Re: Suspicious joe.exe

["Felix Huber" <huberfelix () webtopia de>]

Hi Reb,

i am pretty sure that this is a IRC Backdoor / Zombie. Could be used for
DDoS Attacks and other bad things.

You should delete the registry entry - but don't forget to look for other
entries (Autostart, *.ini,...etc).

And what is also very important: find the security hole the Intruder used
(Unicode, IDA,...etc).

Regards,
Felix Huber

-------------------------------------------------------
Felix Huber, Security Consultant, Webtopia
Guendlinger Str.2, 79241 Ihringen - Germany
huberfelix () webtopia de     (07668)  951 156 (phone)
http://www.webtopia.de     (07668)  951 157 (fax)
                                         (01792)  205 724 (mobile)
-------------------------------------------------------

> Greetings all,
>
> While troubleshooting a problem with Win2k server doing a hard lock ( no
> response to keyboard/mouse) I happened upon the Run key
> (SOFTWARE\Microsoft\Windows\CurrentVersion\Run\) and noticed that joe.exe
> was being started.  Being that this box was no more than 2 weeks old I
found
> this highly odd since it wasn't being loaded as a service and whatnot.  So
> I'm done dealing with the 2k server hang for a bit and I start looking at
> this file. After I've googled and bugtraq'd my way around I can't find
> anything that mentions such a Trojan/virus. It seems to be some type of
irc
> client that connects to 205.188.253.230 and joins #penr0x, which is +I.
If
> asked I can gzip/zip up the file and send it to someone.  If anyone has
any
> insight to this I'd love to hear from you. Here's a bit of information on
> the exe.
>
> [reb@ reb]$ ls -al joe.exe
> -rw-r--r--   1 reb      reb         53248 Aug  1 17:58 joe.exe
> [reb@ reb]$ md5sum joe.exe
> 488c80ba0b2186a1ba52c4e69c590bc6  joe.exe
>
> Some of the more useful strings from `strings joe.exe` are:
>
> Microsoft Visual C++ Runtime Library
> Runtime Error!
> Program:
> <program name unknown>
> SunMonTueWedThuFriSat
> JanFebMarAprMayJunJulAugSepOctNovDec
> GetLastActivePopup
> GetActiveWindow
> MessageBoxA
> NICK
> VERSION
> KILL
> HELP
> PRIVMSG
> PING
> NOTICE %s :DNS <host>
> NOTICE %s :Resolving %s...
> NOTICE %s :Unable to resolve.
> NOTICE %s :Resolved to %s.
> NOTICE %s :GET <host> <save as>
> NOTICE %s :Unable to create socket.
> http://
> NOTICE %s :Unable to resolve address.
> NOTICE %s :Unable to connect to http.
> GET /%s HTTP/1.0
> Connection: Keep-Alive
> User-Agent: Mozilla/4.75 [en] (X11; U; Linux 2.2.16-3 i686)
> Host: %s:80
> Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png,
*/*
> Accept-Encoding: gzip
> Accept-Language: en
> Accept-Charset: iso-8859-1,*,utf-8
> NOTICE %s :Receiving file.
> NOTICE %s :Saved as %s
> NOTICE %s :Voyager Alpha Force: Age of Kaiten
> NOTICE %s :NICK <nick>
> NOTICE %s :Nick cannot be larger than 9 characters.
> NICK %s
> NOTICE %s :UDP <target> <secs>
> NOTICE %s :GET <http address> <save as> = Downloads a file off the
> web and saves it onto the hd
> NOTICE %s :NICK <nick> = Changes the nick of the knight
> NOTICE %s :DNS <host> = DNSs a host
> NOTICE %s :IRC <command> = Sends this command to the server
> NOTICE %s :KILL = Kills the knight
> NOTICE %s :VERSION = Requests version of knight
> NOTICE %s :HELP = Displays this
> IRC
> SYSTEM
> HIDE
> SHOW
> MODE %s -xi
> JOIN %s :
> WHO %s
> PONG %s
> SOFTWARE\Microsoft\Windows\CurrentVersion\Run\
> TaskReg
> #penr0x
> 205.188.253.230
> NICK %s
> USER %s localhost localhost :%s
> ERROR
>
>
> Reb