Net WebClient Casing Anomalies

Status: test
Severity: high
Log source: product windows, category process_creation
Author: Florian Roth (Nextron Systems)
Source: github.com/SigmaHQ/sigma

Detects PowerShell command line contents that include a suspicious abnormal casing in the Net.Webclient (e.g. nEt.WEbCliEnT) string as used in obfuscation techniques

MITRE ATT&CK coverage

Tactic	Techniques
Execution	`T1059.001` Command and Scripting Interpreter: PowerShell

Event coverage

Provider	Event	Title
Sysmon	Event ID 1	Process creation

Rule body yaml

title: Net WebClient Casing Anomalies
id: c86133ad-4725-4bd0-8170-210788e0a7ba
status: test
description: Detects PowerShell command line contents that include a suspicious abnormal casing in the Net.Webclient (e.g. nEt.WEbCliEnT) string as used in obfuscation techniques
references:
    - https://app.any.run/tasks/b9040c63-c140-479b-ad59-f1bb56ce7a97/
author: Florian Roth (Nextron Systems)
date: 2022-05-24
modified: 2023-01-05
tags:
    - attack.execution
    - attack.t1059.001
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith:
              - '\powershell.exe'
              - '\pwsh.exe'
        - OriginalFileName:
              - 'PowerShell.EXE'
              - 'pwsh.dll'
    selection_encoded:
        CommandLine|contains:
            - 'TgBlAFQALgB3AEUAQg'
            - '4AZQBUAC4AdwBFAEIA'
            - 'OAGUAVAAuAHcARQBCA'
            - 'bgBFAHQALgB3AGUAYg'
            - '4ARQB0AC4AdwBlAGIA'
            - 'uAEUAdAAuAHcAZQBiA'
            - 'TgBFAHQALgB3AGUAYg'
            - 'OAEUAdAAuAHcAZQBiA'
            - 'bgBlAFQALgB3AGUAYg'
            - '4AZQBUAC4AdwBlAGIA'
            - 'uAGUAVAAuAHcAZQBiA'
            - 'TgBlAFQALgB3AGUAYg'
            - 'OAGUAVAAuAHcAZQBiA'
            - 'bgBFAFQALgB3AGUAYg'
            - '4ARQBUAC4AdwBlAGIA'
            - 'uAEUAVAAuAHcAZQBiA'
            - 'bgBlAHQALgBXAGUAYg'
            - '4AZQB0AC4AVwBlAGIA'
            - 'uAGUAdAAuAFcAZQBiA'
            - 'bgBFAHQALgBXAGUAYg'
            - '4ARQB0AC4AVwBlAGIA'
            - 'uAEUAdAAuAFcAZQBiA'
            - 'TgBFAHQALgBXAGUAYg'
            - 'OAEUAdAAuAFcAZQBiA'
            - 'bgBlAFQALgBXAGUAYg'
            - '4AZQBUAC4AVwBlAGIA'
            - 'uAGUAVAAuAFcAZQBiA'
            - 'TgBlAFQALgBXAGUAYg'
            - 'OAGUAVAAuAFcAZQBiA'
            - 'bgBFAFQALgBXAGUAYg'
            - '4ARQBUAC4AVwBlAGIA'
            - 'uAEUAVAAuAFcAZQBiA'
            - 'bgBlAHQALgB3AEUAYg'
            - '4AZQB0AC4AdwBFAGIA'
            - 'uAGUAdAAuAHcARQBiA'
            - 'TgBlAHQALgB3AEUAYg'
            - 'OAGUAdAAuAHcARQBiA'
            - 'bgBFAHQALgB3AEUAYg'
            - '4ARQB0AC4AdwBFAGIA'
            - 'uAEUAdAAuAHcARQBiA'
            - 'TgBFAHQALgB3AEUAYg'
            - 'OAEUAdAAuAHcARQBiA'
            - 'bgBlAFQALgB3AEUAYg'
            - '4AZQBUAC4AdwBFAGIA'
            - 'uAGUAVAAuAHcARQBiA'
            - 'TgBlAFQALgB3AEUAYg'
            - 'OAGUAVAAuAHcARQBiA'
            - 'bgBFAFQALgB3AEUAYg'
            - '4ARQBUAC4AdwBFAGIA'
            - 'uAEUAVAAuAHcARQBiA'
            - 'TgBFAFQALgB3AEUAYg'
            - 'OAEUAVAAuAHcARQBiA'
            - 'bgBlAHQALgBXAEUAYg'
            - '4AZQB0AC4AVwBFAGIA'
            - 'uAGUAdAAuAFcARQBiA'
