Detectionmediumtest
File Decryption Using Gpg4win
Detects usage of Gpg4win to decrypt files
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Launch
Nasreddine Bencherchali (Nextron Systems)Created Wed Aug 09037dcd71-33a8-4392-bb01-293c94663e5awindows
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic2 selectors
detection:
selection_metadata:
- Image|endswith:
- '\gpg.exe'
- '\gpg2.exe'
- Description: 'GnuPG’s OpenPGP tool'
selection_cli:
CommandLine|contains|all:
- ' -d '
- 'passphrase'
condition: all of selection_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
MITRE ATT&CK
Tactics
Rule Metadata
Rule ID
037dcd71-33a8-4392-bb01-293c94663e5a
Status
test
Level
medium
Type
Detection
Created
Wed Aug 09
Path
rules/windows/process_creation/proc_creation_win_gpg4win_decryption.yml
Raw Tags
attack.execution