Detection rules › Sigma

HackTool - Stracciatella Execution

Severity
high
Author
pH-T (Nextron Systems)
Source
upstream

Detects Stracciatella which executes a Powershell runspace from within C# (aka SharpPick technique) with AMSI, ETW and Script Block Logging disabled based on PE metadata characteristics.

MITRE ATT&CK coverage

TacticTechniques
ExecutionT1059 Command and Scripting Interpreter
Defense EvasionT1562.001 Impair Defenses: Disable or Modify Tools

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation

Stages and Predicates

Stage 1: selection

or:
Description: Stracciatella
Hashes|contains: 'SHA256=9d25e61ec1527e2a69d7c2a4e3fe2fe15890710c198a66a9f25d99fdf6c7b956'
Hashes|contains: 'SHA256=fd16609bd9830c63b9413671678bb159b89c357d21942ddbb6b93add808d121a'
Image|endswith: '\Stracciatella.exe'
OriginalFileName: Stracciatella.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
Descriptioneq
  • Stracciatella
Hashesmatch
  • SHA256=9d25e61ec1527e2a69d7c2a4e3fe2fe15890710c198a66a9f25d99fdf6c7b956
  • SHA256=fd16609bd9830c63b9413671678bb159b89c357d21942ddbb6b93add808d121a
Imageends_with
  • \Stracciatella.exe corpus 2 (sigma 2)
OriginalFileNameeq
  • Stracciatella.exe