "name": "ProcessRollup2V19",
            "timestamp": "1682368416719",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
        "name": "ProcessRollup2V19",
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2023-04-24 20:33:36.719",
      }
  - Name: Command Line Tool Execution without Base64 Argument (Negative) 3
    ExpectedResult: false
    Log:
      {
        "ConfigBuild": "1007.3.0016606.11",
        "ConfigStateHash": "3645117824",
        "Entitlements": "15",
        "TreeId": "4295752857",
        "aid": "877761efa8db44d792ddc2redacted",
        "aip": "1.1.1.1",
        "cid": "cfe698690964434083fecdredacted",
        "event":
          {
            "AuthenticationId": "293628",
            "AuthenticodeHashData": "98a4762f52a",
            "CommandLine": "powershell.exe  -c D:\\Atlas\\Scripts\\CopyBakToS3Job.ps1",
            "ConfigBuild": "1007.3.0016606.11",
            "ConfigStateHash": "3645117824",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "ImageFileName": "\\Device\\HarddiskVolume2\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
            "ImageSubsystem": "3",
            "IntegrityLevel": "12288",
            "MD5HashData": "c031e215b8b08c752bf362f6d4c5d3ad",
            "ParentAuthenticationId": "293628",
            "ParentBaseFileName": "pwsh.exe",
            "ParentProcessId": "4370948876",
            "ProcessCreateFlags": "1024",
            "ProcessEndTime": "",
            "ProcessParameterFlags": "24577",
            "ProcessStartTime": "1682368414.719",
            "ProcessSxsFlags": "64",
            "RawProcessId": "3120",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "840e1f9dc5a29bebf01626822d7390251e9cf05bb3560ba7b68bdb8a41cf08e3",
            "SessionId": "2",
            "SignInfoFlags": "8683538",
            "SourceProcessId": "4370948876",
            "SourceThreadId": "112532918543",
            "Tags": "25, 27, 40, 151, 874, 924, 12094627905582, 12094627906234, 211106232533012, 263882790666253",
            "TargetProcessId": "10413665481",
            "TokenType": "1",
            "TreeId": "4295752857",
            "UserSid": "S-1-5-21-239183934-720705223-383019856-500",
            "aid": "877761efa8db44d792ddc2redacted",
            "aip": "1.1.1.1",
            "cid": "cfe698690964434083fecdredacted",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
            "name": "ProcessRollup2V19",
            "timestamp": "1682368416719",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
        "name": "ProcessRollup2V19",
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2023-04-24 20:33:36.719",
      }
  - Name: Command Line Tool Execution without Base64 Argument (Negative) 4
    ExpectedResult: false
    Log:
      {
        "ConfigBuild": "1007.3.0016606.11",
        "ConfigStateHash": "3645117824",
        "Entitlements": "15",
        "TreeId": "4295752857",
        "aid": "877761efa8db44d792ddc2redacted",
        "aip": "1.1.1.1",
        "cid": "cfe698690964434083fecdredacted",
        "event":
          {
            "AuthenticationId": "293628",
            "AuthenticodeHashData": "98a4762f52a",
            "CommandLine": "Powershell.exe  -NonInteractive -NoProfile -ExecutionPolicy Bypass -NoLogo -File C:\\opt\\sensu\\plugins\\check-windows-disk.ps1 90 95",
            "ConfigBuild": "1007.3.0016606.11",
            "ConfigStateHash": "3645117824",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "ImageFileName": "\\Device\\HarddiskVolume2\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
            "ImageSubsystem": "3",
            "IntegrityLevel": "12288",
            "MD5HashData": "c031e215b8b08c752bf362f6d4c5d3ad",
            "ParentAuthenticationId": "293628",
            "ParentBaseFileName": "pwsh.exe",
            "ParentProcessId": "4370948876",
            "ProcessCreateFlags": "1024",
            "ProcessEndTime": "",
            "ProcessParameterFlags": "24577",
            "ProcessStartTime": "1682368414.719",
            "ProcessSxsFlags": "64",
            "RawProcessId": "3120",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "840e1f9dc5a29bebf01626822d7390251e9cf05bb3560ba7b68bdb8a41cf08e3",
            "SessionId": "2",
            "SignInfoFlags": "8683538",
            "SourceProcessId": "4370948876",
            "SourceThreadId": "112532918543",
            "Tags": "25, 27, 40, 151, 874, 924, 12094627905582, 12094627906234, 211106232533012, 263882790666253",
            "TargetProcessId": "10413665481",
            "TokenType": "1",
            "TreeId": "4295752857",
            "UserSid": "S-1-5-21-239183934-720705223-383019856-500",
            "aid": "877761efa8db44d792ddc2redacted",
