Lsass Full Dump Request Via DumpType Registry Settings — Sigma Rule

Rule metadata and linked tags

Author: @pbssubhash. Source status: test; severity: high. Source dates: 2022-12-08 / 2023-08-17.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 5ad0217482907aae2c3b3c76380ea68319631acd736e53b5efb46e80e509076e

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: Lsass Full Dump Request Via DumpType Registry Settings
id: 33efc23c-6ea2-4503-8cfe-bdf82ce8f719
status: test
description: Detects the setting of the "DumpType" registry value to "2" which stands for a "Full Dump". Technique such as LSASS Shtinkering requires this value to be "2" in order to dump LSASS.
references:
    - https://github.com/deepinstinct/Lsass-Shtinkering
    - https://learn.microsoft.com/en-us/windows/win32/wer/collecting-user-mode-dumps
    - https://media.defcon.org/DEF%20CON%2030/DEF%20CON%2030%20presentations/Asaf%20Gilboa%20-%20LSASS%20Shtinkering%20Abusing%20Windows%20Error%20Reporting%20to%20Dump%20LSASS.pdf
author: '@pbssubhash'
date: 2022-12-08
modified: 2023-08-17
tags:
    - attack.credential-access
    - attack.t1003.001
logsource:
    category: registry_set
    product: windows
detection:
    selection:
        TargetObject|contains:
            - '\SOFTWARE\Microsoft\Windows\Windows Error Reporting\LocalDumps\DumpType'
            - '\SOFTWARE\Microsoft\Windows\Windows Error Reporting\LocalDumps\lsass.exe\DumpType'
        Details: 'DWORD (0x00000002)' # Full Dump
    condition: selection
falsepositives:
    - Legitimate application that needs to do a full dump of their process
level: high

Original YAML and metadata in JSON

False positives

• Legitimate application that needs to do a full dump of their process

Source references

• https://github.com/deepinstinct/Lsass-Shtinkering
• https://learn.microsoft.com/en-us/windows/win32/wer/collecting-user-mode-dumps
• https://media.defcon.org/DEF%20CON%2030/DEF%20CON%2030%20presentations/Asaf%20Gilboa%20-%20LSASS%20Shtinkering%20Abusing%20Windows%20Error%20Reporting%20to%20Dump%20LSASS.pdf