Detection rules › Sigma

PsExec Service Execution

Severity
medium
Author
Thomas Patzke, Romaissa Adjailia, Florian Roth (Nextron Systems)
Source
upstream

Detects launch of the PSEXESVC service, which means that this system was the target of a psexec remote execution

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation

Stages and Predicates

Stage 1: selection

or:
Image: 'C:\Windows\PSEXESVC.exe'
OriginalFileName: 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)