            "aip": "1.1.1.1",
            "cid": "cfe698690964434083fecdredacted",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
            "name": "ProcessRollup2V19",
            "timestamp": "1682368416719",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
        "name": "ProcessRollup2V19",
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2023-04-24 20:33:36.719",
      }
  - Name: Command Line Tool Execution without Base64 Argument (Negative) 5
    ExpectedResult: false
    Log:
      {
        "ConfigBuild": "1007.3.0016606.11",
        "ConfigStateHash": "3645117824",
        "Entitlements": "15",
        "TreeId": "4295752857",
        "aid": "877761efa8db44d792ddc2redacted",
        "aip": "1.1.1.1",
        "cid": "cfe698690964434083fecdredacted",
        "event":
          {
            "AuthenticationId": "293628",
            "AuthenticodeHashData": "98a4762f52a",
            "CommandLine": "C:\\windows\\system32\\cmd.exe  /S /D /c\" ECHO F\"",
            "ConfigBuild": "1007.3.0016606.11",
            "ConfigStateHash": "3645117824",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "ImageFileName": "\\Device\\HarddiskVolume2\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
            "ImageSubsystem": "3",
            "IntegrityLevel": "12288",
            "MD5HashData": "c031e215b8b08c752bf362f6d4c5d3ad",
            "ParentAuthenticationId": "293628",
            "ParentBaseFileName": "pwsh.exe",
            "ParentProcessId": "4370948876",
            "ProcessCreateFlags": "1024",
            "ProcessEndTime": "",
            "ProcessParameterFlags": "24577",
            "ProcessStartTime": "1682368414.719",
            "ProcessSxsFlags": "64",
            "RawProcessId": "3120",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "840e1f9dc5a29bebf01626822d7390251e9cf05bb3560ba7b68bdb8a41cf08e3",
            "SessionId": "2",
            "SignInfoFlags": "8683538",
            "SourceProcessId": "4370948876",
            "SourceThreadId": "112532918543",
            "Tags": "25, 27, 40, 151, 874, 924, 12094627905582, 12094627906234, 211106232533012, 263882790666253",
            "TargetProcessId": "10413665481",
            "TokenType": "1",
            "TreeId": "4295752857",
            "UserSid": "S-1-5-21-239183934-720705223-383019856-500",
            "aid": "877761efa8db44d792ddc2redacted",
            "aip": "1.1.1.1",
            "cid": "cfe698690964434083fecdredacted",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
            "name": "ProcessRollup2V19",
            "timestamp": "1682368416719",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
        "name": "ProcessRollup2V19",
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2023-04-24 20:33:36.719",
      }
  - Name: Command Line Tool Execution without Base64 Argument (Negative) 6
    ExpectedResult: false
    Log:
      {
        "ConfigBuild": "1007.3.0016606.11",
        "ConfigStateHash": "3645117824",
        "Entitlements": "15",
        "TreeId": "4295752857",
        "aid": "877761efa8db44d792ddc2redacted",
        "aip": "1.1.1.1",
        "cid": "cfe698690964434083fecdredacted",
        "event":
          {
            "AuthenticationId": "293628",
            "AuthenticodeHashData": "98a4762f52a",
            "CommandLine": '"C:\Windows\system32\cmd.exe" /Q /C ""C:\Program Files (x86)\Google\GoogleUpdater\128.0.6537.0\uninstall.cmd" --dir="C:\Program Files (x86)\Google\GoogleUpdater\128.0.6537.0""',
            "ConfigBuild": "1007.3.0016606.11",
            "ConfigStateHash": "3645117824",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "ImageFileName": "\\Device\\HarddiskVolume2\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
            "ImageSubsystem": "3",
            "IntegrityLevel": "12288",
            "MD5HashData": "c031e215b8b08c752bf362f6d4c5d3ad",
            "ParentAuthenticationId": "293628",
            "ParentBaseFileName": "pwsh.exe",
            "ParentProcessId": "4370948876",
            "ProcessCreateFlags": "1024",
            "ProcessEndTime": "",
            "ProcessParameterFlags": "24577",
            "ProcessStartTime": "1682368414.719",
            "ProcessSxsFlags": "64",
            "RawProcessId": "3120",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "840e1f9dc5a29bebf01626822d7390251e9cf05bb3560ba7b68bdb8a41cf08e3",
            "SessionId": "2",
            "SignInfoFlags": "8683538",
            "SourceProcessId": "4370948876",
            "SourceThreadId": "112532918543",
            "Tags": "25, 27, 40, 151, 874, 924, 12094627905582, 12094627906234, 211106232533012, 263882790666253",
            "TargetProcessId": "10413665481",
