Detection rules › Sigma
PowerShell Profile Modification
Detects the creation or modification of a powershell profile which could indicate suspicious activity as the profile can be used as a mean of persistence
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Persistence | T1546.013 Event Triggered Execution: PowerShell Profile |
| Privilege Escalation | T1546.013 Event Triggered Execution: PowerShell Profile |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 11 | FileCreate |
Rule body yaml
title: PowerShell Profile Modification
id: b5b78988-486d-4a80-b991-930eff3ff8bf
status: test
description: Detects the creation or modification of a powershell profile which could indicate suspicious activity as the profile can be used as a mean of persistence
references:
- https://www.welivesecurity.com/2019/05/29/turla-powershell-usage/
- https://persistence-info.github.io/Data/powershellprofile.html
author: HieuTT35, Nasreddine Bencherchali (Nextron Systems)
date: 2019-10-24
modified: 2023-10-23
tags:
- attack.persistence
- attack.privilege-escalation
- attack.t1546.013
logsource:
product: windows
category: file_event
detection:
selection:
TargetFilename|endswith:
- '\Microsoft.PowerShell_profile.ps1'
- '\PowerShell\profile.ps1'
- '\Program Files\PowerShell\7-preview\profile.ps1'
- '\Program Files\PowerShell\7\profile.ps1'
- '\Windows\System32\WindowsPowerShell\v1.0\profile.ps1'
- '\WindowsPowerShell\profile.ps1'
condition: selection
falsepositives:
- System administrator creating Powershell profile manually
level: medium
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
TargetFilename|endswith:
- '\Microsoft.PowerShell_profile.ps1'
- '\PowerShell\profile.ps1'
- '\Program Files\PowerShell\7-preview\profile.ps1'
- '\Program Files\PowerShell\7\profile.ps1'
- '\Windows\System32\WindowsPowerShell\v1.0\profile.ps1'
- '\WindowsPowerShell\profile.ps1'
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.
| Field | Kind | Values |
|---|---|---|
TargetFilename | ends_with |
|