Potential SysInternals ProcDump Evasion

Description

Detects uses of the SysInternals ProcDump utility in which ProcDump or its output get renamed, or a dump file is moved or copied to a different name

Query · sigma

selection_1:
  CommandLine|contains:
  - copy procdump
  - move procdump
selection_2:
  CommandLine|contains|all:
  - 'copy '
  - '.dmp '
  CommandLine|contains:
  - 2.dmp
  - lsass
  - out.dmp
selection_3:
  CommandLine|contains:
  - copy lsass.exe_
  - move lsass.exe_
condition: 1 of selection_*

Known false positives

  • False positives are expected in cases in which ProcDump just gets copied to a different directory without any renaming
Raw source Potential SysInternals ProcDump Evasion · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Potential SysInternals ProcDump Evasion
id: 79b06761-465f-4f88-9ef2-150e24d3d737
status: test
description: Detects uses of the SysInternals ProcDump utility in which ProcDump or its output get renamed, or a dump file is moved or copied to a different name
references:
    - https://twitter.com/mrd0x/status/1480785527901204481
author: Florian Roth (Nextron Systems)
date: 2022-01-11
modified: 2023-05-09
tags:
    - attack.stealth
    - attack.t1036
    - attack.t1003.001
    - attack.credential-access
logsource:
    category: process_creation
    product: windows
detection:
    selection_1:
        CommandLine|contains:
            - 'copy procdump'
            - 'move procdump'
    selection_2:
        CommandLine|contains|all:
            - 'copy '
            - '.dmp '
        CommandLine|contains:
            - '2.dmp'
            - 'lsass'
            - 'out.dmp'
    selection_3:
        CommandLine|contains:
            - 'copy lsass.exe_'  # procdump default pattern e.g. lsass.exe_220111_085234.dmp
            - 'move lsass.exe_'  # procdump default pattern e.g. lsass.exe_220111_085234.dmp
    condition: 1 of selection_*
falsepositives:
    - False positives are expected in cases in which ProcDump just gets copied to a different directory without any renaming
level: high

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