Yes, this is indeed the latest threat. Came across one recently and finally solved it;
At first i cleaned a customers laptop from virusses and spyware with all the usual progams (combofix, mbam, roguekiller, otl, KAV resue disk, msert, rootrepeal, gmer, aswmbr, tdsskiller, emsisoft kit, etc), but after 2 reboots the virus had infected autochk.exe again.
I finally got a bit desparate
and reinstalled Vista through the recovery partition (it's an asus laptop K50IN series). Guess what, 2 reboots and Combofix reported that autochk.exe was infected again!!
The laptop is in a tightly secured LAN and hacks through a $ADMIN share can be excluded.
Now i got even more desparate
) I ended up deleting all partitions on the disk and did a clean install with my official vista DVD. And again, 2 reboots later the laptop was infected again!
I then repeated this with a brand new harddisk and an install from an official DVD but still the virus came back.
So: Brand new harddisk, official Vista DVD, no usb sticks or whatever in the laptop and still after 2 reboots Combofix reported autochk.exe as infected.
At this point i was left with 2 possible causes; Either Combofix reported a virus incorrectly or the machine was infected through bios. Now i highly trust Combofix and on the other hand a bios virus has last been seen by me back in 1999 (tsjernobyl virus).
So i took out the infected disk, downloaded the latest bios on a clean PC and saved it on a new usb stick. Booted the infected laptop and went into the bios (with F2 key), started the Easy Flash utily from there and flashed the bios. I attached the infected disk as a usb disk to a clean computer and removed all partitions. Next i placed the empty disk into the laptop and reinstalled Vista from DVD.
The laptop has been fully installed now (all updates and software needed) and i've again scanned it with all programs mentioned before. And now it's finally clean and it stays clean, no matter how many reboots
My conclusion is that the laptop was indeed infected with a bios virus, in a very very sophisticated way.
Just wanted to share this with you
cause bios virusses are rare and undetectable themselves. if you want more info feel free to e-mail me.