We started to get reports about a new dropper for Sober.S worm at noon on October 6th, 2005. This dropper drops exactly the same Sober.S variant that started to spread early in the morning. When the dropper is run, it shows a messagebox as a decoy:
The description of Sober.S worm can be found here:
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
The dropper for Sober.S worm is detected with the following F-Secure Anti-Virus updates:
Description Created: Alexey Podrezov; October 6th, 2005