Detection rules › Sigma
UAC Bypass Using Disk Cleanup
Detects the pattern of UAC Bypass using scheduled tasks and variable expansion of cleanmgr.exe (UACMe 34)
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Privilege Escalation | T1548.002 Abuse Elevation Control Mechanism: Bypass User Account Control |
| Defense Evasion | T1548.002 Abuse Elevation Control Mechanism: Bypass User Account Control |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 1 | Process creation |
Stages and Predicates
Stage 1: selection
IntegrityLevel: [High, S-1-16-12288, S-1-16-16384, System]
CommandLine|endswith: '"\system32\cleanmgr.exe /autoclean /d C:'
ParentCommandLine: 'C:\Windows\system32\svchost.exe -k netsvcs -p -s Schedule'
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
CommandLine | ends_with |
|
IntegrityLevel | eq |
|
ParentCommandLine | eq |
|