F-secure added descriptions for three new Symbian trojans found late monday. Drever.B, Drever.C and Skulls.F.

The Drever.B is a simplified version of Drever.A that attacks only Simworks Anti-Virus, it is likely that Drever.B is actually earlier case than Drever.A, but was found only later.

The Skulls.F is still under analysis, it is detected with generic detection from December 15th 2004, so it's a minor case.

The Drever.C is interesting case as in addition of attacking Kaspersky and Simworks Symbian Anti-Viruses, it also attacks F-Secure Mobile Anti-Virus. Drever.C tries to damage the bootloader and application binaries of F-Secure Mobile Anti-Virus. However, the F-Secure Mobile Anti-Virus has protection against any attempts to modify it's files so the attack will not succeed.

The hexedited files of Drever.C contain message for F-secure

FSECURE MUST DIE!!!!!!
Please, don't make new antiviruses for my viruses and I stop make
viruses for your antiviruses. My target is Simworks!
=)

You can try the F-Secure Mobile Antivirus for Symbian here

http://www.f-secure.com/estore/avmobile.shtml