To compile just run make from command line.

WARNING I AM NOT RESPONSIBLE FOR THE STUPID SHIT YOU DO WITH THIS.

This is meant for DC801 CTF, not for anything else !!!!

Leaving this code running is dangerous.

To compile this code you will need gcc and make.

debian: apt-get install build-essential centos: yum install make && yum install gcc

you@server:/folder/path/# make

To use run you@server:/folder/path/# ./simple_backdoor portnumber &

use jobs to see what servers you are running

to test the server use telnet to the port number

telnet 127.0.0.1 portnumber

example:

you@server:/file/path/simple_backdoor# ./simple_backdoor 21

you@server:/file/path/simple_backdoor# telnet 127.0.0.1 21 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. who nemus pts/3 2012-12-10 19:18 (10.x.x.x) nemus pts/4 2012-12-10 21:59 (10.x.x.x) Connection closed by foreign host.

you@server:/file/path/simple_backdoor# telnet 127.0.0.1 21 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/server-root 24G 6.2G 16G 28% / udev 236M 8.0K 236M 1% /dev tmpfs 99M 776K 98M 1% /run none 5.0M 0 5.0M 0% /run/lock none 246M 0 246M 0% /run/shm /dev/sda1 228M 78M 139M 36% /boot Connection closed by foreign host.

you@server:/folder/path# make clean