NTLM Challenge Response is 100% Broken (Yes, this is still relevant)

http://markgamache.blogspot.com/2013/01/ntlm-challenge-response-is-100-broken.html
http://markgamache.blogspot.com/2013/01/ntlm-hasnt-been-relevant-for-like-12.html

Rehashing Pass the Hash 

http://markgamache.blogspot.com/2013/01/rehashing-pass-hash.html

https://github.com/SpiderLabs/Responder

Introducing Responder-1.0

http://blog.spiderlabs.com/2012/10/introducing-responder-10.html

http://blog.spiderlabs.com/2013/01/owning-windows-networks-with-responder-17.html

http://blog.spiderlabs.com/2013/02/owning-windows-network-with-responder-part-2.html