            "TokenType": "1",
            "TreeId": "4295752857",
            "UserSid": "S-1-5-21-239183934-720705223-383019856-500",
            "aid": "877761efa8db44d792ddc2redacted",
            "aip": "1.1.1.1",
            "cid": "cfe698690964434083fecdredacted",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
            "name": "ProcessRollup2V19",
            "timestamp": "1682368416719",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
        "name": "ProcessRollup2V19",
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2023-04-24 20:33:36.719",
      }
  - Name: Command Line Tool Execution without Base64 Argument (Negative) 7
    ExpectedResult: false
    Log:
      {
        "ConfigBuild": "1007.3.0016606.11",
        "ConfigStateHash": "3645117824",
        "Entitlements": "15",
        "TreeId": "4295752857",
        "aid": "877761efa8db44d792ddc2redacted",
        "aip": "1.1.1.1",
        "cid": "cfe698690964434083fecdredacted",
        "event":
          {
            "AuthenticationId": "293628",
            "AuthenticodeHashData": "98a4762f52a",
            "CommandLine": 'cmd /c "node -v"',
            "ConfigBuild": "1007.3.0016606.11",
            "ConfigStateHash": "3645117824",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "ImageFileName": "\\Device\\HarddiskVolume2\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
            "ImageSubsystem": "3",
            "IntegrityLevel": "12288",
            "MD5HashData": "c031e215b8b08c752bf362f6d4c5d3ad",
            "ParentAuthenticationId": "293628",
            "ParentBaseFileName": "pwsh.exe",
            "ParentProcessId": "4370948876",
            "ProcessCreateFlags": "1024",
            "ProcessEndTime": "",
            "ProcessParameterFlags": "24577",
            "ProcessStartTime": "1682368414.719",
            "ProcessSxsFlags": "64",
            "RawProcessId": "3120",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "840e1f9dc5a29bebf01626822d7390251e9cf05bb3560ba7b68bdb8a41cf08e3",
            "SessionId": "2",
            "SignInfoFlags": "8683538",
            "SourceProcessId": "4370948876",
            "SourceThreadId": "112532918543",
            "Tags": "25, 27, 40, 151, 874, 924, 12094627905582, 12094627906234, 211106232533012, 263882790666253",
            "TargetProcessId": "10413665481",
            "TokenType": "1",
            "TreeId": "4295752857",
            "UserSid": "S-1-5-21-239183934-720705223-383019856-500",
            "aid": "877761efa8db44d792ddc2redacted",
            "aip": "1.1.1.1",
            "cid": "cfe698690964434083fecdredacted",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
            "name": "ProcessRollup2V19",
            "timestamp": "1682368416719",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
        "name": "ProcessRollup2V19",
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2023-04-24 20:33:36.719",
      }
  - Name: base64 quoted argument
    ExpectedResult: true
    Log:
      {
        "ConfigBuild": "1007.3.0016606.11",
        "ConfigStateHash": "3645117824",
        "Entitlements": "15",
        "TreeId": "4295752857",
        "aid": "877761efa8db44d792ddc2redacted",
        "aip": "1.1.1.1",
        "cid": "cfe698690964434083fecdredacted",
        "event":
          {
            "AuthenticationId": "293628",
            "AuthenticodeHashData": "98a4762f52a",
            "CommandLine": '/usr/bin/somebinary --b64="aGVsbG8taXMtaXQtbWUteW91cmUtbG9va2luZy1mb3IK"',
            "ConfigBuild": "1007.3.0016606.11",
            "ConfigStateHash": "3645117824",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "ImageFileName": "\\Device\\HarddiskVolume2\\Windows\\System32\\cmd.exe",
            "ImageSubsystem": "3",
            "IntegrityLevel": "12288",
            "MD5HashData": "c031e215b8b08c752bf362f6d4c5d3ad",
            "ParentAuthenticationId": "293628",
            "ParentBaseFileName": "pwsh.exe",
            "ParentProcessId": "4370948876",
            "ProcessCreateFlags": "1024",
            "ProcessEndTime": "",
            "ProcessParameterFlags": "24577",
            "ProcessStartTime": "1682368414.719",
            "ProcessSxsFlags": "64",
            "RawProcessId": "3120",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "840e1f9dc5a29bebf01626822d7390251e9cf05bb3560ba7b68bdb8a41cf08e3",
            "SessionId": "2",
            "SignInfoFlags": "8683538",
            "SourceProcessId": "4370948876",
            "SourceThreadId": "112532918543",
            "Tags": "25, 27, 40, 151, 874, 924, 12094627905582, 12094627906234, 211106232533012, 263882790666253",
            "TargetProcessId": "10413665481",
            "TokenType": "1",
