Unusual Persistence via Services Registry | Elastic Security Solution [8.6]

IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Unusual Persistence via Services Registryedit

Identifies processes modifying the services registry key directly, instead of through the expected Windows APIs. This could be an indication of an adversary attempting to stealthily persist through abnormal service creation or modification of an existing service.

Rule type: eql

Rule indices:

logs-endpoint.events.*
endgame-*

Severity: low

Risk score: 21

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References: None

Tags:

Domain: Endpoint
OS: Windows
Use Case: Threat Detection
Tactic: Persistence
Data Source: Elastic Endgame

Version: 103

Rule authors:

Elastic

Rule license: Elastic License v2

Rule queryedit

registry where host.os.type == "windows" and
  registry.path : (
      "HKLM\\SYSTEM\\ControlSet*\\Services\\*\\ServiceDLL",
      "HKLM\\SYSTEM\\ControlSet*\\Services\\*\\ImagePath",
      "\\REGISTRY\\MACHINE\\SYSTEM\\ControlSet*\\Services\\*\\ServiceDLL",
      "\\REGISTRY\\MACHINE\\SYSTEM\\ControlSet*\\Services\\*\\ImagePath"
  ) and not registry.data.strings : (
      "?:\\windows\\system32\\Drivers\\*.sys",
      "\\SystemRoot\\System32\\drivers\\*.sys",
      "\\??\\?:\\Windows\\system32\\Drivers\\*.SYS",
      "system32\\DRIVERS\\USBSTOR") and
  not (process.name : "procexp??.exe" and registry.data.strings : "?:\\*\\procexp*.sys") and
  not process.executable : (
      "?:\\Program Files\\*.exe",
      "?:\\Program Files (x86)\\*.exe",
      "?:\\Windows\\System32\\svchost.exe",
      "?:\\Windows\\winsxs\\*\\TiWorker.exe",
      "?:\\Windows\\System32\\drvinst.exe",
      "?:\\Windows\\System32\\services.exe",
      "?:\\Windows\\System32\\msiexec.exe",
      "?:\\Windows\\System32\\regsvr32.exe")

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Persistence
- ID: TA0003
- Reference URL: https://attack.mitre.org/tactics/TA0003/
Technique:
- Name: Create or Modify System Process
- ID: T1543
- Reference URL: https://attack.mitre.org/techniques/T1543/
Sub-technique:
- Name: Windows Service
- ID: T1543.003
- Reference URL: https://attack.mitre.org/techniques/T1543/003/

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