Detection rules › Sigma
Metasploit Or Impacket Service Installation Via SMB PsExec
Detects usage of Metasploit SMB PsExec (exploit/windows/smb/psexec) and Impacket psexec.py by triggering on specific service installation
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | T1569.002 System Services: Service Execution |
| Lateral Movement | T1021.002 Remote Services: SMB/Windows Admin Shares, T1570 Lateral Tool Transfer |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Security-Auditing | 4697 | A service was installed in the system. |
Stages and Predicates
Stage 1: selection
ServiceFileName|re: '^%systemroot%\\[a-zA-Z]{8}\.exe$'
ServiceName|re: '(^[a-zA-Z]{4}$)|(^[a-zA-Z]{8}$)|(^[a-zA-Z]{16}$)'
ServiceStartType: 3
ServiceType: 0x10
Stage 2: not filter
ServiceName: PSEXESVC
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 |
|---|---|---|
ServiceFileName | regex_match |
|
ServiceName | eq |
|
ServiceName | regex_match |
|
ServiceStartType | eq |
|
ServiceType | eq |
|
Neighbors
Broader alternatives (more inclusive than this rule)
These rules match a superset of what this rule catches. They cover the same events plus more. Use them if you want wider coverage and can absorb more false positives.
- CobaltStrike Service Installations - Security (drops 4 filters this rule applies)
- Invoke-Obfuscation Obfuscated IEX Invocation - Security (drops 4 filters this rule applies)
- Meterpreter or Cobalt Strike Getsystem Service Installation - Security (drops 4 filters this rule applies)
- Service Installed By Unusual Client - Security (drops 4 filters this rule applies)