Detection rules › Sigma

Sysinternals PsService Execution

Severity
medium
Author
Nasreddine Bencherchali (Nextron Systems)
Source
upstream

Detects usage of Sysinternals PsService which can be abused for service reconnaissance and tampering

MITRE ATT&CK coverage

TacticTechniques
PersistenceT1543.003 Create or Modify System Process: Windows Service
Privilege EscalationT1543.003 Create or Modify System Process: Windows Service

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation

Stages and Predicates

Stage 1: selection

or:
Image|endswith: '\PsService.exe'
Image|endswith: '\PsService64.exe'
OriginalFileName: psservice.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
Imageends_with
  • \PsService.exe corpus 3 (sigma 3)
  • \PsService64.exe corpus 3 (sigma 3)
OriginalFileNameeq
  • psservice.exe corpus 2 (sigma 2)