NEW VIRUS ALERT
[Priority Level - High]
W32.Blaster.Worm is a worm that exploits the DCOM RPC vulnerability (described in Microsoft Security Bulletin MS03-026) using TCP port 135. This worm attempts to download the msblast.exe file to the %WinDir%\system32 directory and execute it.
Block access to TCP port 4444 at the firewall level, and then block the following ports, if they do not use the applications listed:
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TCP Port 135, "DCOM RPC"
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UDP Port 69, "TFTP"
The worm also attempts to perform a Denial of Service (DoS) on Windows Update. This is an attempt to prevent you from applying a patch on your computer against the DCOM RPC vulnerability.
Precautionary measures, update your virus definations regularly and do not download files which you are not sure of.
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