PowerShell WMI Win32_Product Install MSI

Status: test
Severity: medium
Log source: category ps_script, product windows
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

Tactic	Techniques
Stealth	`T1218.007` System Binary Proxy Execution: Msiexec

Telemetry coverage

Provider	Record / event type
PowerShell	Event ID 4104: Creating Scriptblock text (MessageNumber of MessageTotal).

Rule body

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

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`ScriptBlockText`	match	`-ClassName` `-MethodName` `.msi` `Invoke-CimMethod` `Win32_Product`	`field:"ScriptBlockText" kind:match`

PowerShell WMI Win32_Product Install MSI

MITRE ATT&CK coverage

Telemetry coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection

Indicators

Stage 0: `condition`

Stage 1: `selection`