User Couldn't Call a Privileged Service 'LsaRegisterLogonProcess'

Severity: high
Author: Roberto Rodriguez (source), Ilyas Ochkov (rule), oscd.community
Source: upstream

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.

MITRE ATT&CK coverage

Tactic	Techniques
Credential Access	`T1558.003` Steal or Forge Kerberos Tickets: Kerberoasting

Event coverage

Provider	Event ID	Title
Security-Auditing	4673	A privileged service was called.

Stages and Predicates

Stage 1: `selection`

Keywords: 0x8010000000000000
Service: 'LsaRegisterLogonProcess()'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.