Hayabusa medium test sigma

C# IL Code Compilation Via Ilasm.EXE

Detects the use of "Ilasm.EXE" in order to compile C# intermediate (IL) code to EXE or DLL.

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Detection Logic

{
  "process_creation": {
    "EventID": 1,
    "Channel": "Microsoft-Windows-Sysmon/Operational"
  },
  "selection_img": [
    {
      "Image
| endswith": "\\ilasm.exe"
    },
    {
      "OriginalFileName": "ilasm.exe"
    }
  ],
  "selection_cli": {
    "CommandLine
| contains": [
      " /dll",
      " /exe"
    ]
  },
  "condition": "process_creation and (all of selection_*)"
}

False Positives

  • ⚠ Unknown

Field Validations

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