IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Persistence via Update Orchestrator Service Hijack
editPersistence via Update Orchestrator Service Hijack
editIdentifies potential hijacking of the Microsoft Update Orchestrator Service to establish persistence with an integrity level of SYSTEM.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-endpoint.events.*
- logs-windows.*
Severity: high
Risk score: 73
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Persistence
Version: 5 (version history)
Added (Elastic Stack release): 7.10.0
Last modified (Elastic Stack release): 8.2.0
Rule authors: Elastic
Rule license: Elastic License v2
Investigation guide
edit## Config If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define `event.ingested` and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.
Rule query
editprocess where event.type == "start" and process.parent.executable : "C:\\Windows\\System32\\svchost.exe" and process.parent.args : "UsoSvc" and not process.executable : ( "C:\\Windows\\System32\\UsoClient.exe", "C:\\Windows\\System32\\MusNotification.exe", "C:\\Windows\\System32\\MusNotificationUx.exe", "C:\\Windows\\System32\\MusNotifyIcon.exe", "C:\\Windows\\System32\\WerFault.exe", "C:\\Windows\\System32\\WerMgr.exe" )
Threat mapping
editFramework: MITRE ATT&CKTM
-
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/
Rule version history
edit- Version 5 (8.2.0 release)
-
- Formatting only
- Version 4 (7.12.0 release)
-
-
Updated query, changed from:
event.category:process and event.type:(start or process_started) and process.parent.name:svchost.exe and process.parent.args:(UsoSvc or usosvc) and not process.name:(UsoClient.exe or usoclient.exe or MusNotification.exe or musnotification.exe or MusNotificationUx.exe or musnotificationux.exe)
-
- Version 3 (7.11.2 release)
-
- Formatting only
- Version 2 (7.11.0 release)
-
- Formatting only