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Microsoft Build Engine Started by a System Process
editMicrosoft Build Engine Started by a System Process
editAn instance of MSBuild, the Microsoft Build Engine, was started by Explorer or the WMI (Windows Management Instrumentation) subsystem. This behavior is unusual and is sometimes used by malicious payloads.
Rule type: query
Rule indices:
- winlogbeat-*
- logs-endpoint.events.*
Severity: medium
Risk score: 47
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
Tags:
- Elastic
- Windows
Version: 3 (version history)
Added (Elastic Stack release): 7.7.0
Last modified (Elastic Stack release): 7.9.1
Rule authors: Elastic
Rule license: Elastic License
Potential false positives
editThe Build Engine is commonly used by Windows developers but use by non-engineers is unusual.
Rule query
editevent.category:process and event.type:(start or process_started) and process.name:MSBuild.exe and process.parent.name:(explorer.exe or wmiprvse.exe)
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Trusted Developer Utilities
- ID: T1127
- Reference URL: https://attack.mitre.org/techniques/T1127/
-
Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
-
Technique:
- Name: Trusted Developer Utilities
- ID: T1127
- Reference URL: https://attack.mitre.org/techniques/T1127/
Rule version history
edit- Version 3 (7.9.1 release)
-
- Formatting only
- Version 2 (7.9.0 release)
-
-
Updated query, changed from:
process.name:MSBuild.exe and process.parent.name:(explorer.exe or wmiprvse.exe) and event.action:"Process Create (rule: ProcessCreate)"
-