Detection rules › Sigma

PUA - RunXCmd Execution

Severity
high
Author
Florian Roth (Nextron Systems)
Source
upstream

Detects the use of the RunXCmd tool to execute commands with System or TrustedInstaller accounts

MITRE ATT&CK coverage

TacticTechniques
ExecutionT1569.002 System Services: Service Execution

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation
Security-Auditing4688A new process has been created.

Stages and Predicates

Stage 1: all of selection_account

or:
CommandLine|contains: ' /account=system '
CommandLine|contains: ' /account=ti '

Stage 2: all of selection_exec

CommandLine|contains: '/exec='

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
CommandLinematch
  • /account=system
  • /account=ti
  • /exec=