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 Hijackedit
Identifies 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: 5m
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
- CVE-2020-1313
Version: 100
Rule authors:
- Elastic
Rule license: Elastic License v2
Investigation guideedit
Rule queryedit
process where event.type == "start" and process.parent.executable : "C:\\Windows\\System32\\svchost.exe" and process.parent.args : "UsoSvc" and not process.executable : ("?:\\ProgramData\\Microsoft\\Windows\\UUS\\Packages\\*\\amd64\\MoUsoCoreWorker.exe", "?:\\Windows\\System32\\UsoClient.exe", "?:\\Windows\\System32\\MusNotification.exe", "?:\\Windows\\System32\\MusNotificationUx.exe", "?:\\Windows\\System32\\MusNotifyIcon.exe", "?:\\Windows\\System32\\WerFault.exe", "?:\\Windows\\System32\\WerMgr.exe", "?:\\Windows\\UUS\\amd64\\MoUsoCoreWorker.exe", "?:\\Windows\\System32\\MoUsoCoreWorker.exe", "?:\\Windows\\UUS\\amd64\\UsoCoreWorker.exe", "?:\\Windows\\System32\\UsoCoreWorker.exe", "?:\\Program Files\\Common Files\\microsoft shared\\ClickToRun\\OfficeC2RClient.exe") and not process.name : ("MoUsoCoreWorker.exe", "OfficeC2RClient.exe")
Framework: 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/
-
Sub-technique:
- Name: Windows Service
- ID: T1543.003
- Reference URL: https://attack.mitre.org/techniques/T1543/003/