Hayabusa critical test sigma

Rorschach Ransomware Execution Activity

Detects Rorschach ransomware execution activity

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Detection Logic

{
  "process_creation": {
    "EventID": 4688,
    "Channel": "Security"
  },
  "selection": {
    "CommandLine
| contains": "11111111",
    "NewProcessName
| endswith": [
      "\\bcdedit.exe",
      "\\net.exe",
      "\\net1.exe",
      "\\netsh.exe",
      "\\wevtutil.exe",
      "\\vssadmin.exe"
    ]
  },
  "condition": "process_creation and selection"
}

False Positives

  • ⚠ Unlikely

Field Validations

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