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Re: Tracing where it started

  • From: Travis Pugh
  • Date: Sat Jan 25 18:49:04 2003 
According to Clayton Fiske:

> Interestingly, looking through my logs for UDP 1434, I saw a
sequential
> scan of my subnet like so:
>
> Jan 16 08:15:51 206.176.210.74,53 -> x.x.x.1,1434 PR udp len 20 33
IN
> Jan 16 08:15:51 206.176.210.74,53 -> x.x.x.2,1434 PR udp len 20 33
IN
> Jan 16 08:15:51 206.176.210.74,53 -> x.x.x.3,1434 PR udp len 20 33
IN
>
> All from 206.176.210.74, all source port 53 (probably trying to
> use people's DNS firewall rules to get around being filtered).
>
> After that, I saw nothing until the storm started last night from
many
> different source IPs, which was at Jan 24 21:31:53 PST for me.

Ditto on the sequential scan well before the actual action, except
that mine came on Jan. 19th:

Jan 19 10:59:11 Deny inbound UDP from 67.8.33.179/1 to xxx.xxx.xxx.xxx
...
...

The scan went across several subnets I manage inside 209.67.0.0
serially.  My sources were all from 67.8.33.179, all source port 1.
The actual worm propagation began to hit my logs at 00:28:16 EST Jan
25.

Cheers.

-travis