HackTool - Doppelanger LSASS Dumper Execution — Sigma Rule

Rule metadata and linked tags

Author: Swachchhanda Shrawan Poudel (Nextron Systems). Source status: experimental; severity: high. Source dates: 2025-07-01 / not supplied.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 352b7e92db0fed84443da106a9b33f3172661ad4974cffe75029e223f85941cb

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: HackTool - Doppelanger LSASS Dumper Execution
id: d474c8fe-bb69-4ea0-b7d9-f682b56d52d3
status: experimental
description: Detects the execution of the Doppelanger hacktool which is used to dump LSASS memory via process cloning while evading common detection methods
references:
    - https://labs.yarix.com/2025/06/doppelganger-an-advanced-lsass-dumper-with-process-cloning/
    - https://github.com/vari-sh/RedTeamGrimoire/tree/668e0357072546065729ad623f8c02f7be21bb08/Doppelganger
author: Swachchhanda Shrawan Poudel (Nextron Systems)
date: 2025-07-01
tags:
    - attack.credential-access
    - attack.t1003.001
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        - Image|endswith: '\Doppelganger.exe'
        - Hashes|contains:
              - 'IMPHASH=AB94D5217896ADCD765A06B2D52F0AEB'
              - 'IMPHASH=65F0EA61156EE0C2A35421926F0C7F78'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://labs.yarix.com/2025/06/doppelganger-an-advanced-lsass-dumper-with-process-cloning/
• https://github.com/vari-sh/RedTeamGrimoire/tree/668e0357072546065729ad623f8c02f7be21bb08/Doppelganger