User Couldn't Call a Privileged Service 'LsaRegisterLogonProcess'

The 'LsaRegisterLogonProcess' function verifies that the application making the function call is a logon process by checking that it has the SeTcbPrivilege privilege set. Possible Rubeus tries to get a handle to LSA.

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Detection logic

selection

EventID: 4673
Service: LsaRegisterLogonProcess()
Keywords: "0x8010000000000000"

Condition

selection

Raw YAML

title: User Couldn't Call a Privileged Service 'LsaRegisterLogonProcess'
id: 6daac7fc-77d1-449a-a71a-e6b4d59a0e54
status: test
description: The 'LsaRegisterLogonProcess' function verifies that the application making the function call is a logon process by checking that it has the SeTcbPrivilege privilege set. Possible Rubeus tries to get a handle to LSA.
references:
    - https://posts.specterops.io/hunting-in-active-directory-unconstrained-delegation-forests-trusts-71f2b33688e1
author: Roberto Rodriguez (source), Ilyas Ochkov (rule), oscd.community
date: 2019-10-24
modified: 2022-12-25
tags:
    - attack.credential-access
    - attack.lateral-movement
    - attack.privilege-escalation
    - attack.t1558.003
logsource:
    product: windows
    service: security
detection:
    selection:
        EventID: 4673
        Service: 'LsaRegisterLogonProcess()'
        Keywords: '0x8010000000000000'     # failure
    condition: selection
falsepositives:
    - Unknown
level: high