RE: DoS worm
From: Thor Larholm (thor_at_pivx.com)
Date: 10/21/04
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Date: Thu, 21 Oct 2004 02:05:36 -0700 To: <gillettdavid@fhda.edu>, <incidents@securityfocus.com>
From your description your six machines are now compromised by a random
Trojan being controlled by shaman.exodus.ro - I take it you perhaps took
some capture logs of the SSH connections, the SYN flooding and the SMB
probing? That would be invaluable to knowing whether this is a new SMB
vulnerability or whether the worm simply connects using insecure
administrator passwords.
Thor
-----Original Message-----
From: David Gillett [mailto:gillettdavid@fhda.edu]
Sent: Wednesday, October 20, 2004 10:48 PM
To: incidents@securityfocus.com
Subject: DoS worm
Yesterday, someone (we believe it was one of our students)
unplugged a lab Mac from the campus network and plugged in a
PC (laptop, we assume). Besides whatever the user wanted, it
apparently did three things:
1. Attempt to open a lot of connections (port 22, SSH) to
shaman.exodus.ro (62.80.109.128), then
2. Send a SYN flood, spoofing the source address as 0.0.0.0,
to ports 22 and 80 of weed.powered.at (195.149.115.18), and
3. Probe random addresses in our Class B space (port 445, CIFS);
if it got a connection, it tried various SMB-type things amongst
which I was able to pick out the string "IPC". Five other machines
in our space eventually demonstrated similar symptoms.
I don't know what this beast is. I infer that #2 is a DoS attack
which is perhaps the purpose of the worm, and that #3 is its spread
vector via the IPC$ share.
Anybody recognize this?
Dave Gillett
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