Detection rules › Sigma

Renamed PsExec Service Execution

Severity
high
Author
Florian Roth (Nextron Systems)
Source
upstream

Detects suspicious launch of a renamed version of the PSEXESVC service with, which is not often used by legitimate administrators

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation

Stages and Predicates

Stage 1: selection

OriginalFileName: psexesvc.exe

Stage 2: not filter

Image: 'C:\Windows\PSEXESVC.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.

FieldKindValues
Imageeq
  • C:\Windows\PSEXESVC.exe corpus 2 (sigma 2)
OriginalFileNameeq
  • psexesvc.exe corpus 3 (sigma 3)