W32.Witty.Worm Discovered on: March 20, 2004 Last Updated on: March 21, 2004 09:55:11 AM W32.Witty.Worm utilizes a Vulnerability in ICQ Parsing by ISS Products. The worm sends itself out to multiple IP addresses on source port 4000/UDP and a random destination port. The worm is a memory-only based threat and does not create files on the system. The worm has a payload of overwriting random sectors of a random hard disk. NOTE: If your system is not running a vulnerable version of one of the products affected, then you will not be infected. Products affected by this vulnerability are listed below: BlackICE™ Agent for Server 3.6 ebz, ecd, ece, ecf BlackICE PC Protection 3.6 cbz, ccd, ccf BlackICE Server Protection 3.6 cbz, ccd, ccf RealSecure® Network 7.0, XPU 22.4 and 22.10 RealSecure Server Sensor 7.0 XPU 22.4 and 22.10 RealSecure Desktop 7.0 ebf, ebj, ebk, ebl RealSecure Desktop 3.6 ebz, ecd, ece, ecf RealSecure Guard 3.6 ebz, ecd, ece, ecf RealSecure Sentry 3.6 ebz, ecd, ece, ecf If you are running a product that has the vulnerability used by the worm, we recommend that you apply the relevant patch as soon as possible. Patches for this vulnerability are available at http://blackice.iss.net/update_center/index.php. Symantec Security Response recommends that administrators block inbound and outbound traffic to their networks on source port 4000/UDP. Please note that the destination port for traffic generated by the worm is selected randomly.