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75 lines
2.4 KiB
YAML
75 lines
2.4 KiB
YAML
title: Generic Password Dumper Activity on LSASS
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id: 4a1b6da0-d94f-4fc3-98fc-2d9cb9e5ee76
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description: Detects process handle on LSASS process with certain access mask
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status: experimental
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author: Roberto Rodriguez, Teymur Kheirkhabarov, Dimitrios Slamaris, Mark Russinovich, Aleksey Potapov, oscd.community (update)
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date: 2019/11/01
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modified: 2021/04/19
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references:
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- https://cyberwardog.blogspot.com/2017/03/chronicles-of-threat-hunter-hunting-for_22.html
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- https://www.slideshare.net/heirhabarov/hunting-for-credentials-dumping-in-windows-environment
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tags:
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- attack.credential_access
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- attack.t1003 # an old one
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- car.2019-04-004
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- attack.t1003.001
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logsource:
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product: windows
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service: security
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detection:
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selection_1:
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EventID: 4656
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ObjectName|endswith: '\lsass.exe'
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AccessMask|contains:
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- '0x40'
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- '0x1400'
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- '0x1000'
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- '0x100000'
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- '0x1410' # car.2019-04-004
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- '0x1010' # car.2019-04-004
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- '0x1438' # car.2019-04-004
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- '0x143a' # car.2019-04-004
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- '0x1418' # car.2019-04-004
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- '0x1f0fff'
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- '0x1f1fff'
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- '0x1f2fff'
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- '0x1f3fff'
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selection_2:
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EventID: 4663
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ObjectName|endswith: '\lsass.exe'
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AccessList|contains:
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- '4484'
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- '4416'
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filter1:
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ProcessName|endswith:
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- '\wmiprvse.exe'
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- '\taskmgr.exe'
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- '\procexp64.exe'
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- '\procexp.exe'
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- '\lsm.exe'
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- '\csrss.exe'
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- '\wininit.exe'
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- '\vmtoolsd.exe'
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- '\minionhost.exe' # Cyberreason
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- '\VsTskMgr.exe' # McAfee Enterprise
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- '\thor64.exe' # THOR
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ProcessName|startswith:
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- C:\Windows\System32\
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- C:\Windows\SysWow64\
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- C:\Windows\SysNative\
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- C:\Program Files\
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- C:\Windows\Temp\asgard2-agent\
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filter2:
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ProcessName|startswith:
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- 'C:\Program Files' # too many false positives with legitimate AV and EDR solutions
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condition: selection_1 or selection_2 and not filter1 and not filter2
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fields:
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- ComputerName
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- SubjectDomainName
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- SubjectUserName
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- ProcessName
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- ProcessID
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falsepositives:
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- Legitimate software accessing LSASS process for legitimate reason; update the whitelist with it
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level: high
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