Authored by: Subrat Sarkar, Arunpreet Singh, and Clemens Kolbitsch
Diving deeply into the ModPOS malware framework using sandbox process snapshotting
Point-of-sale (POS) systems are amongst the most valuable targets for attackers today: with direct access to systems processing payment information, miscreants are able to circumvent any encryption between point-of-sale devices and the payment processor, allowing them to spy on - or even tamper with - sensitive payment information.
With ModPOS malware authors have developed a system that not only compromises payment processes at the origin device, but, at the same time, it does so from the kernel of these systems, well outside the reach of most security solutions.
As we will describe in this post, the ModPOS malware is much more than a system for compromising POS systems: it is a versatile framework that allows an attacker to leverage a practically unlimited range of tools to interfere with a compromised system. Even more, this malware works on any 32-bit Microsoft Windows system (many POS systems on the market today are still running on Microsoft Windows XP) allowing to use this malware on more than just POS systems.