Full Disclosure mailing list archives
Re: [SPAM] Spam sent via spambots?
From: James Riden <j.riden () massey ac nz>
Date: Tue, 02 Nov 2004 08:33:21 +1300
Hugo van der Kooij <hvdkooij () vanderkooij org> writes:
Sendmail logs also show a significant number of false recipients which are known to be part of worms that are by now over 6 months old. Like: Nov 1 07:16:06 gandalf sendmail[17575]: iA16G3QU017575: ruleset=check_rcpt, arg1=<mary () vanderkooij org>, relay=[221.232.95.12], reject=550 5.7.0 <mary () vanderkooij org>... - REJECTED: KEEP YOUR VIRUS JUNK!; SEE ALSO: http://hvdkooij.xs4all.nl/email.cms Nov 1 07:16:07 gandalf sendmail[17575]: iA16G3QU017575: lost input channel from [221.232.95.12] to MTA after rcpt Nov 1 07:16:07 gandalf sendmail[17575]: iA16G3QU017575: from=<maria () tencent com>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=[221.232.95.12] If there are that many worms going around it only shows how easy it is to write your own little SMTP engine. Spammers may have deployed similar backdoors/trojans/bots/...
A lot of stuff out there will also HELO as <yourdomain>, or the IP address of your MX. I'm pretty sure it's a worm, because I can't think how any MTA/MUA could be that broken. -- James Riden / j.riden () massey ac nz / Systems Security Engineer Information Technology Services, Massey University, NZ. GPG public key available at: http://www.massey.ac.nz/~jriden/ _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
Current thread:
- Re: [SPAM] Spam sent via spambots? Hugo van der Kooij (Oct 31)
- Re: [SPAM] Spam sent via spambots? James Riden (Nov 01)