Detection rules › Sigma

Potential Winnti Dropper Activity

Severity
high
Author
Alexander Rausch
Source
upstream

Detects files dropped by Winnti as described in RedMimicry Winnti playbook

MITRE ATT&CK coverage

TacticTechniques
Defense EvasionT1027 Obfuscated Files or Information

Event coverage

ProviderEvent IDTitle
Sysmon11FileCreate

Stages and Predicates

Stage 1: selection

or:
TargetFilename|endswith: '\Windows\Temp\tmp.bat'
TargetFilename|endswith: '\gthread-3.6.dll'
TargetFilename|endswith: '\sigcmm-2.4.dll'

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
TargetFilenameends_with
  • \Windows\Temp\tmp.bat
  • \gthread-3.6.dll
  • \sigcmm-2.4.dll