Chinese security firm Qihoo 360 Netlab said it partnered with tech giant Baidu to disrupt a malware botnet infecting over hundreds of thousands of systems.
The botnet was traced back to a group it calls ShuangQiang (also called Double Gun), which has been behind several attacks since 2017 aimed at compromising Windows computers with MBR and VBR bootkits, and installing malicious drivers for financial gain and hijack web traffic to e-commerce sites.
In addition to using images uploaded to Baidu Tieba to distribute configuration files and malware — a technique called steganography — the group has begun using Alibaba Cloud storage to host configuration files and Baidu’s analytics platform Tongji to manage the activity of its infected hosts, the researchers said.
The initial compromise relies on luring unsuspecting users to install game launching software from sketchy game portals that contain malicious code under the guise of a patch.
Once the user downloads and installs the patch, it accesses the aforementioned configuration information to download a separate program named “cs.dll” from Baidu Tieba that’s stored as an image file.
In the subsequent stages, “cs.dll” not only…
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