From: rottz at securityflaw.com (Peter E. Johnson)
Subject: ISS Security Brief: "Stumbler" Distributed Stealth Scanning Network
 (fwd)

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This advisory isn't as good as intrusec's but the snort rule for 'Tron' is 
helpful to detect infected hosts.

alert tcp any any -> 12.108.65.76/32 22 (msg:"Stumbler Trojan";)

Intrusec's Advisory:
http://www.intrusec.com/55808.html

- ---------- Forwarded message ----------
Date: Thu, 19 Jun 2003 23:52:16 -0400 (EDT)
From: X-Force <xforce@....net>
To: alert@....net
Subject: ISS Security Brief: "Stumbler" Distributed Stealth Scanning Network

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Internet Security Systems Security Alert
June 19, 2003

"Stumbler" Distributed Stealth Scanning Network

Synopsis:

X-Force has been tracking reports of suspicious and widespread Internet
traffic with a TCP Window size of 55808. A substantial amount of traffic
captured from sites around the world point to a new distributed port
scanning system. X-Force has analyzed malware that appears to be a client
capable of scanning and receiving network mapping data from other similar
clients distributed across the Internet. X-Force has named this malware,
"Stumbler".

For the complete ISS X-Force Security Alert, please visit:
http://www.iss.net/issEn/delivery/xforce/alertdetail.jsp?oid=22441

______


About Internet Security Systems (ISS)
Founded in 1994, Internet Security Systems (ISS) (Nasdaq: ISSX) is a
pioneer and world leader in software and services that protect critical
online resources from an ever-changing spectrum of threats and misuse.
Internet Security Systems is headquartered in Atlanta, GA, with
additional operations throughout the Americas, Asia, Australia, Europe
and the Middle East.


Copyright (c) 2003 Internet Security Systems, Inc. All rights reserved
worldwide.


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Disclaimer: The information within this paper may change without notice.
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- --[PinePGP]-----------------------------------------------------------
gpg: Signature made Thu 19 Jun 2003 11:50:27 PM EDT using RSA key ID 7DF5E1BD
gpg: Good signature from "X-Force <xforce@....net>"
gpg: Fingerprint: AB 47 94 77 68 8F 75 94  73 28 87 51 39 97 FB F8
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