Hayabusa medium test sigma

Access to Browser Login Data

Adversaries may acquire credentials from web browsers by reading files specific to the target browser. Web browsers commonly save credentials such as website usernames and passwords so that they do not need to be entered manually in the future. Web browsers typically store the credentials in an encrypted format within a credential store.

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Detection Logic

{
  "ps_script": {
    "EventID": 4104,
    "Channel": [
      "Microsoft-Windows-PowerShell/Operational",
      "PowerShellCore/Operational"
    ]
  },
  "selection_cmd": {
    "ScriptBlockText
| contains
| all": [
      "Copy-Item",
      "-Destination"
    ]
  },
  "selection_path": {
    "ScriptBlockText
| contains": [
      "\\Opera Software\\Opera Stable\\Login Data",
      "\\Mozilla\\Firefox\\Profiles",
      "\\Microsoft\\Edge\\User Data\\Default",
      "\\Google\\Chrome\\User Data\\Default\\Login Data",
      "\\Google\\Chrome\\User Data\\Default\\Login Data For Account"
    ]
  },
  "condition": "ps_script and (all of selection_*)"
}

False Positives

  • ⚠ Unknown

Field Validations

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