Russian Business Network
The Washington Post recently ran an article profiling the Russian Business Network, an Internet business based in St. Petersburg said to be responsible for hosting websites that carry out a major part of the worlds cyber-crime.
Reports say that the company sells website hosting to groups propagating online crime, with links to child pornography, piracy, spamming, and cyber scams. Groups operating through the companys computers are believed to be behind around half of last years phishing incidents, according to the article.
Take a look at Brian Krebs' "Shadowy Russian Firm Seen as Conduit for Cybercrime" for more information.