Four new Trojans are doing the rounds, one of which is directed at PCs, and the other three concerning mobile phones. Bootton.E, Pbstealer.D and Sendtool.A, the phone Trojans, have quite a low infection rate at present. Bootton.E restarts the mobile but also releases corrupted components that cause a reboot to fail, rendering the phone unusable. Pbstealer.D, on the other hand, sends an infected user's contact list, notepad and calendar to-do list to other nearby users via Bluetooth. How isn’t that potentially embarrassing? Sendtool.A sends malicious programs such as the Pbstealer Trojan to other devices via Bluetooth.

Fortunately, the worms are unlikely to spread very far. "They don't spread quickly because they're not purely autonomous," said Ollie Whitehause, a researcher with Symantec. Unlike worms on computers, the Trojan horses hitting cell phones spread as attachments that require users to download them.
Nyxem is the PC worm. Unlike the mobile phone malware, Nyxem is spreading rapidly and carries a potentially destructive set of instructions.

Also nicknamed the Kama Sutra worm, it is programmed to overwrite all of the files on computers it infects on 3 February, said Mikko Hypponen, chief research officer at F-Secure Corp.