Tank interview: A hacking kingpin reveals all to the BBC

One of the world's most prominent cyber-criminals speaks to the BBC in an exclusive interview.

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I stand up ready to give this former cyber-crime kingpin a professional hello. But, like a cheeky cartoon character, he pokes his head around a pillar with a giant grin on his face and winks.

Tank, whose real name is Vyacheslav Penchukov, climbed to the top of the cyber-underworld not so much with technical wizardry, but with criminal charm.

"I am a friendly guy, I make friends easily," the 39-year-old Ukrainian says, with a broad smile.

Having friends in high places is said to be one of the reasons Penchukov managed to evade police for so long. He spent nearly 10 years on the FBI's Most Wanted list and was a leader of two separate gangs in two distinct periods of cyber-crime history.