Paper: Using .NET GUIDs to help hunt for malware

Posted by   Virus Bulletin on   Jun 24, 2015

Tool to extract identifiers incorporated into VirusTotal.

The large number of new malware samples found each day hasn't made malware analysis an easier task, and researchers could use anything that helps them automate this task.

Today, we publish a paper by Cylance researcher Brian Wallace, who looks at two globally unique identifiers (GUIDs) found in malware created using .NET, which can help link multiple files to the same Visual Studio project. He released a Python tool to safely extract these identifiers; the tool has since been incorporated into VirusTotal.

The idea for using these two GUIDs — MVID, which is unique to each build, and TypeLib ID, which is unique to each Visual Studio Project — came during research that was part of 'Operation Cleaver' late last year, where it greatly reduced the number of samples that needed to be reverse-engineered.

  Clusters of linked malware samples from the Operation Cleaver campaign.

Although the GUIDs can easily be extracted from executables, not all methods of doing so are safe; hence Brian has written a tool that does so securely and works cross-platform. The tool, GetNETGUIDs, has been published on Cylance's GitHub page.

The tool has since been incorporated into VirusTotal, where it can be used to search for files with the same MVID and/or TypeLib ID.

You can read the paper here in HTML format or here as a PDF. Remember that all content published by Virus Bulletin can be read free of charge, with no registration required.

  Virustotal search for a combination of the MVID and the TypeLib ID.

Posted on 24 June 2015 by Martijn Grooten
twitter.png
fb.png
linkedin.png
hackernews.png
reddit.png

 

Latest posts:

VB2021 localhost call for last-minute papers

The call for last-minute papers for VB2021 localhost is now open. Submit before 20 August to have your paper considered for one of the slots reserved for 'hot' research!

New article: Run your malicious VBA macros anywhere!

Kurt Natvig explains how he recompiled malicious VBA macro code to valid harmless Python 3.x code.

New article: Dissecting the design and vulnerabilities in AZORult C&C panels

In a new article, Aditya K Sood looks at the command-and-control (C&C) design of the AZORult malware, discussing his team's findings related to the C&C design and some security issues they identified.

VB2021 localhost call for papers: a great opportunity

VB2021 localhost presents an exciting opportunity to share your research with an even wider cross section of the IT security community around the world than usual, without having to take time out of your work schedule (or budget) to travel.

New article: Excel Formula/Macro in .xlsb?

In a follow-up to an article published last week, Kurt Natvig takes us through the analysis of a new malicious sample using the .xlsb file format.

We have placed cookies on your device in order to improve the functionality of this site, as outlined in our cookies policy. However, you may delete and block all cookies from this site and your use of the site will be unaffected. By continuing to browse this site, you are agreeing to Virus Bulletin's use of data as outlined in our privacy policy.