I recall seeing on HN lots of descriptions of just how hard it is to maintain strict opsec, or anonymity. Obscurity sometimes is the best security, but these clowns made themselves a big a$$ target for the FBI. Its one thing to be one among hundreds of small-time ransomware attacks, and another to be the one behind shifting the price of oil of the entire southeast US, and to be the subject of thousands of memes about Americans stockpiling gasoline in the backs of their SUVs.