By Andrew Brandt
Phishing Trojans that try to remain below the radar are still prevalent, but a number of files coming through Threat Research point to a disturbing trend: Several new variants of existing malware families are taking a scorched earth approach to infected computers, rendering the PC unbootable (just check out the batch file at left for just one egregious example) once the malware has retrieved whatever data it’s trying to steal, or deliberately crashing it, repeatedly, if you try to remove it.
Since the middle of last year, we’ve seen a sprinkling of malware that also wipes out key files on the hard drive, sometimes preventing a reboot, after an infection. This isn’t hostageware, which overtly threatens to delete the contents of the hard drive if you don’t pay up, but something more sinister.
In some cases, the crashes we saw were the result of poor coding by the malware author. But increasingly it appears that this behavior is deliberate, and occurs without warning. And this unfortunate trend appears to be getting worse, leaving a raft of perplexed, angry victims unable to use their computers in the wake of an infection.