Detection rules › Sigma

Invoke-Obfuscation RUNDLL LAUNCHER - PowerShell Module

Severity
medium
Author
Timur Zinniatullin, oscd.community
Source
upstream

Detects Obfuscated Powershell via RUNDLL LAUNCHER

MITRE ATT&CK coverage

TacticTechniques
ExecutionT1059.001 Command and Scripting Interpreter: PowerShell
Defense EvasionT1027 Obfuscated Files or Information

Event coverage

ProviderEvent IDTitle
PowerShell4103Payload Context: ContextInfo User Data: UserData.

Stages and Predicates

Stage 1: selection_4103

Payload|contains: powershell
Payload|contains: rundll32.exe
Payload|contains: shell32.dll
Payload|contains: shellexec_rundll

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
Payloadmatch
  • powershell
  • rundll32.exe
  • shell32.dll corpus 2 (sigma 2)
  • shellexec_rundll corpus 2 (sigma 2)