AWL Bypass with Winrm.vbs and Malicious WsmPty.xsl/WsmTxt.xsl - File
Detects execution of attacker-controlled WsmPty.xsl or WsmTxt.xsl via winrm.vbs and copied cscript.exe (can be renamed)
Detection logic
system_files
TargetFilename|endswith:
- WsmPty.xsl
- WsmTxt.xslin_system_folder
TargetFilename|startswith:
- C:\Windows\System32\
- C:\Windows\SysWOW64\Condition
system_files and not in_system_folderRaw YAML
title: AWL Bypass with Winrm.vbs and Malicious WsmPty.xsl/WsmTxt.xsl - File
id: d353dac0-1b41-46c2-820c-d7d2561fc6ed
related:
- id: 074e0ded-6ced-4ebd-8b4d-53f55908119d
type: derived
status: test
description: Detects execution of attacker-controlled WsmPty.xsl or WsmTxt.xsl via winrm.vbs and copied cscript.exe (can be renamed)
references:
- https://posts.specterops.io/application-whitelisting-bypass-and-arbitrary-unsigned-code-execution-technique-in-winrm-vbs-c8c24fb40404
author: Julia Fomina, oscd.community
date: 2020-10-06
modified: 2022-11-28
tags:
- attack.stealth
- attack.t1216
logsource:
product: windows
category: file_event
detection:
system_files:
TargetFilename|endswith:
- 'WsmPty.xsl'
- 'WsmTxt.xsl'
in_system_folder:
TargetFilename|startswith:
- 'C:\Windows\System32\'
- 'C:\Windows\SysWOW64\'
condition: system_files and not in_system_folder
falsepositives:
- Unlikely
level: mediumFalse positives
- Unlikely