            - 'TgBlAHQALgBXAEUAYg'
            - 'OAGUAdAAuAFcARQBiA'
            - 'bgBFAHQALgBXAEUAYg'
            - '4ARQB0AC4AVwBFAGIA'
            - 'uAEUAdAAuAFcARQBiA'
            - 'TgBFAHQALgBXAEUAYg'
            - 'OAEUAdAAuAFcARQBiA'
            - 'bgBlAFQALgBXAEUAYg'
            - '4AZQBUAC4AVwBFAGIA'
            - 'uAGUAVAAuAFcARQBiA'
            - 'TgBlAFQALgBXAEUAYg'
            - 'OAGUAVAAuAFcARQBiA'
            - 'bgBFAFQALgBXAEUAYg'
            - '4ARQBUAC4AVwBFAGIA'
            - 'uAEUAVAAuAFcARQBiA'
            - 'TgBFAFQALgBXAEUAYg'
            - 'OAEUAVAAuAFcARQBiA'
            - 'bgBlAHQALgB3AGUAQg'
            - '4AZQB0AC4AdwBlAEIA'
            - 'uAGUAdAAuAHcAZQBCA'
            - 'TgBlAHQALgB3AGUAQg'
            - 'OAGUAdAAuAHcAZQBCA'
            - 'bgBFAHQALgB3AGUAQg'
            - '4ARQB0AC4AdwBlAEIA'
            - 'uAEUAdAAuAHcAZQBCA'
            - 'TgBFAHQALgB3AGUAQg'
            - 'OAEUAdAAuAHcAZQBCA'
            - 'bgBlAFQALgB3AGUAQg'
            - '4AZQBUAC4AdwBlAEIA'
            - 'uAGUAVAAuAHcAZQBCA'
            - 'TgBlAFQALgB3AGUAQg'
            - 'OAGUAVAAuAHcAZQBCA'
            - 'bgBFAFQALgB3AGUAQg'
            - '4ARQBUAC4AdwBlAEIA'
            - 'uAEUAVAAuAHcAZQBCA'
            - 'TgBFAFQALgB3AGUAQg'
            - 'OAEUAVAAuAHcAZQBCA'
            - 'bgBlAHQALgBXAGUAQg'
            - '4AZQB0AC4AVwBlAEIA'
            - 'uAGUAdAAuAFcAZQBCA'
            - 'TgBlAHQALgBXAGUAQg'
            - 'OAGUAdAAuAFcAZQBCA'
            - 'bgBFAHQALgBXAGUAQg'
            - '4ARQB0AC4AVwBlAEIA'
            - 'uAEUAdAAuAFcAZQBCA'
            - 'TgBFAHQALgBXAGUAQg'
            - 'OAEUAdAAuAFcAZQBCA'
            - 'bgBlAFQALgBXAGUAQg'
            - '4AZQBUAC4AVwBlAEIA'
            - 'uAGUAVAAuAFcAZQBCA'
            - 'TgBlAFQALgBXAGUAQg'
            - 'OAGUAVAAuAFcAZQBCA'
            - 'bgBFAFQALgBXAGUAQg'
            - '4ARQBUAC4AVwBlAEIA'
            - 'uAEUAVAAuAFcAZQBCA'
            - 'TgBFAFQALgBXAGUAQg'
            - 'OAEUAVAAuAFcAZQBCA'
            - 'bgBlAHQALgB3AEUAQg'
            - '4AZQB0AC4AdwBFAEIA'
            - 'uAGUAdAAuAHcARQBCA'
            - 'TgBlAHQALgB3AEUAQg'
            - 'OAGUAdAAuAHcARQBCA'
            - 'bgBFAHQALgB3AEUAQg'
            - '4ARQB0AC4AdwBFAEIA'
            - 'uAEUAdAAuAHcARQBCA'
            - 'TgBFAHQALgB3AEUAQg'
            - 'OAEUAdAAuAHcARQBCA'
            - 'bgBlAFQALgB3AEUAQg'
            - 'uAGUAVAAuAHcARQBCA'
            - 'bgBFAFQALgB3AEUAQg'
            - '4ARQBUAC4AdwBFAEIA'
            - 'uAEUAVAAuAHcARQBCA'
            - 'TgBFAFQALgB3AEUAQg'
            - 'OAEUAVAAuAHcARQBCA'
            - 'TgBlAHQALgBXAEUAQg'
            - '4AZQB0AC4AVwBFAEIA'
            - 'OAGUAdAAuAFcARQBCA'
            - 'bgBFAHQALgBXAEUAQg'
            - '4ARQB0AC4AVwBFAEIA'
            - 'uAEUAdAAuAFcARQBCA'
            - 'TgBFAHQALgBXAEUAQg'
            - 'OAEUAdAAuAFcARQBCA'
            - 'bgBlAFQALgBXAEUAQg'
            - '4AZQBUAC4AVwBFAEIA'
            - 'uAGUAVAAuAFcARQBCA'
            - 'TgBlAFQALgBXAEUAQg'
            - 'OAGUAVAAuAFcARQBCA'
            - 'bgBFAFQALgBXAEUAQg'
            - '4ARQBUAC4AVwBFAEIA'
            - 'uAEUAVAAuAFcARQBCA'
    condition: all of selection_*
falsepositives:
    - Unknown
level: high

