Sigma medium test sigma

HH.EXE Initiated HTTP Network Connection

Detects a network connection initiated by the "hh.exe" process to HTTP destination ports, which could indicate the execution/download of remotely hosted .chm files.

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Detection Logic

{
  "selection": {
    "Image
| endswith": "\\hh.exe",
    "Initiated": "true",
    "DestinationPort": [
      80,
      443
    ]
  },
  "condition": "selection"
}

False Positives

  • ⚠ False positive is expected from launching "hh.exe" for the first time on a machine in a while or simply from help files containing reference to external sources. Best correlate this with process creation and file events.

Field Validations

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