            "TreeId": "4295752857",
            "UserSid": "S-1-5-21-239183934-720705223-383019856-500",
            "aid": "877761efa8db44d792ddc2redacted",
            "aip": "1.1.1.1",
            "cid": "cfe698690964434083fecdredacted",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
            "name": "ProcessRollup2V19",
            "timestamp": "1682368416719",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
        "name": "ProcessRollup2V19",
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2023-04-24 20:33:36.719",
      }
  - Name: base64 prefixed argument
    ExpectedResult: true
    Log:
      {
        "ConfigBuild": "1007.3.0016606.11",
        "ConfigStateHash": "3645117824",
        "Entitlements": "15",
        "TreeId": "4295752857",
        "aid": "877761efa8db44d792ddc2redacted",
        "aip": "1.1.1.1",
        "cid": "cfe698690964434083fecdredacted",
        "event":
          {
            "AuthenticationId": "293628",
            "AuthenticodeHashData": "98a4762f52a",
            "CommandLine": '/usr/bin/somebinary --b64=aGVsbG8taXMtaXQtbWUteW91cmUtbG9va2luZy1mb3==',
            "ConfigBuild": "1007.3.0016606.11",
            "ConfigStateHash": "3645117824",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "ImageFileName": "\\Device\\HarddiskVolume2\\Windows\\System32\\cmd.exe",
            "ImageSubsystem": "3",
            "IntegrityLevel": "12288",
            "MD5HashData": "c031e215b8b08c752bf362f6d4c5d3ad",
            "ParentAuthenticationId": "293628",
            "ParentBaseFileName": "pwsh.exe",
            "ParentProcessId": "4370948876",
            "ProcessCreateFlags": "1024",
            "ProcessEndTime": "",
            "ProcessParameterFlags": "24577",
            "ProcessStartTime": "1682368414.719",
            "ProcessSxsFlags": "64",
            "RawProcessId": "3120",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "840e1f9dc5a29bebf01626822d7390251e9cf05bb3560ba7b68bdb8a41cf08e3",
            "SessionId": "2",
            "SignInfoFlags": "8683538",
            "SourceProcessId": "4370948876",
            "SourceThreadId": "112532918543",
            "Tags": "25, 27, 40, 151, 874, 924, 12094627905582, 12094627906234, 211106232533012, 263882790666253",
            "TargetProcessId": "10413665481",
            "TokenType": "1",
            "TreeId": "4295752857",
            "UserSid": "S-1-5-21-239183934-720705223-383019856-500",
            "aid": "877761efa8db44d792ddc2redacted",
            "aip": "1.1.1.1",
            "cid": "cfe698690964434083fecdredacted",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
            "name": "ProcessRollup2V19",
            "timestamp": "1682368416719",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
        "name": "ProcessRollup2V19",
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2023-04-24 20:33:36.719",
      }
  - Name: no image name
    ExpectedResult: false
    Log:
      {
        "ConfigBuild": "1007.3.0016606.11",
        "ConfigStateHash": "3645117824",
        "Entitlements": "15",
        "TreeId": "4295752857",
        "aid": "877761efa8db44d792ddc2redacted",
        "aip": "1.1.1.1",
        "cid": "cfe698690964434083fecdredacted",
        "event":
          {
            "AuthenticationId": "293628",
            "AuthenticodeHashData": "98a4762f52a",
            "CommandLine": '/usr/bin/somebinary --b64=aGVsbG8taXMtaXQtbWUteW91cmUtbG9va2luZy1mb3==',
            "ConfigBuild": "1007.3.0016606.11",
            "ConfigStateHash": "3645117824",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "ImageSubsystem": "3",
            "IntegrityLevel": "12288",
            "MD5HashData": "c031e215b8b08c752bf362f6d4c5d3ad",
            "ParentAuthenticationId": "293628",
            "ParentBaseFileName": "pwsh.exe",
            "ParentProcessId": "4370948876",
            "ProcessCreateFlags": "1024",
            "ProcessEndTime": "",
            "ProcessParameterFlags": "24577",
            "ProcessStartTime": "1682368414.719",
            "ProcessSxsFlags": "64",
            "RawProcessId": "3120",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "840e1f9dc5a29bebf01626822d7390251e9cf05bb3560ba7b68bdb8a41cf08e3",
            "SessionId": "2",
            "SignInfoFlags": "8683538",
            "SourceProcessId": "4370948876",
            "SourceThreadId": "112532918543",
            "Tags": "25, 27, 40, 151, 874, 924, 12094627905582, 12094627906234, 211106232533012, 263882790666253",
            "TargetProcessId": "10413665481",
            "TokenType": "1",
            "TreeId": "4295752857",
            "UserSid": "S-1-5-21-239183934-720705223-383019856-500",