Stages and Predicates

Stage 0: `condition`

all of selection_*

Stage 1: `selection_img`

selection_img:
    - Image|endswith:
          - '\powershell.exe'
          - '\pwsh.exe'
    - OriginalFileName:
          - 'PowerShell.EXE'
          - 'pwsh.dll'

Stage 2: `selection_encoded`

selection_encoded:
    CommandLine|contains:
        - 'TgBlAFQALgB3AEUAQg'
        - '4AZQBUAC4AdwBFAEIA'
        - 'OAGUAVAAuAHcARQBCA'
        - 'bgBFAHQALgB3AGUAYg'
        - '4ARQB0AC4AdwBlAGIA'
        - 'uAEUAdAAuAHcAZQBiA'
        - 'TgBFAHQALgB3AGUAYg'
        - 'OAEUAdAAuAHcAZQBiA'
        - 'bgBlAFQALgB3AGUAYg'
        - '4AZQBUAC4AdwBlAGIA'
        - 'uAGUAVAAuAHcAZQBiA'
        - 'TgBlAFQALgB3AGUAYg'
        - 'OAGUAVAAuAHcAZQBiA'
        - 'bgBFAFQALgB3AGUAYg'
        - '4ARQBUAC4AdwBlAGIA'
        - 'uAEUAVAAuAHcAZQBiA'
        - 'bgBlAHQALgBXAGUAYg'
        - '4AZQB0AC4AVwBlAGIA'
        - 'uAGUAdAAuAFcAZQBiA'
        - 'bgBFAHQALgBXAGUAYg'
        - '4ARQB0AC4AVwBlAGIA'
        - 'uAEUAdAAuAFcAZQBiA'
        - 'TgBFAHQALgBXAGUAYg'
        - 'OAEUAdAAuAFcAZQBiA'
        - 'bgBlAFQALgBXAGUAYg'
        - '4AZQBUAC4AVwBlAGIA'
        - 'uAGUAVAAuAFcAZQBiA'
        - 'TgBlAFQALgBXAGUAYg'
        - 'OAGUAVAAuAFcAZQBiA'
        - 'bgBFAFQALgBXAGUAYg'
        - '4ARQBUAC4AVwBlAGIA'
        - 'uAEUAVAAuAFcAZQBiA'
        - 'bgBlAHQALgB3AEUAYg'
        - '4AZQB0AC4AdwBFAGIA'
        - 'uAGUAdAAuAHcARQBiA'
        - 'TgBlAHQALgB3AEUAYg'
        - 'OAGUAdAAuAHcARQBiA'
        - 'bgBFAHQALgB3AEUAYg'
        - '4ARQB0AC4AdwBFAGIA'
        - 'uAEUAdAAuAHcARQBiA'
        - 'TgBFAHQALgB3AEUAYg'
        - 'OAEUAdAAuAHcARQBiA'
        - 'bgBlAFQALgB3AEUAYg'
        - '4AZQBUAC4AdwBFAGIA'
        - 'uAGUAVAAuAHcARQBiA'
        - 'TgBlAFQALgB3AEUAYg'
        - 'OAGUAVAAuAHcARQBiA'
        - 'bgBFAFQALgB3AEUAYg'
        - '4ARQBUAC4AdwBFAGIA'
        - 'uAEUAVAAuAHcARQBiA'
        - 'TgBFAFQALgB3AEUAYg'
        - 'OAEUAVAAuAHcARQBiA'
        - 'bgBlAHQALgBXAEUAYg'
        - '4AZQB0AC4AVwBFAGIA'
        - 'uAGUAdAAuAFcARQBiA'
        - 'TgBlAHQALgBXAEUAYg'
        - 'OAGUAdAAuAFcARQBiA'
        - 'bgBFAHQALgBXAEUAYg'
        - '4ARQB0AC4AVwBFAGIA'
        - 'uAEUAdAAuAFcARQBiA'
        - 'TgBFAHQALgBXAEUAYg'
        - 'OAEUAdAAuAFcARQBiA'
        - 'bgBlAFQALgBXAEUAYg'
        - '4AZQBUAC4AVwBFAGIA'
        - 'uAGUAVAAuAFcARQBiA'
        - 'TgBlAFQALgBXAEUAYg'
        - 'OAGUAVAAuAFcARQBiA'
