Re: Strange Attack On A Webserver I Work On

From: Michael da Silva Pereira (michael_at_tradepage.co.za)
Date: 10/27/04

  • Next message: TJ Easter: "Re: Strange Attack On A Webserver I Work On" 
    To: <focus-linux@securityfocus.com>
Date: Wed, 27 Oct 2004 07:18:11 +0200

    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@***.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?

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