they obviously didn't want you to know that you where hacked. Try find the
way they got in, look at the logs line by line... and shutdown all unneeded
services. Try firewall services only need on your internal network to your
internal network. They will be back, I have seen that index. file before.
regards
shun7
----- Original Message -----
From: "Matthew J. Sahagian" <gent@dotink.org>
To: <focus-linux@securityfocus.com>
Sent: Wednesday, October 27, 2004 2:30 AM
Subject: Strange Attack On A Webserver I Work On
Hello, I'm a long time reader of this list and have never really had the
need to post here. However, recently a webserver that I do minimal
administrative work for was attacked. We're still unsure exactly what had
been done. Most of the logs have been either cleaned or wiped completely
(either by log rotate or by the attacker). I was gone for the weekend so I
sorta came back to this. I don't really have questions about the attack per
se, we're doing pretty well at the recovery process.... one question I do
have however is this.
The attacker (either manually or using a program) replaced all
index.html/htm and index.php files they had permission to replace with a UDP
flooder. I extracted some of the information from the flooder using the
strings program and heres what I get:
!HELP! beta version.
!HELP!
!HELP! #brazil@efnet - eleet team
!HELP! + code by bonny ::: bonny@hacker.com.br
!CREDITS! * creditos aos amigos e a quem me ajudou.
!CREDITS!
!CREDITS! * none (root@suid.net) ::: Brazil
!CREDITS! packet spoof
!CREDITS! * cyclone (cyc@pop.com.br) ::: Brazil
!CREDITS! parceiro das hackadas, aprende rapido
!CREDITS! * mariana (mazinha@brasnet.org) ::: Brazil
!CREDITS! minha leet girl, exclusiva :)
!CREDITS! * alcaloide (root@faggot.net) ::: Brazil
!CREDITS! super lamer, versao 3 pra pacotar ele
* Opcao invalida! * %s para maiores informacoes.
!AJUDA!: %s -help
CREDITS: %s -credits
!USAGE!: %s (host/ip) (size) (loops)
(host/ip) == host do babaca a ser fudido.
(size) == bytes a serem enviados.
(loops) == tempo da fudecao/s.
CTRL-C - ACAO CANCELADA!
FUDEDOR (v3.0) by bonny - PRIVATE!@#!
host desconhecido: %s
Maximo de bytes permitodos: 65535.
A maquina nao tem memoria suficiente.
FUDENDO A VERA %s COM %s bytes...
pronto maneh, o babaca foi fudido! :)
My question to anyone out there who can answer it is this, do you know of
any kind of automated attack that replaces index files for websites with
such a flooder? It doesn't seem like this hack was extremely well thought
out, or done by anything more than a script kiddy... if it was, why would
they replace these files with this binary program? Why not replace it with
a new index.html file saying we got hacked?
