On January 25th a new backdoor known as Sadhound has been spammed in emails with subject 'I Miss You'. Sadhound is not a worm and does not spread by itself.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
Sadhound drops a text file in Windows Temp folder and opens it with Notepad. The text looks as follow:
There's no special reason for sending this to you, except that... I was feeling a little lonely, and when I asked myself what I seemed to be missing the most, the answer turned out to be ...you. I Miss You
F-Secure Anti-Virus detects Sadhound with the existing updates as a dropper.
Technical Details: Katrin Tocheva, Gergely Erdelyi F-Secure Corp.; January 27th, 2003