Doppelpaymer Stop Services

Status: available
Severity: high
Time window: 1h
Source: github.com/Azure/Azure-Sentinel

This query was originally published in the threat analytics report, Doppelpaymer: More human-operated ransomware. There is also a related blog. DoppelPaymer is ransomware that is spread manually by human operators. These operators have exhibited extensive knowledge of system administration and common network security misconfigurations. They often use stolen credentials from over-privileged service accounts to turn off security software, run malicious commands, and spread malware throughout an organization. The following query detects attempts to stop security services. The See also section below lists links to other queries associated with DoppelPaymer. References: https://msrc-blog.microsoft.com/2019/11/20/customer-guidance-for-the-dopplepaymer-ransomware/ https://www.microsoft.com/en-us/wdsi/threats/malware-encyclopedia-description?Name=Ransom:Win32/DoppelPaymer.KM!MTB

MITRE ATT&CK coverage

Tactic	Techniques
Execution	`T1059` Command and Scripting Interpreter
Defense Impairment	`T1685` Disable or Modify Tools

Telemetry coverage

Platform	Record / event type
Microsoft Defender for Endpoint	`DeviceProcessEvents` action `any`: Process activity

Rule body

id: 5bdc1504-880c-4b30-a39c-7c746535928d
name: Doppelpaymer Stop Services
description: |
  This query was originally published in the threat analytics report, Doppelpaymer: More human-operated ransomware. There is also a related blog.
  DoppelPaymer is ransomware that is spread manually by human operators. These operators have exhibited extensive knowledge of system administration and common network security misconfigurations. They often use stolen credentials from over-privileged service accounts to turn off security software, run malicious commands, and spread malware throughout an organization.
  The following query detects attempts to stop security services.
  The See also section below lists links to other queries associated with DoppelPaymer.
  References:
  https://msrc-blog.microsoft.com/2019/11/20/customer-guidance-for-the-dopplepaymer-ransomware/
  https://www.microsoft.com/en-us/wdsi/threats/malware-encyclopedia-description?Name=Ransom:Win32/DoppelPaymer.KM!MTB
severity: High
status: Available
requiredDataConnectors:
  - connectorId: MicrosoftThreatProtection
    dataTypes:
      - DeviceProcessEvents
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
  - Execution
  - DefenseEvasion
relevantTechniques:
  - T1059
  - T1562
tags:
  - DoppelPaymer
  - Ransomware
query: |
  // Attempts to stop services and allow ransomware execution
  DeviceProcessEvents
  | where InitiatingProcessFileName startswith "psexe" and FileName =~ "powershell.exe" and
    ProcessCommandLine has "stop-service" and ProcessCommandLine has "sql" and ProcessCommandLine has "msexchange"
  | extend HostName = iff(DeviceName has '.', substring(DeviceName, 0, indexof(DeviceName, '.')), DeviceName)
  | extend DnsDomain = iff(DeviceName has '.', substring(DeviceName, indexof(DeviceName, '.') + 1), "")
entityMappings:
  - entityType: Host
    fieldMappings:
      - identifier: FullName
        columnName: DeviceName
      - identifier: HostName
        columnName: HostName
      - identifier: DnsDomain
        columnName: DnsDomain
version: 1.0.0
kind: Scheduled

Stages and Predicates

Stage 1: `source`

DeviceProcessEvents

Stage 2: `where`

| where InitiatingProcessFileName startswith "psexe" and FileName =~ "powershell.exe" and
  ProcessCommandLine has "stop-service" and ProcessCommandLine has "sql" and ProcessCommandLine has "msexchange"

Stage 3: `extend`

| extend HostName = iff(DeviceName has '.', substring(DeviceName, 0, indexof(DeviceName, '.')), DeviceName)

HostName =

ifDeviceName has "."substring(DeviceName, 0, indexof(DeviceName, '.'))

elseDeviceName

Stage 4: `extend`

| extend DnsDomain = iff(DeviceName has '.', substring(DeviceName, indexof(DeviceName, '.') + 1), "")

DnsDomain =

ifDeviceName has "."substring(DeviceName, (indexof(DeviceName, '.') + 1))

else""

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`FileName`	eq	`powershell.exe` corpus 3 (kusto 3)	`field:"file_name" kind:eq value:"powershell.exe"`
`InitiatingProcessFileName`	starts_with	`psexe`	`field:"parent_process_name" kind:starts_with value:"psexe"`
`ProcessCommandLine`	match	`msexchange` transforms: `term` corpus 4 (sigma 3, kusto 1) `sql` transforms: `term` `stop-service` transforms: `term`	`field:"CommandLine" kind:match`

Output fields

These fields are emitted when the rule matches.

Field	Source
`HostName`	`extend`
`DnsDomain`	`extend`