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Virus Name  : W32.SQLSlammer.Worm

Alias             : W32.SQLExp.Worm, SQL Slammer Worm, DDOS.SQLP1434.A

Virus type    : Internet worm

Threat level : Medium

Virus details :

                     SQLSlammer is an Internet worm spreads using a buffer overflow hole in Microsoft SQL server 2000 and Microsoft Desktop Engine (MSDE) 2000. The worm uses UDP 1434 to infect unpatched SQL servers. The total worm length is only 376 bytes and it does not contain any destructive payload. 

                     The worm sends packets to randomly generated IP addresses to infect other unpatched SQL servers. This increases the network traffic and causing denial of service attack in the network. This vulnerability can be fixed by installing service pack 3 from the link

                     SQLSlammer worm uses a buffer overflow hole in the unpatched SQL servers running on Microsoft NT, 2000 and XP. It will not affect Windows 9x and ME systems. The worm will reside in memory only. SQLSlammer worm will not write anything in the compromised system. 

Removal instructions:

Download and install the service pack 3 from the Microsoft site Then restart the system to remove the worm from memory.

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