        - 'bgBFAFQALgBXAEUAYg'
        - '4ARQBUAC4AVwBFAGIA'
        - 'uAEUAVAAuAFcARQBiA'
        - 'TgBFAFQALgBXAEUAYg'
        - 'OAEUAVAAuAFcARQBiA'
        - 'bgBlAHQALgB3AGUAQg'
        - '4AZQB0AC4AdwBlAEIA'
        - 'uAGUAdAAuAHcAZQBCA'
        - 'TgBlAHQALgB3AGUAQg'
        - 'OAGUAdAAuAHcAZQBCA'
        - 'bgBFAHQALgB3AGUAQg'
        - '4ARQB0AC4AdwBlAEIA'
        - 'uAEUAdAAuAHcAZQBCA'
        - 'TgBFAHQALgB3AGUAQg'
        - 'OAEUAdAAuAHcAZQBCA'
        - 'bgBlAFQALgB3AGUAQg'
        - '4AZQBUAC4AdwBlAEIA'
        - 'uAGUAVAAuAHcAZQBCA'
        - 'TgBlAFQALgB3AGUAQg'
        - 'OAGUAVAAuAHcAZQBCA'
        - 'bgBFAFQALgB3AGUAQg'
        - '4ARQBUAC4AdwBlAEIA'
        - 'uAEUAVAAuAHcAZQBCA'
        - 'TgBFAFQALgB3AGUAQg'
        - 'OAEUAVAAuAHcAZQBCA'
        - 'bgBlAHQALgBXAGUAQg'
        - '4AZQB0AC4AVwBlAEIA'
        - 'uAGUAdAAuAFcAZQBCA'
        - 'TgBlAHQALgBXAGUAQg'
        - 'OAGUAdAAuAFcAZQBCA'
        - 'bgBFAHQALgBXAGUAQg'
        - '4ARQB0AC4AVwBlAEIA'
        - 'uAEUAdAAuAFcAZQBCA'
        - 'TgBFAHQALgBXAGUAQg'
        - 'OAEUAdAAuAFcAZQBCA'
        - 'bgBlAFQALgBXAGUAQg'
        - '4AZQBUAC4AVwBlAEIA'
        - 'uAGUAVAAuAFcAZQBCA'
        - 'TgBlAFQALgBXAGUAQg'
        - 'OAGUAVAAuAFcAZQBCA'
        - 'bgBFAFQALgBXAGUAQg'
        - '4ARQBUAC4AVwBlAEIA'
        - 'uAEUAVAAuAFcAZQBCA'
        - 'TgBFAFQALgBXAGUAQg'
        - 'OAEUAVAAuAFcAZQBCA'
        - 'bgBlAHQALgB3AEUAQg'
        - '4AZQB0AC4AdwBFAEIA'
        - 'uAGUAdAAuAHcARQBCA'
        - 'TgBlAHQALgB3AEUAQg'
        - 'OAGUAdAAuAHcARQBCA'
        - 'bgBFAHQALgB3AEUAQg'
        - '4ARQB0AC4AdwBFAEIA'
        - 'uAEUAdAAuAHcARQBCA'
        - 'TgBFAHQALgB3AEUAQg'
        - 'OAEUAdAAuAHcARQBCA'
        - 'bgBlAFQALgB3AEUAQg'
        - 'uAGUAVAAuAHcARQBCA'
        - 'bgBFAFQALgB3AEUAQg'
        - '4ARQBUAC4AdwBFAEIA'
        - 'uAEUAVAAuAHcARQBCA'
        - 'TgBFAFQALgB3AEUAQg'
        - 'OAEUAVAAuAHcARQBCA'
        - 'TgBlAHQALgBXAEUAQg'
        - '4AZQB0AC4AVwBFAEIA'
        - 'OAGUAdAAuAFcARQBCA'
        - 'bgBFAHQALgBXAEUAQg'
        - '4ARQB0AC4AVwBFAEIA'
        - 'uAEUAdAAuAFcARQBCA'
        - 'TgBFAHQALgBXAEUAQg'
        - 'OAEUAdAAuAFcARQBCA'
        - 'bgBlAFQALgBXAEUAQg'
        - '4AZQBUAC4AVwBFAEIA'
        - 'uAGUAVAAuAFcARQBCA'
        - 'TgBlAFQALgBXAEUAQg'
        - 'OAGUAVAAuAFcARQBCA'
        - 'bgBFAFQALgBXAEUAQg'
        - '4ARQBUAC4AVwBFAEIA'
        - 'uAEUAVAAuAFcARQBCA'