            "aid": "877761efa8db44d792ddc2redacted",
            "aip": "1.1.1.1",
            "cid": "cfe698690964434083fecdredacted",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
            "name": "ProcessRollup2V19",
            "timestamp": "1682368416719",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
        "name": "ProcessRollup2V19",
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2023-04-24 20:33:36.719",
      }
  - Name: Command Line Tool Execution with Base64 Argument (Positive) - Non-ASCII char
    ExpectedResult: true
    Log:
      {
          "ConfigBuild": "1007.3.0016606.11",
          "ConfigStateHash": "3645117824",
          "Entitlements": "15",
          "TreeId": "4295752857",
          "aid": "877761efa8db44d792ddc2redacted",
          "aip": "1.1.1.1",
          "cid": "cfe698690964434083fecdredacted",
          "event":
            {
                "AuthenticationId": "293628",
                "AuthenticodeHashData": "98a4762f52a",
                "CommandLine": "powershell.exe -NoProfile -NonInteractive –ExecutionPolicy Bypass -EncodedCommand UwB0AGEAcgB0ACAAIgBoAHQAdABwADoALwAvAGwAbwBjAGEAbABoAG8AcwB0ADoANgAwADAANgAvACIA",
                "ConfigBuild": "1007.3.0016606.11",
                "ConfigStateHash": "3645117824",
                "EffectiveTransmissionClass": "2",
                "Entitlements": "15",
                "ImageFileName": "\\Device\\HarddiskVolume2\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
                "ImageSubsystem": "3",
                "IntegrityLevel": "12288",
                "MD5HashData": "00000000004a672949fdd139d7ab1994",
                "ParentAuthenticationId": "293628",
                "ParentBaseFileName": "pwsh.exe",
                "ParentProcessId": "4370948876",
                "ProcessCreateFlags": "1024",
                "ProcessEndTime": "",
                "ProcessParameterFlags": "24577",
                "ProcessStartTime": "1682368414.719",
                "ProcessSxsFlags": "64",
                "RawProcessId": "3120",
                "SHA1HashData": "0000000000000000000000000000000000000000",
                "SHA256HashData": "00000000006d378c65c9f4a8b3cfd909ecc89da96bc6cdb3e3aced7e1cce251c",
                "SessionId": "2",
                "SignInfoFlags": "8683538",
                "SourceProcessId": "4370948876",
                "SourceThreadId": "111111111111",
                "Tags": "25, 27, 40, 151, 874, 924, 12094627905582, 12094627906234, 211106232533012, 263882790666253",
                "TargetProcessId": "10413665481",
                "TokenType": "1",
                "TreeId": "4295752857",
                "UserSid": "S-1-5-21-239183934-720705223-383019856-500",
                "aid": "877761efa8db44d792ddc2redacted",
                "aip": "1.1.1.1",
                "cid": "cfe698690964434083fecdredacted",
                "event_platform": "Win",
                "event_simpleName": "ProcessRollup2",
                "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
                "name": "ProcessRollup2V19",
                "timestamp": "1682368416719",
            },
          "event_platform": "Win",
          "event_simpleName": "ProcessRollup2",
          "fdr_event_type": "ProcessRollup2",
          "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
          "name": "ProcessRollup2V19",
          "p_log_type": "Crowdstrike.FDREvent",
          "timestamp": "2023-04-24 20:33:36.719",
      }
  - Name: Command Line Tool Execution with Portuguese non-ASCII characters (Positive)
    ExpectedResult: true
    Log:
      {
        "ConfigBuild": "1007.3.0016606.11",
        "ConfigStateHash": "3645117824",
        "Entitlements": "15",
        "TreeId": "4295752857",
        "aid": "877761efa8db44d792ddc2redacted",
        "aip": "1.1.1.1",
        "cid": "cfe698690964434083fecdredacted",
        "event":
          {
            "AuthenticationId": "293628",
            "AuthenticodeHashData": "98a4762f52a",
            "CommandLine": "PowerShell.exe -NoProfile -ExecutionPolicy Bypass -File \"C:\\Program Files\\Program\\policies\\logon.ps1\" -NOTICETEXTSTRING \"Já conferiu as atualizações hoje?\" -NOTICECAPTIONSTRING Atualização -EncodedCommand c29tZXRoaW5n",
            "ConfigBuild": "1007.3.0016606.11",
            "ConfigStateHash": "3645117824",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "ImageFileName": "\\Device\\HarddiskVolume2\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
            "ImageSubsystem": "3",
            "IntegrityLevel": "12288",
            "MD5HashData": "0000000000e664180df54a59ceaa976d",
            "ParentAuthenticationId": "293628",
