VB2014 paper: Caphaw - the advanced persistent pluginer

Posted by   Virus Bulletin on   Feb 27, 2015

Micky Pun and Neo Tan analyse the banking trojan that is best known for spreading through Skype.

Since the close of the VB2014 conference in Seattle in October, we have been sharing VB2014 conference papers as well as video recordings of the presentations. Today, we have added 'Caphaw - the advanced persistent pluginer' by Fortinet researchers Micky Pun and Neo Tan.

Caphaw (also known as Shylock) is a bit of a rarity among today's botnets: its source code hasn't been leaked and the malware has never been offered for sale on underground forums, suggesting that the same group of people wrote the code and maintained the botnet.

Other than that, the banking trojan shows many similarities with other modern malware families: from anti-analysis techniques to the possibility of extending the malware by using plug-ins.

  An overview of Caphaw; click for larger.

Today, we publish a VB2014 paper from Fortinet researchers Micky Pun and Neo Tan, in which they take a close look at Caphaw. They look at how the malware communicates with its command and control server and at the malware's configuration file as well as at its various plug-ins, most famous among which is one that helps the malware spread through Skype chats.

The story of Caphaw (and Micky and Neo's presentation) ends on a positive note: in June 2014 the botnet disappeared off the radar. It seems that this was thanks to a coordinated action led by the UK's National Crime Agency against the botnet's infrastructure. However, no arrests were made.

You can read Micky and Neo's paper on Caphaw here in HTML-format, or download it here as a PDF (no registration or subscription required). We have also uploaded the presentation to our YouTube channel.

Those interested in the Skype module should also read an article Micky and Neo's colleague Raul Alvarez wrote for Virus Bulletin two years ago, in which he looks at this module. Caphaw/Shylock was also studied in another VB2014 paper, by Sophos's James Wyke, who looked at decoy behaviour performed by malware upon sandbox detection.

Posted on 27 February 2015 by Martijn Grooten

twitter.png
fb.png
linkedin.png
hackernews.png
reddit.png

 

Latest posts:

VB2019 conference programme announced

VB is excited to reveal the details of an interesting and diverse programme for VB2019, the 29th Virus Bulletin International Conference, which takes place 2-4 October in London, UK.

VB2018 paper: Under the hood - the automotive challenge

Car hacking has become a hot subject in recent years, and at VB2018 in Montreal, Argus Cyber Security's Inbar Raz presented a paper that provides an introduction to the subject, looking at the complex problem, examples of car hacks, and the…

VB2018 paper and video: Android app deobfuscation using static-dynamic cooperation

Static analysis and dynamic analysis each have their shortcomings as methods for analysing potentially malicious files. Today, we publish a VB2018 paper by Check Point researchers Yoni Moses and Yaniv Mordekhay, in which they describe a method that…

VB2019 call for papers closes this weekend

The call for papers for VB2019 closes on 17 March, and while we've already received many great submissions, we still want more!

Registration open for VB2019 ─ book your ticket now!

Registration for VB2019, the 29th Virus Bulletin International Conference, is now open, with an early bird rate available until 1 July.

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.