Nasreddine Bencherchali
598d29f811
chore: change tags, date, modified fields to comply with v2 of the Sigma spec. chore: update the related type from `obsoletes` to `obsolete`. chore: update local json schema to the latest version.
30 lines
918 B
YAML
30 lines
918 B
YAML
title: File Decryption Using Gpg4win
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id: 037dcd71-33a8-4392-bb01-293c94663e5a
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status: test
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description: Detects usage of Gpg4win to decrypt files
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references:
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- https://blogs.vmware.com/security/2022/11/batloader-the-evasive-downloader-malware.html
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- https://www.gpg4win.de/documentation.html
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- https://news.sophos.com/en-us/2022/01/19/zloader-installs-remote-access-backdoors-and-delivers-cobalt-strike/
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author: Nasreddine Bencherchali (Nextron Systems)
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date: 2023-08-09
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tags:
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- attack.execution
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logsource:
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category: process_creation
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product: windows
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detection:
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selection_metadata:
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- Image|endswith:
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- '\gpg.exe'
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- '\gpg2.exe'
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- Description: 'GnuPG’s OpenPGP tool'
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selection_cli:
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CommandLine|contains|all:
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- ' -d '
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- 'passphrase'
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condition: all of selection_*
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falsepositives:
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- Unknown
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level: medium
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