            "ParentBaseFileName": "pwsh.exe",
            "ParentProcessId": "4370948876",
            "ProcessCreateFlags": "1024",
            "ProcessEndTime": "",
            "ProcessParameterFlags": "24577",
            "ProcessStartTime": "1682368414.719",
            "ProcessSxsFlags": "64",
            "RawProcessId": "3120",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "0000000000df01c3b8a21a5684c9f16fbc1b97049676c43262cc31c73f910da1",
            "SessionId": "2",
            "SignInfoFlags": "8683538",
            "SourceProcessId": "4370948876",
            "SourceThreadId": "111111111111",
            "Tags": "25, 27, 40, 151, 874, 924, 12094627905582, 12094627906234, 211106232533012, 263882790666253",
            "TargetProcessId": "10413665481",
            "TokenType": "1",
            "TreeId": "4295752857",
            "UserSid": "S-1-5-21-239183934-720705223-383019856-500",
            "aid": "877761efa8db44d792ddc2redacted",
            "aip": "1.1.1.1",
            "cid": "cfe698690964434083fecdredacted",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
            "name": "ProcessRollup2V19",
            "timestamp": "1682368416719",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
        "name": "ProcessRollup2V19",
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2023-04-24 20:33:36.719",
      }
  - Name: Windows Centennial App - NewUpdatesReadyToApply (Negative - False Positive Fix)
    ExpectedResult: false
    Log:
      {
        "ConfigBuild": "1007.3.0016606.11",
        "ConfigStateHash": "3645117824",
        "Entitlements": "15",
        "TreeId": "4295752857",
        "aid": "72821324f4394cb18366154f95efeefc",
        "aip": "1.1.1.1",
        "cid": "cfe698690964434083fecdredacted",
        "event":
          {
            "AuthenticationId": "293628",
            "AuthenticodeHashData": "98a4762f52a",
            "CommandLine": "powershell.exe  -Command start 'dcu.centennial: Create NewUpdatesReadyToApply'",
            "ConfigBuild": "1007.3.0016606.11",
            "ConfigStateHash": "3645117824",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "ImageFileName": "\\Device\\HarddiskVolume3\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
            "ImageSubsystem": "3",
            "IntegrityLevel": "12288",
            "MD5HashData": "c031e215b8b08c752bf362f6d4c5d3ad",
            "ParentAuthenticationId": "293628",
            "ParentBaseFileName": "cmd.exe",
            "ParentProcessId": "1170961674455",
            "ProcessCreateFlags": "1024",
            "ProcessEndTime": "",
            "ProcessParameterFlags": "24577",
            "ProcessStartTime": "1682368414.719",
            "ProcessSxsFlags": "64",
            "RawProcessId": "17584",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "0ff6f2c94bc7e2833a5f7e16de1622e5dba70396f31c7d5f56381870317e8c46",
            "SessionId": "2",
            "SignInfoFlags": "8683538",
            "SourceProcessId": "4370948876",
            "SourceThreadId": "112532918543",
            "Tags": "25, 27, 40, 151, 874, 924, 12094627905582, 12094627906234, 211106232533012, 263882790666253",
            "TargetProcessId": "1170964331829",
            "TokenType": "1",
            "TreeId": "4295752857",
            "UserSid": "S-1-5-21-239183934-720705223-383019856-500",
            "aid": "72821324f4394cb18366154f95efeefc",
            "aip": "1.1.1.1",
            "cid": "cfe698690964434083fecdredacted",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
            "name": "ProcessRollup2V19",
            "timestamp": "1682368416719",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
        "name": "ProcessRollup2V19",
        "p_log_type": "Crowdstrike.FDREvent",
        "platform": "Win",
        "timestamp": "2023-04-24 20:33:36.719",
      }
  - Name: PowerShell UTF-16LE Encoded Command - Get-ItemProperty (Positive)
    ExpectedResult: true
    Log:
      {
        "ConfigBuild": "1007.3.0016606.11",
        "ConfigStateHash": "3645117824",
        "Entitlements": "15",
        "TreeId": "4295752857",
        "aid": "877761efa8db44d792ddc2redacted",
        "aip": "1.1.1.1",
        "cid": "cfe698690964434083fecdredacted",
        "event":
          {
            "AuthenticationId": "293628",
            "AuthenticodeHashData": "98a4762f52a",
            "CommandLine": "powershell.exe -NoProfile -EncodedCommand KABHAGUAdAAtAEkAdABlAG0AUAByAG8AcABlAHIAdAB5ACAALQBQAGEAdABoACAASABLAEwATQA6AFwAUwBZAFMAVABFAE0AXABDAHUAcgByAGUAbgB0AEMAbwBuAHQAcgBvAGwAUwBlAHQAXABDAG8AbgB0AHIAbwBsAFwAVABpAG0AZQBaAG8AbgBlAEkAbgBmAG8AcgBtAGEAdABpAG8AbgAgAC0ATgBhAG0AZQAgAFIAZQBhAGwAVABpAG0AZQBJAHMAVQBuAGkAdgBlAHIAcwBhAGwAKQAuAFIAZQBhAGwAVABpAG0AZQBJAHMAVQBuAGkAdgBlAHIAcwBhAGwA",
