sigmahighHunting

Lsass Memory Dump via Comsvcs DLL

Detects adversaries leveraging the MiniDump export function from comsvcs.dll via rundll32 to perform a memory dump from lsass.

MITRE ATT&CK

T1003.001

credential-access

Detection Query

selection:
  TargetImage|endswith: \lsass.exe
  SourceImage|endswith: \rundll32.exe
  CallTrace|contains: comsvcs.dll
condition: selection

Author

Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)

Created

2020-10-20

Data Sources

windowsProcess Access Events

Platforms

windows

References

Tags

attack.credential-accessattack.t1003.001

Raw Content

title: Lsass Memory Dump via Comsvcs DLL
id: a49fa4d5-11db-418c-8473-1e014a8dd462
status: test
description: Detects adversaries leveraging the MiniDump export function from comsvcs.dll via rundll32 to perform a memory dump from lsass.
references:
    - https://twitter.com/shantanukhande/status/1229348874298388484
    - https://modexp.wordpress.com/2019/08/30/minidumpwritedump-via-com-services-dll/
author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)
date: 2020-10-20
modified: 2023-11-29
tags:
    - attack.credential-access
    - attack.t1003.001
logsource:
    category: process_access
    product: windows
detection:
    selection:
        TargetImage|endswith: '\lsass.exe'
        SourceImage|endswith: '\rundll32.exe'
        CallTrace|contains: 'comsvcs.dll'
    condition: selection
falsepositives:
    - Unknown
level: high