Chatting with a hacker about cybercrime gangs, Medibank and supporting Russia's attacks on Ukraine

The hacker said he "could not care less" about Australians affected by the Medibank data breach. (Four Corners: Nick Wiggins)

What would you say to the person who stole your personal data, held it ransom and posted it on the dark web?

The people behind the cyber attacks on Australia are highly organised criminal gangs, often based in Russia, with dozens of employees and even HR departments.