VB2018 paper: Unpacking the packed unpacker: reversing an Android anti-analysis library

Posted by   Martijn Grooten on   Jan 14, 2019

Though still relatively new (the first VB conference paper on Android malware was presented in 2011), malware targeting the Android mobile operating system has evolved quickly, in terms of both quantity and quality. Many of the characteristics of desktop malware are now also seen in Android malware – for example, the use of anti-analysis techniques, and the use of libraries for such techniques, is a sign of the commoditization of Android malware.

One such library was found in more than 5,000 Android malware samples, including newer variants of the Chamois ad fraud malware. In reference to its many layers, Google researcher Maddie Stone named the library 'WeddingCake'.

In a paper presented at VB2018 in Montreal, Maddie took apart the library and its many layers – an analysis which will be helpful not just to those who come across WeddingCake in their research, but also for those analysing similar libraries.

fig5-stone.jpg
The library checks if the Monkey application is running, which would indicate it is running inside an emulator.

Today, we published Maddie's paper in both HTML and PDF format. We have also uploaded the video of Maddie's talk to our YouTube channel.

A call for papers for VB2019 (London, 2-4 October) will open this week. Sponsor/partner opportunities for VB2019 - the most international threat intelligence conference - are now available.

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

 

Latest posts:

Haroon Meer and Adrian Sanabria to deliver VB2019 closing keynote

New additions to the VB2019 conference programme include a closing keynote address from Thinkst duo Haroon Meer and Adrian Sanabria and a talk on attacks against payment systems.

Free VB2019 tickets for students

Virus Bulletin is excited to announce that, thanks to generous sponsorship from Google Android, we are able to offer 20 free tickets to students who want to attend VB2019.

VB2018 paper: Lazarus Group: a mahjong game played with different sets of tiles

The Lazarus Group, generally linked to the North Korean government, is one of the most notorious threat groups seen in recent years. At VB2018 ESET researchers Peter Kálnai and Michal Poslušný presented a paper looking at the group's various…

Book your VB2019 ticket now for a chance to win a ticket for BSides London

Virus Bulletin is proud to sponsor this year's BSides London conference, which will take place next week, and we have a number of tickets to give away.

First 11 partners of VB2019 announced

We are excited to announce the first 11 companies to partner with VB2019, whose support will help ensure a great event.

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.