October 31, 2018


Anatomy of a sextortion scam

1 min read

By examining sextortion spam campaigns in detail, our researchers were able to understand how criminals operate, and to see why users were tricked into sending them bitcoin despite empty threats.

May 30, 2014


Walking in a Winter Wonderland

3 min read

It is not uncommon to see an anti-spam system catch >99% of the spam passing through it. Most of the best anti-spam systems catch >99.9% of spam. In this environment, spammers try just about anything to evade spam filters. Some spammers believe that blasting at high volume is the key to success. Others believe complete […]