Detection rules › Sigma
Suspicious PsExec Execution
detects execution of psexec or paexec with renamed service name, this rule helps to filter out the noise if psexec is used for legit purposes or if attacker uses a different psexec client other than sysinternal one
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Lateral Movement | T1021.002 Remote Services: SMB/Windows Admin Shares |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Security-Auditing | 5145 | A network share object was checked to see whether client can be granted desired access. |
Stages and Predicates
Stage 1: selection1
or:
RelativeTargetName|endswith: -stderr
RelativeTargetName|endswith: -stdin
RelativeTargetName|endswith: -stdout
ShareName: '\\\\\*\\IPC$'
Stage 2: not filter
RelativeTargetName|startswith: 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 |
|---|---|---|
RelativeTargetName | ends_with |
|
RelativeTargetName | starts_with |
|
ShareName | 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.
- Transferring Files with Credential Data via Network Shares (drops 2 filters this rule applies)
- First Time Seen Remote Named Pipe (drops 1 filter this rule applies)