Hayabusa medium test sigma

File Encryption Using Gpg4win

Detects usage of Gpg4win to encrypt files

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Detection Logic

{
  "process_creation": {
    "EventID": 1,
    "Channel": "Microsoft-Windows-Sysmon/Operational"
  },
  "selection_metadata": [
    {
      "Image
| endswith": [
        "\\gpg.exe",
        "\\gpg2.exe"
      ]
    },
    {
      "Description": "GnuPG’s OpenPGP tool"
    }
  ],
  "selection_cli": {
    "CommandLine
| contains
| all": [
      " -c ",
      "passphrase"
    ]
  },
  "condition": "process_creation and (all of selection_*)"
}

False Positives

  • ⚠ Unknown

Field Validations

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