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
`CommandLine`	match	`4ARQB0AC4AVwBFAEIA` `4ARQB0AC4AVwBFAGIA` `4ARQB0AC4AVwBlAEIA` `4ARQB0AC4AVwBlAGIA` `4ARQB0AC4AdwBFAEIA` `4ARQB0AC4AdwBFAGIA` `4ARQB0AC4AdwBlAEIA` `4ARQB0AC4AdwBlAGIA` `4ARQBUAC4AVwBFAEIA` `4ARQBUAC4AVwBFAGIA` `4ARQBUAC4AVwBlAEIA` `4ARQBUAC4AVwBlAGIA` `4ARQBUAC4AdwBFAEIA` `4ARQBUAC4AdwBFAGIA` `4ARQBUAC4AdwBlAEIA` `4ARQBUAC4AdwBlAGIA` `4AZQB0AC4AVwBFAEIA` `4AZQB0AC4AVwBFAGIA` `4AZQB0AC4AVwBlAEIA` `4AZQB0AC4AVwBlAGIA` `4AZQB0AC4AdwBFAEIA` `4AZQB0AC4AdwBFAGIA` `4AZQB0AC4AdwBlAEIA` `4AZQBUAC4AVwBFAEIA` `4AZQBUAC4AVwBFAGIA` `4AZQBUAC4AVwBlAEIA` `4AZQBUAC4AVwBlAGIA` `4AZQBUAC4AdwBFAEIA` `4AZQBUAC4AdwBFAGIA` `4AZQBUAC4AdwBlAEIA` `4AZQBUAC4AdwBlAGIA` `OAEUAVAAuAFcARQBiA` `OAEUAVAAuAFcAZQBCA` `OAEUAVAAuAHcARQBCA` `OAEUAVAAuAHcARQBiA` `OAEUAVAAuAHcAZQBCA` `OAEUAdAAuAFcARQBCA` `OAEUAdAAuAFcARQBiA` `OAEUAdAAuAFcAZQBCA` `OAEUAdAAuAFcAZQBiA` `OAEUAdAAuAHcARQBCA` `OAEUAdAAuAHcARQBiA` `OAEUAdAAuAHcAZQBCA` `OAEUAdAAuAHcAZQBiA` `OAGUAVAAuAFcARQBCA` `OAGUAVAAuAFcARQBiA` `OAGUAVAAuAFcAZQBCA` `OAGUAVAAuAFcAZQBiA` `OAGUAVAAuAHcARQBCA` `OAGUAVAAuAHcARQBiA` `OAGUAVAAuAHcAZQBCA` `OAGUAVAAuAHcAZQBiA` `OAGUAdAAuAFcARQBCA` `OAGUAdAAuAFcARQBiA` `OAGUAdAAuAFcAZQBCA` `OAGUAdAAuAHcARQBCA` `OAGUAdAAuAHcARQBiA` `OAGUAdAAuAHcAZQBCA` `TgBFAFQALgB3AEUAQg` `TgBFAFQALgB3AEUAYg` `TgBFAFQALgB3AGUAQg` `TgBFAFQALgBXAEUAYg` `TgBFAFQALgBXAGUAQg` `TgBFAHQALgB3AEUAQg` `TgBFAHQALgB3AEUAYg` `TgBFAHQALgB3AGUAQg` `TgBFAHQALgB3AGUAYg` `TgBFAHQALgBXAEUAQg` `TgBFAHQALgBXAEUAYg` `TgBFAHQALgBXAGUAQg` `TgBFAHQALgBXAGUAYg` `TgBlAFQALgB3AEUAQg` `TgBlAFQALgB3AEUAYg` `TgBlAFQALgB3AGUAQg` `TgBlAFQALgB3AGUAYg` `TgBlAFQALgBXAEUAQg` `TgBlAFQALgBXAEUAYg` `TgBlAFQALgBXAGUAQg` `TgBlAFQALgBXAGUAYg` `TgBlAHQALgB3AEUAQg` `TgBlAHQALgB3AEUAYg` `TgBlAHQALgB3AGUAQg` `TgBlAHQALgBXAEUAQg` `TgBlAHQALgBXAEUAYg` `TgBlAHQALgBXAGUAQg` `bgBFAFQALgB3AEUAQg` `bgBFAFQALgB3AEUAYg` `bgBFAFQALgB3AGUAQg` `bgBFAFQALgB3AGUAYg` `bgBFAFQALgBXAEUAQg` `bgBFAFQALgBXAEUAYg` `bgBFAFQALgBXAGUAQg` `bgBFAFQALgBXAGUAYg` `bgBFAHQALgB3AEUAQg` `bgBFAHQALgB3AEUAYg` `bgBFAHQALgB3AGUAQg` `bgBFAHQALgB3AGUAYg` `bgBFAHQALgBXAEUAQg` `bgBFAHQALgBXAEUAYg` `bgBFAHQALgBXAGUAQg` `bgBFAHQALgBXAGUAYg` `bgBlAFQALgB3AEUAQg` `bgBlAFQALgB3AEUAYg` `bgBlAFQALgB3AGUAQg` `bgBlAFQALgB3AGUAYg` `bgBlAFQALgBXAEUAQg` `bgBlAFQALgBXAEUAYg` `bgBlAFQALgBXAGUAQg` `bgBlAFQALgBXAGUAYg` `bgBlAHQALgB3AEUAQg` `bgBlAHQALgB3AEUAYg` `bgBlAHQALgB3AGUAQg` `bgBlAHQALgBXAEUAYg` `bgBlAHQALgBXAGUAQg` `bgBlAHQALgBXAGUAYg` `uAEUAVAAuAFcARQBCA` `uAEUAVAAuAFcARQBiA` `uAEUAVAAuAFcAZQBCA` `uAEUAVAAuAFcAZQBiA` `uAEUAVAAuAHcARQBCA` `uAEUAVAAuAHcARQBiA` `uAEUAVAAuAHcAZQBCA` `uAEUAVAAuAHcAZQBiA` `uAEUAdAAuAFcARQBCA` `uAEUAdAAuAFcARQBiA` `uAEUAdAAuAFcAZQBCA` `uAEUAdAAuAFcAZQBiA` `uAEUAdAAuAHcARQBCA` `uAEUAdAAuAHcARQBiA` `uAEUAdAAuAHcAZQBCA` `uAEUAdAAuAHcAZQBiA` `uAGUAVAAuAFcARQBCA` `uAGUAVAAuAFcARQBiA` `uAGUAVAAuAFcAZQBCA` `uAGUAVAAuAFcAZQBiA` `uAGUAVAAuAHcARQBCA` `uAGUAVAAuAHcARQBiA` `uAGUAVAAuAHcAZQBCA` `uAGUAVAAuAHcAZQBiA` `uAGUAdAAuAFcARQBiA` `uAGUAdAAuAFcAZQBCA` `uAGUAdAAuAFcAZQBiA` `uAGUAdAAuAHcARQBCA` `uAGUAdAAuAHcARQBiA` `uAGUAdAAuAHcAZQBCA`
`Image`	ends_with	`\powershell.exe` corpus 182 (sigma 182) `\pwsh.exe` corpus 168 (sigma 168)
`OriginalFileName`	eq	`PowerShell.EXE` corpus 120 (sigma 84, splunk 30, elastic 6) `pwsh.dll` corpus 112 (sigma 79, splunk 30, elastic 3)

`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)

Net WebClient Casing Anomalies

MITRE ATT&CK coverage

Event coverage

Rule body yaml

Stages and Predicates

Stage 0: `condition`

Stage 1: `selection_img`

Stage 2: `selection_encoded`

Indicators

Keyboard shortcuts

Search operators

Net WebClient Casing Anomalies

MITRE ATT&CK coverage

Event coverage

Rule body yaml

Stages and Predicates

Stage 0: condition

Stage 1: selection_img

Stage 2: selection_encoded

Indicators

Stage 0: `condition`

Stage 1: `selection_img`

Stage 2: `selection_encoded`