            "ConfigBuild": "1007.3.0016606.11",
            "ConfigStateHash": "3645117824",
            "EffectiveTransmissionClass": "2",
            "Entitlements": "15",
            "ImageFileName": "\\Device\\HarddiskVolume2\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
            "ImageSubsystem": "3",
            "IntegrityLevel": "12288",
            "MD5HashData": "c031e215b8b08c752bf362f6d4c5d3ad",
            "ParentAuthenticationId": "293628",
            "ParentBaseFileName": "python.exe",
            "ParentProcessId": "4370948876",
            "ProcessCreateFlags": "1024",
            "ProcessEndTime": "",
            "ProcessParameterFlags": "24577",
            "ProcessStartTime": "1682368414.719",
            "ProcessSxsFlags": "64",
            "RawProcessId": "3120",
            "SHA1HashData": "0000000000000000000000000000000000000000",
            "SHA256HashData": "840e1f9dc5a29bebf01626822d7390251e9cf05bb3560ba7b68bdb8a41cf08e3",
            "SessionId": "2",
            "SignInfoFlags": "8683538",
            "SourceProcessId": "4370948876",
            "SourceThreadId": "112532918543",
            "Tags": "25, 27, 40, 151, 874, 924, 12094627905582, 12094627906234, 211106232533012, 263882790666253",
            "TargetProcessId": "10413665481",
            "TokenType": "1",
            "TreeId": "4295752857",
            "UserSid": "S-1-5-21-239183934-720705223-383019856-500",
            "aid": "877761efa8db44d792ddc2redacted",
            "aip": "1.1.1.1",
            "cid": "cfe698690964434083fecdredacted",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
            "name": "ProcessRollup2V19",
            "timestamp": "1682368416719",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "id": "b0c07877-f288-49f8-8cb3-150149a557b2",
        "name": "ProcessRollup2V19",
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2023-04-24 20:33:36.719",
      }
  - Name: PowerShell -Command with plain English args - no encoding flag (Negative)
    ExpectedResult: false
    Log:
      {
        "aid": "2c1d1b0b1e324c5894399c8b870994d4",
        "aip": "46.17.161.146",
        "cid": "e4a46c2a445744f7860dcf62bf1b6ad4",
        "event":
          {
            "CommandLine": "\"powershell.exe\" -ExecutionPolicy Bypass -NoProfile -Command \\\"1-GPUpdate -Name 'Require user authentication for remote connections by using Network Level Authentication' -Force\\\"",
            "ImageFileName": "\\Device\\HarddiskVolume3\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
            "ParentBaseFileName": "ThreatLockerService.exe",
            "UserSid": "S-1-5-18",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "name": "ProcessRollup2V19",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2026-02-24 16:38:26.949000000",
      }
  - Name: PowerShell -enc abbreviated flag (Positive)
    ExpectedResult: true
    Log:
      {
        "aid": "877761efa8db44d792ddc2redacted",
        "aip": "1.1.1.1",
        "cid": "cfe698690964434083fecdredacted",
        "event":
          {
            "CommandLine": "powershell.exe -NoProfile -enc aGVsbG93b3JsZA==",
            "ImageFileName": "\\Device\\HarddiskVolume2\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
            "ParentBaseFileName": "cmd.exe",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "name": "ProcessRollup2V19",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2023-04-24 20:33:36.719",
      }
  - Name: PowerShell -e abbreviated flag (Positive)
    ExpectedResult: true
    Log:
      {
        "aid": "877761efa8db44d792ddc2redacted",
        "aip": "1.1.1.1",
        "cid": "cfe698690964434083fecdredacted",
        "event":
          {
            "CommandLine": "powershell.exe -NoProfile -e aGVsbG93b3JsZA==",
            "ImageFileName": "\\Device\\HarddiskVolume2\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe",
            "ParentBaseFileName": "cmd.exe",
            "event_platform": "Win",
            "event_simpleName": "ProcessRollup2",
            "name": "ProcessRollup2V19",
          },
        "event_platform": "Win",
        "event_simpleName": "ProcessRollup2",
        "fdr_event_type": "ProcessRollup2",
        "p_log_type": "Crowdstrike.FDREvent",
        "timestamp": "2023-04-24 20:33:36.719",
      }

Detection logic

Condition

process_name is_not_null
fdr_event_type eq "ProcessRollup2"
event_platform eq "Win"
process_name in ["powershell.exe", "cmd.exe", "cscript.exe", "wscript.exe", "rundll32.exe"]

This rule also runs imperative logic the parser cannot express as a filter; the conditions above are the structured part it could extract.

