Older versions of Qbot contained multiple malicious modules as embedded resources, but recent versions were rather clean.Įach of these bots will forward the traffic to the real CC server or to a second-tier proxy as we will show later. The latest versions have implemented several typical malware components to reduce its visibility and toughen its analysis.īased on that information, the server decides whether is safe to push modules to the victim. In order to successfully analyze the malware and its components, we had to automate the decryption process for all the variants. That field can be changed via timestomping, but we suspect that it wasnt forged in these cases. The fact that the developers left a version tag marked in the samples, allowed us to perform this analysis easier. In previous campaigns, the infection chain started with a Word document containing malicious macros.īig files are usually dismissed by various sandboxes due to performance limitations.Ĭreated an extraction script that can be accessed in Appendix B. Those conversations could be captured using Qbots Email Collector module which we will describe later. One of these is called Hijacked Email Threads capturing archived email conversations and replying to the sender with the malicious content. The method is less sophisticated than spear-phishing techniques but has additional attributes which add to its credibility. These stolen emails are then utilized for future malspam campaigns, making it easier for users to be tricked into clicking on infected attachments because the spam email appears to continue an existing legitimate email conversation.Ĭheck Points researchers have seen examples of targeted, hijacked email threads with subjects related to Covid-19, tax payment reminders, and job recruitments. One of Qbots new tricks is particularly nasty, as once a machine is infected, it activates a special email collector module which extracts all email threads from the victims Outlook client, and uploads it to a hardcoded remote server. Some of these campaigns included installing an updated version of Qbot on victims PCs. We assumed that the campaign was stopped to allow those behind QBot to conduct further malware development, but we did not imagine that it would return so quickly. It has become the malware equivalent of a Swiss Army knife, capable of. It is highly structured, multi-layered, and is being continuously developed with new features to extend its capabilities.These new tricks mean that despite its age, Qbot is still a dangerous and persistent threat to organizations. The malware, which has also been dubbed Qakbot and Pinkslipbot, was discovered in 2008 and is known for collecting browsing data and stealing banking credentials and other financial information from victims. To make it easier understanding the logic, we will show only the decrypted network data. Me And Rbc My Information Updater By derasota1971 Follow | Public
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