Detection rules › Sigma

UAC Bypass via Windows Firewall Snap-In Hijack

Severity
medium
Author
Tim Rauch, Elastic (idea)
Source
upstream

Detects attempts to bypass User Account Control (UAC) by hijacking the Microsoft Management Console (MMC) Windows Firewall snap-in

MITRE ATT&CK coverage

TacticTechniques
Privilege EscalationT1548 Abuse Elevation Control Mechanism
Defense EvasionT1548 Abuse Elevation Control Mechanism

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation

Stages and Predicates

Stage 1: selection

ParentCommandLine|contains: WF.msc
ParentImage|endswith: '\mmc.exe'

Stage 2: not filter

Image|endswith: '\WerFault.exe'

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.

FieldKindValues
Imageends_with
  • \WerFault.exe corpus 8 (sigma 8)
ParentCommandLinematch
  • WF.msc
ParentImageends_with
  • \mmc.exe corpus 3 (sigma 3)