Execution of an Unsigned Service

This rule identifies the execution of unsigned executables via service control manager (SCM). Adversaries may abuse SCM to execute malware or escalate privileges.

Rule type: new_terms

Rule indices:

logs-endpoint.events.process-*

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: Execution
Tactic: Defense Evasion
Rule Type: BBR
Data Source: Elastic Defend

Version: 105

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

edit

host.os.type:windows and event.category:process and event.type:start and
process.parent.executable:"C:\\Windows\\System32\\services.exe" and
(process.code_signature.exists:false or process.code_signature.trusted:false) and
not process.code_signature.status : (errorCode_endpoint* or "errorChaining")

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
Technique:
- Name: System Services
- ID: T1569
- Reference URL: https://attack.mitre.org/techniques/T1569/
Sub-technique:
- Name: Service Execution
- ID: T1569.002
- Reference URL: https://attack.mitre.org/techniques/T1569/002/
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
Technique:
- Name: Masquerading
- ID: T1036
- Reference URL: https://attack.mitre.org/techniques/T1036/
Sub-technique:
- Name: Invalid Code Signature
- ID: T1036.001
- Reference URL: https://attack.mitre.org/techniques/T1036/001/

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