Point-of-sale malware is popular among attackers, as it usually leads to them obtaining credit card numbers and immediately use that information for financial gain. This type of malware is generally deployed on retailers' websites and retail point-of-sale locations with the goal of tracking customers' payment information. If they successfully obtain credit card details, they can use either the proceeds from the sale of that information or use the credit card data directly to obtain additional exploits and resources for other malware. Point-of-sale terminals are often forgotten about in terms of segregation and can represent a soft target for attackers. Cisco Talos recently discovered a new PoS malware that the attackers are selling on a crimeware forum. Our researchers also discovered the associated payloads with the malware, its infrastructure and control panel. We assess with high confidence that this is not the first malware developed by this actor. A few years ago, they were also pushing the DiamondFox L!NK botnet. Known as "GlitchPOS," this malware is also being distributed on alternative websites at a higher price than the original.
A packer developed in VisualBasic protects this malware. It's, on the surface, a fake game. The user interface of the main form (which is not displayed at the execution) contains various pictures of cats:
The purpose of the packer is to decode a library that's the real payload encoded with the UPX packer. Once decoded, we gain access to GlitchPOS, a memory grabber developed in VisualBasic.
The payload is small and contains only a few functions. It can connect to a command and control (C2) server to:
- Register the infected systems
- Receive tasks (command execution in memory or on disk)
- Exfiltrate credit card numbers from the memory of the infected system
- Update the exclusion list of scanned processes
- Update the "encryption" key
- Update the User Agent
- Clean itself
GlitchPOS Samples :