Detection rules › Sigma

Suspicious Interactive PowerShell as SYSTEM

Severity
high
Author
Florian Roth (Nextron Systems)
Source
upstream

Detects the creation of files that indicator an interactive use of PowerShell in the SYSTEM user context

MITRE ATT&CK coverage

TacticTechniques
ExecutionT1059.001 Command and Scripting Interpreter: PowerShell

Event coverage

ProviderEvent IDTitle
Sysmon11FileCreate

Stages and Predicates

Stage 1: selection

TargetFilename: ['C:\Windows\System32\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive', 'C:\Windows\System32\config\systemprofile\AppData\Roaming\Microsoft\Windows\PowerShell\PSReadLine\ConsoleHost_history.txt']

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
TargetFilenameeq
  • C:\Windows\System32\config\systemprofile\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive
  • C:\Windows\System32\config\systemprofile\AppData\Roaming\Microsoft\Windows\PowerShell\PSReadLine\ConsoleHost_history.txt