
title: Generic Password Dumper Activity on LSASS
author: Roberto Rodriguez, Teymur Kheirkhabarov, Dimitrios Slamaris, Mark Russinovich,
  Aleksey Potapov, oscd.community (update)
date: 2019/11/01
description: Detects process handle on LSASS process with certain access mask
detection:
  SELECTION_1:
    ObjectName: '*\lsass.exe'
  SELECTION_2:
    EventID: 4656
  SELECTION_3:
    AccessMask:
    - '*0x40*'
    - '*0x1400*'
    - '*0x1000*'
    - '*0x100000*'
    - '*0x1410*'
    - '*0x1010*'
    - '*0x1438*'
    - '*0x143a*'
    - '*0x1418*'
    - '*0x1f0fff*'
    - '*0x1f1fff*'
    - '*0x1f2fff*'
    - '*0x1f3fff*'
  SELECTION_4:
    EventID: 4663
  SELECTION_5:
    AccessList:
    - '*4484*'
    - '*4416*'
  SELECTION_6:
    ProcessName:
    - '*\wmiprvse.exe'
    - '*\taskmgr.exe'
    - '*\procexp64.exe'
    - '*\procexp.exe'
    - '*\lsm.exe'
    - '*\csrss.exe'
    - '*\wininit.exe'
    - '*\vmtoolsd.exe'
    - '*\minionhost.exe'
    - '*\VsTskMgr.exe'
    - '*\thor64.exe'
    - '*\MicrosoftEdgeUpdate.exe'
    - '*\GamingServices.exe'
    - '*\svchost.exe'
  SELECTION_7:
    ProcessName:
    - C:\Windows\System32\\*
    - C:\Windows\SysWow64\\*
    - C:\Windows\SysNative\\*
    - C:\Program Files\\*
    - C:\Windows\Temp\asgard2-agent\\*
  SELECTION_8:
    ProcessName:
    - C:\Program Files*
  condition: (((SELECTION_1 and ((SELECTION_2 and SELECTION_3) or (SELECTION_4 and
    SELECTION_5))) and  not (SELECTION_6 and SELECTION_7)) and  not (SELECTION_8))
falsepositives:
- Legitimate software accessing LSASS process for legitimate reason; update the whitelist
  with it
fields:
- ComputerName
- SubjectDomainName
- SubjectUserName
- ProcessName
- ProcessID
id: 4a1b6da0-d94f-4fc3-98fc-2d9cb9e5ee76
level: high
logsource:
  product: windows
  service: security
modified: 2021/11/09
references:
- https://cyberwardog.blogspot.com/2017/03/chronicles-of-threat-hunter-hunting-for_22.html
- https://www.slideshare.net/heirhabarov/hunting-for-credentials-dumping-in-windows-environment
status: experimental
tags:
- attack.credential_access
- attack.t1003
- car.2019-04-004
- attack.t1003.001
ruletype: SIGMA
