Possible UAC Bypass via SilentCleanup Scheduled Task

ATT&CK techniques

Priv Esc → Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
- T1548.002Bypass User Account Control
Defense Evasion
- T1548.002Bypass User Account Control
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects invocation of the SilentCleanup scheduled task through schtasks, a known User Account Control bypass that runs an auto-elevated task to execute code with high integrity. Adversaries abuse this task to escalate privileges without prompting the user.

Reporting behind it

Related detections9 linkedT1548.002 — drag to rearrange

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Malicious UAC Bypass via COMAutoApprovalList Registry Modification (via registry_set)

Suspicious UAC Bypass via COMAutoApprovalList Registry Modification (via registry_set)

Malicious UAC Bypass via explorer.exe NOUACCHECK Argument

Possible UAC Bypass via SilentCleanup Scheduled Task

Pivot detection · T1548.002 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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