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Detection rules › Sigma

PowerShell WMI Win32_Product Install MSI

Status
test
Severity
medium
Log source
product windows, category ps_script
Author
frack113
Source
github.com/SigmaHQ/sigma

Detects the execution of an MSI file using PowerShell and the WMI Win32_Product class

MITRE ATT&CK coverage

TacticTechniques
StealthT1218.007 System Binary Proxy Execution: Msiexec

Event coverage

ProviderEventTitle
PowerShellEvent ID 4104Creating Scriptblock text (MessageNumber of MessageTotal).

Rule body yaml

title: PowerShell WMI Win32_Product Install MSI
id: 91109523-17f0-4248-a800-f81d9e7c081d
status: test
description: Detects the execution of an MSI file using PowerShell and the WMI Win32_Product class
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1218.007/T1218.007.md
author: frack113
date: 2022-04-24
tags:
    - attack.stealth
    - attack.t1218.007
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection:
        ScriptBlockText|contains|all:
            - 'Invoke-CimMethod '
            - '-ClassName '
            - 'Win32_Product '
            - '-MethodName '
            - '.msi'
    condition: selection
falsepositives:
    - Unknown
level: medium

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    ScriptBlockText|contains|all:
        - 'Invoke-CimMethod '
        - '-ClassName '
        - 'Win32_Product '
        - '-MethodName '
        - '.msi'

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
  • -ClassName
  • -MethodName
  • .msi
  • Invoke-CimMethod
  • Win32_Product