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sigmahighHunting

HackTool - CrackMapExec Process Patterns

Detects suspicious process patterns found in logs when CrackMapExec is used

MITRE ATT&CK

T1003.001
credential-access

Detection Query

selection_lsass_dump1:
  CommandLine|contains|all:
    - "tasklist /fi "
    - Imagename eq lsass.exe
  CommandLine|contains:
    - "cmd.exe /c "
    - "cmd.exe /r "
    - "cmd.exe /k "
    - "cmd /c "
    - "cmd /r "
    - "cmd /k "
  User|contains:
    - AUTHORI
    - AUTORI
selection_lsass_dump2:
  CommandLine|contains|all:
    - do rundll32.exe C:\windows\System32\comsvcs.dll, MiniDump
    - \Windows\Temp\
    - " full"
    - "%%B"
selection_procdump:
  CommandLine|contains|all:
    - tasklist /v /fo csv
    - findstr /i "lsass"
condition: 1 of selection*

Author

Florian Roth (Nextron Systems)

Created

2022-03-12

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.credential-accessattack.t1003.001
Raw Content
title: HackTool - CrackMapExec Process Patterns
id: f26307d8-14cd-47e3-a26b-4b4769f24af6
status: test
description: Detects suspicious process patterns found in logs when CrackMapExec is used
references:
    - https://mpgn.gitbook.io/crackmapexec/smb-protocol/obtaining-credentials/dump-lsass
author: Florian Roth (Nextron Systems)
date: 2022-03-12
modified: 2023-02-13
tags:
    - attack.credential-access
    - attack.t1003.001
logsource:
    product: windows
    category: process_creation
detection:
    selection_lsass_dump1:
        CommandLine|contains|all:
            - 'tasklist /fi '
            - 'Imagename eq lsass.exe'
        CommandLine|contains:
            - 'cmd.exe /c '
            - 'cmd.exe /r '
            - 'cmd.exe /k '
            - 'cmd /c '
            - 'cmd /r '
            - 'cmd /k '
        User|contains: # covers many language settings
            - 'AUTHORI'
            - 'AUTORI'
    selection_lsass_dump2:
        CommandLine|contains|all:
            - 'do rundll32.exe C:\windows\System32\comsvcs.dll, MiniDump'
            - '\Windows\Temp\'
            - ' full'
            - '%%B'
    selection_procdump:
        CommandLine|contains|all:
            - 'tasklist /v /fo csv'
            - 'findstr /i "lsass"'
    condition: 1 of selection*
falsepositives:
    - Unknown
level: high