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
At VB2018 in Montreal, Ixia researcher Stefan Tanase presented a thought-provoking paper on the current state of the Internet and the worrying tendency towards raising borders and restricting the flow of information. Today we publish both his paper…
The set-up of the VBSpam test lab gives us a unique insight into the kinds of emails that are more likely to bypass email filters. This week we look at the malspam that was missed: banking and email phishing, Emotet and Bushaloader.
The cybersecurity skills gap has been described as one of the biggest challenges facing IT leaders today. At VB2018 in Montreal, ESET's Lysa Myers outlined some of the things the industry can do to help address the problem. Today we publish Lysa's…
We look forward the Nullcon 2019 conference in Goa, India, at which VB Editor Martijn Grooten will give a talk on the state of malware.
We see a lot of spam in the VBSpam test lab, and we also see how well such emails are being blocked by email security products. Recently some of the emails that bypassed security products included a broken Amazon phishing campaign, a large fake UPS…