At least four such forums have been breached to date, namely Verified in January, Crdclub in February, and Exploit and Maza in March. All are predominantly Russian-language forums and saw their breaches publicly disclosed elsewhere.
Intelligence firm Intel 471, which has been closely following the hacks, says that, while the identity of the actor behind the attacks is unknown, the public nature of the attacks eliminates the possibility of a law enforcement operation.
In January, a threat actor announced on underground forum Raid Forums that they breached Verified, an established Russian-language cybercrime forum. The adversary said they had Verified’s entire database, containing details on all registered users, including private messages, posts, threads, and hashed passwords.