Detection rules › Sigma

Renamed Gpg.EXE Execution

Severity
high
Author
Nasreddine Bencherchali (Nextron Systems), frack113
Source
upstream

Detects the execution of a renamed "gpg.exe". Often used by ransomware and loaders to decrypt/encrypt data.

MITRE ATT&CK coverage

TacticTechniques
ImpactT1486 Data Encrypted for Impact

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation

Stages and Predicates

Stage 1: selection

OriginalFileName: gpg.exe

Stage 2: not 1 of filter_main_img

or:
Image|endswith: '\gpg.exe'
Image|endswith: '\gpg2.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
  • \gpg.exe corpus 5 (sigma 5)
  • \gpg2.exe corpus 5 (sigma 5)
OriginalFileNameeq
  • gpg.exe corpus 2 (sigma 2)