Just googled "mssecure.exe" and discovered it listed as a security threat on your site.
I can confirm that this is a trojan and uses a registry key in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run to start up.
It is not detected by my antivirus app (Norton 2005, fully updated) or my antispyware app (AdAware Personal, fully updated).
As far as I can tell, it is a spam-virus which runs its own mailserver. It's picked up by Norton if you have 'Scan outgoing emails' selected. In this case, Norton shows hundreds of emails going out, and returns any errors returned by the recieving SMTP servers - typically these are 'Your mail was rejected due to spam-like headers' or 'Mailbox does not exist' type messages.
I was going to run ethereal and try and pick up any extra info, but i'm not expert with this and besides, i just wanted rid of it :-)
I seem to have successfully removed it by ending the process, deleting the file and removing the registry entry. I have since restarted and it has not re-emerged, although it could still be running in a different guise.
Any further info on this thread would be appreciated, especially the reason why it is not listed in Symantec's latest virus definitions!!
Mod Edit: This will be moved to a more appropriate Forum.
Edited by scarlett, 28 March 2005 - 11:39 AM.