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Description: Exchange Server Vulnerability *.Compiled Files | ||
Author: Dennis Reneau | ||
Version: 1.0 | ||
Id: e7dc72be-942c-4fef-aa45-252bf2364b1e | ||
RecreateDirectories: true | ||
Targets: | ||
- | ||
Name: Exchange Server Modified Compiled Files | ||
Category: Apps | ||
Path: C:\Windows\Microsoft.NET\Framework*\v*\Temporary ASP.NET Files\ | ||
Recursive: true | ||
FileMask: 'Regex:*.\b[a-zA-Z0-9_-]{8}\b.compiled' | ||
Comment: "Highly dependent on Exchange configuration" | ||
- | ||
Name: Exchange Server Modified Compiled Files | ||
Category: Apps | ||
Path: C:\inetpub\wwwroot\aspnet_client | ||
Recursive: true | ||
FileMask: 'Regex:*.\b[a-zA-Z0-9_-]{8}\b.compiled' | ||
Comment: "Highly dependent on Exchange configuration" | ||
- | ||
Name: Exchange Server Modified Compiled Files | ||
Category: Apps | ||
Path: C:\inetpub\wwwroot\aspnet_client\system_web\ | ||
Recursive: true | ||
FileMask: 'Regex:*.\b[a-zA-Z0-9_-]{8}\b.compiled' | ||
Comment: "Highly dependent on Exchange configuration" | ||
- | ||
Name: Exchange Server Modified Compiled Files | ||
Category: Apps | ||
Path: C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\owa\auth\ | ||
Recursive: true | ||
FileMask: 'Regex:*.\b[a-zA-Z0-9_-]{8}\b.compiled' | ||
Comment: "Highly dependent on Exchange configuration" | ||
|
||
# Documentation | ||
# Microsoft Exchange CVE-2021-26855 | ||
# Identified *.compound files are modified XML files associated with malicious dll's. | ||
# https://news.sophos.com/en-us/2021/03/05/hafnium-advice-about-the-new-nation-state-attack/ | ||
# Query for WebShell IOC's with randomized 8 character names preceding the .compiled file extension. |
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