PowerShell Scripts Installed as Services

Status: test
Severity: high
Log source: product windows, service system
Author: oscd.community, Natalia Shornikova
Source: github.com/SigmaHQ/sigma

Detects powershell script installed as a Service

MITRE ATT&CK coverage

Tactic	Techniques
Execution	`T1569.002` System Services: Service Execution

Telemetry coverage

Provider	Record / event type
Service-Control-Manager	Event ID 7045: A service was installed in the system.

Rule body

title: PowerShell Scripts Installed as Services
id: a2e5019d-a658-4c6a-92bf-7197b54e2cae
status: test
description: Detects powershell script installed as a Service
references:
    - https://speakerdeck.com/heirhabarov/hunting-for-powershell-abuse
author: oscd.community, Natalia Shornikova
date: 2020-10-06
modified: 2022-12-25
tags:
    - attack.execution
    - attack.t1569.002
logsource:
    product: windows
    service: system
detection:
    selection:
        Provider_Name: 'Service Control Manager'
        EventID: 7045
        ImagePath|contains:
            - 'powershell'
            - 'pwsh'
    condition: selection
falsepositives:
    - Unknown
level: high

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    Provider_Name: 'Service Control Manager'
    EventID: 7045
    ImagePath|contains:
        - 'powershell'
        - 'pwsh'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`ImagePath`	match	`powershell` corpus 5 (sigma 5) `pwsh` corpus 2 (sigma 2)	`field:"ImagePath" kind:match`
`Provider_Name`	eq	`Service Control Manager` corpus 50 (sigma 50)	`field:"Provider_Name" kind:eq value:"Service Control Manager"`

PowerShell Scripts Installed as Services

MITRE ATT&CK coverage

Telemetry coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection

Indicators

Stage 0: `condition`

Stage 1: `selection`