Hayabusa medium test sigma

Potential ShellDispatch.DLL Functionality Abuse

Detects potential "ShellDispatch.dll" functionality abuse to execute arbitrary binaries via "ShellExecute"

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Detection Logic

{
  "process_creation": {
    "EventID": 4688,
    "Channel": "Security"
  },
  "selection_img": [
    {
      "NewProcessName
| endswith": "\\rundll32.exe"
    },
    {
      "OriginalFileName": "RUNDLL32.EXE"
    }
  ],
  "selection_cli": {
    "CommandLine
| contains": "RunDll_ShellExecuteW"
  },
  "condition": "process_creation and (all of selection_*)"
}

False Positives

  • ⚠ Unlikely

Field Validations

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