Scammers Who Scam Scammers, Hackers Who Hack Hackers: Exploring a Sub-economy on Cybercrime Forums

It's no secret that criminal forums and marketplaces are crammed with nefarious activity. But behind all the initial access brokers, stolen data, and malware, there's a hidden, thriving subcategory of crime going unnoticed: threat actors targeting other threat actors. These cannibalistic criminals (we call them 'metaparasites': a parasite whose host is also a parasite) are such a persistent and expensive problem that there are specific forum rooms - containing thousands of posts and going back years - dedicated to blacklisting …

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