title: Suspicious Use of Procdump on LSASS
id: 5afee48e-67dd-4e03-a783-f74259dcf998
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: stable
references:
    - Internal Research
author: Florian Roth
date: 2018/10/30
modified: 2021/02/02
tags:
    - attack.defense_evasion
    - attack.t1036
    - attack.credential_access
    - attack.t1003.001
    - car.2013-05-009
logsource:
    category: process_creation
    product: windows
detection:
    selection1:
        CommandLine|contains: ' -ma '
    selection2:
        CommandLine|contains: ' lsass'
    selection3:
        CommandLine|contains|all:
            - ' -ma '
            - ' ls'
    condition: ( selection1 and selection2 ) or selection3
falsepositives:
    - Unlikely, because no one should dump an lsass process memory
    - Another tool that uses the command line switches of Procdump
level: critical
