mailing list archives
Re: xpire.info & splitinfinity.info - exploits in the wild
From: Kevin <KKadow () gmail com>
Date: Sun, 24 Oct 2004 13:01:08 -0500
On Sun, 24 Oct 2004 13:47:04 +0200, Elia Florio <eflorio () edmaster it> wrote:
i'm doing some analysis on a Linux-Mandrake 9.0 web server
of a person that was compromised in October.
In this host now it's installed a special trojan that insert a
malicious <IFRAME> tag into every served .PHP page.
. . .
I've found inside Apache log that the hacker break-in inside the machine
using an overflow and injecting an executable /tmp/a.out via "qmail-inject".
I'm not sure that qmail-inject isn't a red herring? The actual
download looks like 'wget' was used.
These are the suspicious log lines :
[Sun Oct 3 03:35:10 2004] [notice] child pid 16012 exit signal Segmentation
[Sun Oct 3 04:08:34 2004] [notice] child pid 1272 exit signal Segmentation
[Sun Oct 3 07:18:27 2004] [notice] child pid 4397 exit signal Segmentation
[Mon Oct 4 02:27:55 2004] [notice] child pid 1203 exit signal Segmentation
qmail-inject: fatal: unable to parse this line:From: I.T.I.S. S. CANNIZZARO"
<angdimar () yahoo it>
[Mon Oct 4 18:43:02 2004] [notice] child pid 4248 exit signal Segmentation
[Mon Oct 4 22:58:50 2004] [notice] child pid 1190 exit signal Segmentation
[Tue Oct 5 11:58:13 2004] [notice] child pid 15689 exit signal Segmentation
qmail-inject: fatal: unable to parse this line:
To: Drugo:Lebowski () libero it
sh: -c: option requires an argument
Resolving xpire.info... fatto.
Connecting to xpire.info[18.104.22.168]:80... connected.HTTP richiesta
inviata, aspetto la risposta... 200 OK
Lunghezza: 19,147 [text/plain]
0K .......... ........ 100% 9.97K
15:50:13 (9.97 KB/s) - `/tmp/a.out' salvato [19147/19147]
[Fri Oct 8 20:26:52 2004] [notice] child pid 9647 exit signal Segmentation
[Sat Oct 9 01:09:51 2004] [notice] child pid 3840 exit signal Segmentation
Tryin a WGET of http://xpire.info/cli.gz , I get an ELF executable for
possible containing a ConnectBack shell. Inside this ELF file you can grep
Usage: %s host port
pqrstuvwxyzabcde 0123456789abcdef /dev/ptmx /dev/pty /dev/tty sh -i Can't
fork pty, bye!
Fuck you so
/bin/sh No connect
Looking up %s... Failed!
%u Connect Back
I don't know if the hacker installs in this machine a rootkit, but the check
of md5sum of
ls, lsof, ps, netstat binaries with other ones from a clean Mandrake distr.
I assume you used a bootable CD on the infected machine to do the checksums?
The main problem is finding how the Apache Server (or PHP) was altered by
because every user that connects to this host now, could be infected by
several HTML/IE recent exploits.
Check the httpd.conf (and other apache configuration files) for any
changes, and also the contents of each module loaded. It's also
possilble, but less likely, that the injection is done in a kernel
Sniffing an HTTP packet from this host, I've found that *SOMETIMES* (in a
Sounds like a good time to replace the entire server with a fresh build.
Full-Disclosure - We believe in it.