> 
> Computers infected with the Sobig.F worm are programmed
> to automatically download an executable of unknown function
> from a hard-coded list of servers at 19:00 UTC (3:00pm EDT)
> X-Force is recommending wholesale outbound filtering of 
> the following IP addresses:
> 
> 67.73.21.6
> 68.38.159.161
> 67.9.241.67
> 66.131.207.81
> 65.177.240.194
> 65.93.81.59
> 65.95.193.138
> 65.92.186.145
> 63.250.82.87
> 65.92.80.218
> 61.38.187.59
> 24.210.182.156
> 24.202.91.43
> 24.206.75.137
> 24.197.143.132
> 12.158.102.205
> 24.33.66.38
> 218.147.164.29
> 12.232.104.221
> 68.50.208.96
> 
> The request method uses UDP port 8998. X-Force also 
> recommends that this port be filtered outbound.
> 


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