BlackSheep – Detect Users Of FireSheep On The Network

The New Acunetix V12 Engine


As you surely know, things blew up recently at Toorcon 12 with the release of the much talked about Firefox plugin called Firesheep.

There were various discussions about how to mitigate against it like using Firefox plug-ins to force SSL connections (where available). Microsoft also tried to secure Hotmail with SSL but kinda b0rked that too.

For the 1 person in the World left that doesn’t know, Firesheep allowed any user to seamlessly hijack the web session of another user on the same local network. Although such attacks are not new, the ease of use presented by Firesheep brought session hijacking to the masses.

BlackSheep, also a Firefox plugin is designed to combat Firesheep. BlackSheep does this by dropping ‘fake’ session ID information on the wire and then monitors traffic to see if it has been hijacked. While Firesheep is largely passive, once it identifies session information for a targeted domain, it then makes a subsequent request to that same domain, using the hijacked session information in order to obtain the name of the hijacked user along with an image of the person, if available. It is this request that BlackSheep identifies in order to detect the presence of Firesheep on the network. When identified, the user will be receive the following warning message:


BlackSheep - Detect FireSheep

It should be noted that Firesheep and BlackSheep cannot be installed on the same Firefox instance as they share much of the same code base. If you want to run both Firesheep and BlackSheep on the same machine, they should be installed in separate Firefox profiles.

Requirements

In order to install BlackSheep, you need:

  • Mac OS X: 10.5 or newer on an Intel processor.
  • Windows: XP or newer. Install Winpcap first!
  • Firefox: 3.5 or newer. 32-bit only.
  • Linux : details here

You can download BlackSheep here:

blacksheep-latest.xpi

Or read more here.

Posted in: Countermeasures, Forensics, Networking Hacking, Security Software

, , , ,


Latest Posts:


testssl.sh - Test SSL Security Including Ciphers, Protocols & Detect Flaws testssl.sh – Test SSL Security Including Ciphers, Protocols & Detect Flaws
testssl.sh is a free command line tool to test SSL security, it checks a server's service on any port for the support of TLS/SSL ciphers, protocols as well as recent cryptographic flaws and more.
Four Year Old libSSH Bug Leaves Servers Wide Open Four Year Old libssh Bug Leaves Servers Wide Open
A fairly serious 4-year old libssh bug has left servers vulnerable to remote compromise, fortunately, the attack surface isn't that big as neither OpenSSH or the GitHub implementation are affected.
CHIPSEC - Platform Security Assessment Framework CHIPSEC – Platform Security Assessment Framework For Firmware Hacking
CHIPSEC is a platform security assessment framework for PCs including hardware, system firmware (BIOS/UEFI), and platform components for firmware hacking.
How To Recover When Your Website Got Hacked How To Recover When Your Website Got Hacked
The array of easily available Hacking Tools out there now is astounding, combined with self-propagating malware, people often come to me when their website got hacked and they don't know what to do, or even where to start.
HTTrack - Website Downloader Copier & Site Ripper Download HTTrack – Website Downloader Copier & Site Ripper Download
HTTrack is a free and easy-to-use offline browser utility which acts as a website downloader and a site ripper for copying websites and downloading them for offline viewing.
sshLooter - Script To Steal SSH Passwords sshLooter – Script To Steal SSH Passwords
sshLooter is a Python script using a PAM module to steal SSH passwords by logging the password and notifying the admin of the script via Telegram when a user logs in.


5 Responses to BlackSheep – Detect Users Of FireSheep On The Network

  1. mpg November 25, 2010 at 12:34 pm #

    Sadly, the same protection against Firesheep can also be used to defeat Blacksheep. Set Firesheep to sniff on your wireless interface, but set all of your traffic to use an encrypted tunnel.

  2. Fred November 26, 2010 at 7:10 am #

    If i understand :

    To use BlackSheep, the client’s networkcard must accept promiscuous mode and the reply of the hijack must be on the same network access ?

    If it doesn’t accept promiscuous mode and you use TOR to replay, i think blacksheep can’t see anything…

    • Darknet November 27, 2010 at 9:30 am #

      Yes to both, you gotta be on same LAN (connected via same AP) and your card must be able to enter promiscuous mode to pull the traffic off the wire.

      • Bogwitch November 30, 2010 at 9:39 am #

        Fred,

        If you’re using TOR to log in to sites, the exit node operator can view all your traffic (and there’s a history of them doing so)

  3. Gorindor December 1, 2010 at 8:56 pm #

    If you are running Windows 7 and have User Access Control (UAC) enable one must go to “Start > All Programs > Mozilla” and then right-click on “Firefox” and select “Run as administrator…” in order for the BlackSheep plugin to see your network adapter.