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

Field	Kind	Values
`event_platform`	eq	`Win` corpus 7 (panther 7)
`fdr_event_type`	eq	`ProcessRollup2` corpus 10 (panther 10)
`process_name`	in	`cmd.exe` corpus 77 (elastic 48, splunk 29) `cscript.exe` corpus 25 (elastic 23, splunk 2) `powershell.exe` corpus 104 (elastic 60, splunk 44) `rundll32.exe` corpus 60 (elastic 34, splunk 26) `wscript.exe` corpus 29 (elastic 28, splunk 1)
`process_name`	is_not_null	(no value, null check)

Output fields

Fields the rule emits when it matches. Chronicle authors list these in the outcome block; they appear on the detection and $risk_score drives alerting. Sentinel / Defender XDR rules build them up through project / summarize / extend stages. Sentinel maps these into alert fields via entityMappings and customDetails; Defender XDR custom detections surface them as alert fields directly.

Field	Source
`aid`
`CommandLine`
`TargetProcessId`
`RawProcessId`
`ParentBaseFileName`
`ParentProcessId`
`ImageFileName`
`SHA256Hash`	`SHA256HashData`
`platform`	`event_platform`

`j` / `k`	Scroll down / up
`d` / `u`	Half-page down / up
`gg` / `G`	Top / bottom
`h` / `l`	History back / forward
`f`	Follow link (`Shift` = new tab)
`/`	Focus search
`?`	Toggle this help
`↑` / `↓`	Navigate search results
`Enter`	Open highlighted result
`Esc`	Close results / dialog

`type:`	`events` / `rules` / `providers`
`vendor:`	`sigma` / `elastic` / `splunk` / `kusto` / `chronicle` (vendor name alone also works: `sigma:`, `kql:`, `secops:`…)
`tactic:`	TA-id, slug, or name: `credential_access`, `TA0006`
`technique:`	technique or sub-technique ID: `T1003`, `T1003.001` (alias `tech:`)
`severity:`	`critical` / `high` / `medium` / `low` / `informational` (alias `sev:`)
`risk_score`	Numeric comparison on the Elastic risk score (0 to 100): `risk_score>50`, `risk_score<=20`, `risk_score=99` (alias `risk`; Elastic rules only)
`stages:`	Rules with exactly N pipeline stages
`correlation:`	`single_event` / `sequence` / `alternatives` / `alternatives_cross_log` / `all_required` / `correlated`
`with:`	Co-occurrence event-id; stacks (`with:4624 with:4769`) to require all, while a comma list in one occurrence (`with:4624,4769`) is an either-or group. Implies multi-event
`like:`	Structural neighbors of a rule slug (equivalents + subsumption stricter / broader): `like:comsvcs_lsass_memory_dump-splunk-sysmon`
`groupby:`	Entity-grouping substring match against `group_by_keys`: `groupby:user`, `groupby:host`
`uses:`	Rules whose predicate tree touches the field (any kind, any value): `uses:CommandLine`
`excludes:`	Rules with top-level `not()` clauses on the field (FP whitelists): `excludes:ParentImage`
`field:` / `value:`	Predicate search; narrows rule cards to those with a matching leaf and drives the indicator tier. Unquoted = substring, wildcards allowed (`value:mimikatz`)
`indicator:`	Shorthand for `field:F value:V`: `indicator:Image=*\powershell.exe`
`kind:`	Filter by predicate kind. Narrows rule cards to those carrying a matching predicate leaf (`vendor:elastic kind:cidr_match`) and drives the indicator tier: `contains` / `starts_with` / `ends_with` / `regex` / `cidr` / `eq` / `in` … (operator aliases `op:`/`match:`)
`has:` / `no:`	`sample`, `field`, `notes`, `refs`, `trace`, `thirdparty`, `rule`, `pattern`, `timewindow`, `threshold`, `newterms`, `sigma`/`elastic`/`splunk`/`kusto`/`chronicle`
`-op:val`	Exclude matches; works on most operators but not `type:`/`like:`/`has:`/`no:` (use `no:<flag>` to exclude a rule flag): `tactic:execution -vendor:splunk`. Standalone `-kind:`/`-field:`/`-value:` drop every rule carrying a matching predicate leaf (`type:rules -kind:is_null`)
`field:"…"` / `value:"…"`	Quoted value = anchored exact match (also allows spaces): `value:"net user"`
`a,b`	Comma = OR inside one operator (`vendor:sigma,elastic`, `severity:high,critical`); repeating a facet merges the same way. `field:`/`value:` never split (literal commas)
`vendors:` / `stage:`	Singular and plural spellings fold to the canonical operator and value: `tactics:` = `tactic:`, `type:event` = `type:events`, `correlation:sequences` = `correlation:sequence`, `has:thresholds` = `has:threshold`
`"quoted phrase"`	Exact-match a multi-word phrase (free text)