IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
UAC Bypass via DiskCleanup Scheduled Task Hijack
editUAC Bypass via DiskCleanup Scheduled Task Hijack
editIdentifies User Account Control (UAC) bypass via hijacking DiskCleanup Scheduled Task. Attackers bypass UAC to stealthily execute code with elevated permissions.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-endpoint.events.*
- logs-windows.*
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
- Host
- Windows
- Threat Detection
- Privilege Escalation
Version: 100 (version history)
Added (Elastic Stack release): 7.10.0
Last modified (Elastic Stack release): 8.5.0
Rule authors: Elastic
Rule license: Elastic License v2
Investigation guide
editRule query
editprocess where event.type == "start" and process.args : "/autoclean"
and process.args : "/d" and not process.executable :
("C:\\Windows\\System32\\cleanmgr.exe",
"C:\\Windows\\SysWOW64\\cleanmgr.exe",
"C:\\Windows\\System32\\taskhostw.exe")
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
-
Technique:
- Name: Abuse Elevation Control Mechanism
- ID: T1548
- Reference URL: https://attack.mitre.org/techniques/T1548/
Rule version history
edit- Version 100 (8.5.0 release)
-
- Formatting only
- Version 9 (8.4.0 release)
-
- Formatting only
- Version 7 (8.2.0 release)
-
- Formatting only
- Version 6 (7.15.0 release)
-
- Formatting only
- Version 5 (7.13.0 release)
-
-
Updated query, changed from:
process where event.type in ("start", "process_started") and process.args:"/autoclean" and process.args:"/d" and not process.executable : ("C:\\Windows\\System32\\cleanmgr.exe", "C:\\Windows\\SysWOW64\\cleanmgr.exe")
-
- Version 4 (7.12.0 release)
-
- Formatting only
- Version 3 (7.11.2 release)
-
- Formatting only
- Version 2 (7.11.0 release)
-
-
Updated query, changed from:
event.category:process and event.type:(start or process_started) and process.args:(/autoclean or /AUTOCLEAN) and process.parent.name:svchost.exe and not process.executable:("C:\Windows\System32\cleanmgr.exe" or "C:\Windows\SysWOW64\cleanmgr.exe")
-