PowerShell Scripts Installed as Services - Security

Status: test
Severity: high
Log source: product windows, service security
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
Security-Auditing	Event ID 4697: A service was installed in the system.

Rule body

title: PowerShell Scripts Installed as Services - Security
id: 2a926e6a-4b81-4011-8a96-e36cc8c04302
related:
    - id: a2e5019d-a658-4c6a-92bf-7197b54e2cae
      type: derived
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: 2022-11-29
tags:
    - attack.execution
    - attack.t1569.002
logsource:
    product: windows
    service: security
    definition: The 'System Security Extension' audit subcategory need to be enabled to log the EID 4697
detection:
    selection:
        EventID: 4697
        ServiceFileName|contains:
            - 'powershell'
            - 'pwsh'
    condition: selection
falsepositives:
    - Unknown
level: high

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    EventID: 4697
    ServiceFileName|contains:
        - 'powershell'
        - 'pwsh'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`ServiceFileName`	match	`powershell` corpus 4 (sigma 4) `pwsh`	`field:"ServiceFileName" kind:match`

PowerShell Scripts Installed as Services - Security

MITRE ATT&CK coverage

Telemetry coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection

Indicators

Stage 0: `condition`

Stage 1: `selection`