RPC errors

Mon Aug 11 20:51:57 UTC 2003

Sean Donelan wrote:

> http://isc.sans.org/diary.html?date=2003-08-11
> The worm uses the RPC DCOM vulnerability to propagate. One it finds a
> vulnerable system, it will spawn a shell and use it to download the actual
> worm via tftp.
> 
> The name of the binary is msblast.exe. It is packed with UPX and will self
> extract. The size of the binary is about 11kByte unpacked, and 6kBytes
> packed:
> 

That shows what I'm seeing. 10% of all outbound packets are tcp/135. 
Currently blocked both directions at edges in my network until further 
notice. Keeping an eye on other ports, but this is the only one causing 
any amount of load to draw concern.

-Jack