Hayabusa medium stable sigma

Potential WMI Lateral Movement WmiPrvSE Spawned PowerShell

Detects Powershell as a child of the WmiPrvSE process. Which could be a sign of lateral movement via WMI.

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Detection Logic

{
  "process_creation": {
    "EventID": 4688,
    "Channel": "Security"
  },
  "selection_parent": {
    "ParentProcessName
| endswith": "\\WmiPrvSE.exe"
  },
  "selection_img": [
    {
      "NewProcessName
| endswith": [
        "\\powershell.exe",
        "\\pwsh.exe"
      ]
    },
    {
      "OriginalFileName": [
        "PowerShell.EXE",
        "pwsh.dll"
      ]
    }
  ],
  "condition": "process_creation and (all of selection_*)"
}

False Positives

  • ⚠ AppvClient
  • ⚠ CCM
  • ⚠ WinRM

Field Validations

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