Solntsevskaya.

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The Solntsevskaya Bratva, or Solntsevskaya Brotherhood is a powerful organized crime organization from Moscow, Russia; it is notably ranked as the most dangerous criminal organization in the world. It is named after the Solntsevo neighborhood in the city.

The Solntsevskaya bratva have many business interests with legitimate business groups. Law enforcement believe in addition to offering these groups 'protection' the gang also assist the businesses when it comes to not-so-legal matters.
Though it is considered one of the most powerful Russian organized crime groups, it is difficult for law enforcement to accurately measure the strength and influence of the family, since many racketeers declaring themselves 'solntsevskaya' only do so to be feared and respected, and are not actually affiliated with the organization, and there is also frequent internal fighting within the group.
A 2008 report for the U.S.A, revealed the organization had a presence in San Francisco and was working with local drug cartels as well as being involved in money laundering, prostitution, credit card fraud, human trafficking, arms deals and other illegal activity.