Slides from my Virus Bulletin 2009 presentation (together with Morton Swimmer) in Geneva:
Twarfing: Malicious Tweets
View more presentations from Costin Raiu.
Additionally, if you can read Romanian, I've written a short story about the project for my friend Radu Georgescu's blog here (thanks for the invitation, Radu!):
http://www.radugeorgescu.ro/2009/10/15/malware-de-pe-twitter/
Enjoy,
Costin
