detection.wiki

Detection rules › Sigma

Powershell XML Execute Command

Severity
medium
Author
frack113
Source
upstream

Adversaries may abuse PowerShell commands and scripts for execution. PowerShell is a powerful interactive command-line interface and scripting environment included in the Windows operating system. (Citation: TechNet PowerShell) Adversaries can use PowerShell to perform a number of actions, including discovery of information and execution of code

MITRE ATT&CK coverage

TacticTechniques
ExecutionT1059.001 Command and Scripting Interpreter: PowerShell

Event coverage

ProviderEvent IDTitle
PowerShell4104Creating Scriptblock text (MessageNumber of MessageTotal).

Stages and Predicates

Stage 1: all of selection_xml

ScriptBlockText|contains: .Load
ScriptBlockText|contains: New-Object
ScriptBlockText|contains: System.Xml.XmlDocument

Stage 2: all of selection_exec

or:
ScriptBlockText|contains: 'ICM -'
ScriptBlockText|contains: 'IEX '
ScriptBlockText|contains: 'Invoke-Command '
ScriptBlockText|contains: 'Invoke-Expression '

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
ScriptBlockTextmatch
  • .Load
  • ICM -
  • IEX
  • Invoke-Command
  • Invoke-Expression
  • New-Object corpus 6 (sigma 6)
  • System.Xml.XmlDocument

Neighbors

Broader alternatives (more inclusive than this rule)

These rules match a superset of what this rule catches. They cover the same events plus more. Use them if you want wider coverage and can absorb more false positives.