action: global
title: Suspicious Use of Procdump
description: Detects suspicious uses of the SysInternals Procdump utility by using a special command line parameter in combination with the lsass.exe process. This way we're also able to catch cases in which the attacker has renamed the procdump executable. 
status: experimental
references:
    - Internal Research
author: Florian Roth
date: 2018/10/30
tags:
    - attack.defense_evasion
    - attack.t1036
    - attack.credential_access
    - attack.t1003
detection:
    condition: selection and selection1 and selection2
falsepositives: 
    - Unlikely, because no one should dump an lsass process memory
    - Another tool that uses the command line switches of Procdump
level: medium
---
# Windows Audit Log
logsource:
    product: windows
    service: security
    definition: 'Requirements: Audit Policy : Detailed Tracking > Audit Process creation, Group Policy : Administrative Templates\System\Audit Process Creation'
detection:
    selection:
        EventID: 4688
    selection1:
        ProcessCommandLine:
            - "* -ma *"
    selection2: 
        ProcessCommandLine:
            - '* lsass.exe*'
---
# Sysmon
logsource:
    product: windows
    service: sysmon
detection:
    selection:
        EventID: 1
    selection1:
        CommandLine:
            - "* -ma *"
    selection2: 
        CommandLine:
            - '* lsass.exe*'