Detection rules › Sigma
Suspicious Userinit Child Process
Detects a suspicious child process of userinit
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Privilege Escalation | T1055 Process Injection |
| Defense Evasion | T1055 Process Injection |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 1 | Process creation |
Stages and Predicates
Stage 1: selection
ParentImage|endswith: '\userinit.exe'
Stage 2: not 1 of filter_main_*
or:
CommandLine: 'C:\Windows\Explorer.EXE'
CommandLine|contains: '\netlogon\'
Image|endswith: '\explorer.exe'
Image: null
OriginalFileName: explorer.exe
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.
| Field | Kind | Values |
|---|---|---|
CommandLine | eq |
|
CommandLine | match |
|
Image | ends_with |
|
OriginalFileName | eq |
|
ParentImage | ends_with |
|