Phoenix Studio
Convert indexed Sigma rules into analyst-ready detections.
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Indexed Rules
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CLI Versions
10
Newest: 2.0.2
Translation Workspace
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Active Rule
Potential Persistence Via PowerShell User Profile Using Add-Content
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Potential Persistence Via PowerShell User Profile Using Add-Content
Using Splunk · Default · sigma-cli 2.0.2
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
BackendSplunkFormatDefaultVersion2.0.2
title: Potential Persistence Via PowerShell User Profile Using Add-Content
id: 05b3e303-faf0-4f4a-9b30-46cc13e69152
status: test
description: Detects calls to "Add-Content" cmdlet in order to modify the content of the user profile and potentially adding suspicious commands for persistence
references:
- https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1546.013/T1546.013.md
author: frack113, Nasreddine Bencherchali (Nextron Systems)
date: 2021-08-18
modified: 2023-05-04
tags:
- attack.persistence
- attack.privilege-escalation
- attack.t1546.013
logsource:
product: windows
category: ps_script
definition: 'Requirements: Script Block Logging must be enabled'
detection:
selection_add:
ScriptBlockText|contains: 'Add-Content $profile'
selection_options:
ScriptBlockText|contains:
# Note: You can add more suspicious values
- '-Value "IEX '
- '-Value "Invoke-Expression'
- '-Value "Invoke-WebRequest'
- '-Value "Start-Process'
- "-Value 'IEX "
- "-Value 'Invoke-Expression"
- "-Value 'Invoke-WebRequest"
- "-Value 'Start-Process"
condition: all of selection_*
falsepositives:
- Legitimate administration and tuning scripts that aim to add functionality to a user PowerShell session
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/windows/powershell/powershell_script/posh_ps_user_profile_tampering.yml