Virus type: Trojan
Destructive: No
Aliases: Trojan.Win32.MSNFlooder.28672, Flooder.MSN.VB.ac, Flooder:Win32/MSN.VB.AC, FDoS-MassMsg
This non-memory resident Trojan may arrive on a target system as the file WIN.SCR. It contains no propagation routine and needs to be run manually.
It sends the message ?win? via the IM Message window popup to all entries found in the Windows or MSN Messenger contact list of a target user.
This Trojan has been tested to successfully send an IM message on Windows 2000. On Windows XP, however, it fails to perform its intended function due to programming errors.
It is written in Visual Basic and runs on Windows 95, 98, ME, NT, 2000, and XP.
http://www.trendmicro.com/vinfo/virusencyclo/default5.asp?VName=TROJ_MSNMASMSG.A

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