Infected systems seem to reprogram the flash controllers on USB sticks (and cd drives, more on that later) to attack the system (bios?). There are only like ten different kinds of flash controllers used in all the different brands of memory sticks and all of them are reprogrammable, so writing a generic attack is totally feasible. Coincidentally the only sites I've found with flash controller reset software, are .ru sites, and seem to 404 on infected systems.
The tell is still that #badBIOS systems refuse to boot CDs (this is across all oses, including my Macs) there are other more esoteric problems with partition tables and devices on infected systems. Also USB cd drives are affected, I've bricked a few plugging and unplugging them too fast (presumably as they were being reflashed) on infected systems. Unsafely ejecting USB memory sticks has also bricked them a few times on #badBIOS systems for clean systems, though mysteriously they are "fixed" and reset by just simply replugging them into an infected system. Extracting data from infected systems is VERY tricky. Yesterday I watched as the malware modified some files on a cd I was burning to extract data from an infected system, don't know what it was yet, I have to set up a system to analyze that stuff.
On windows my current suspicion is that they use font files to get up to some nastiness, I found 246 extra ttf and 150 fon files on a cleanly installed windows 8 system, and three stand out, meiryo, meiryob, and malgunnb, that are 8mb, instead of the 7 and 4mb sizes one would expect. Unfortunately ttf files are executable and windows "previews" them... These same files are locked by trusted installer and inaccessible to users and administrators on infected systems, and here comes the wierd part, they mysteriously disappeared from the cd I tried to burn on a completely new system (a laptop that hadn't been used in a few years) that my friend brought over which had just been freshly installed with win 8.1 from msdn, with the install media checksum verified on another system.
I'm still analyzing, but I'm certain we'll ALL have a large problem here. I have more data and info I can share with folks that are interested.
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