A Russia-linked hacking group e-mailed multiple executives of Japanese publisher Kadokawa Corp. that it had received $2.98 million in cryptocurrency from the firm after it was hit by a massive cyberattack in June, a company source said Thursday.An investigation by security firm Unknown Technologies Inc. commissioned by Kyodo News found online records of a transaction worth $2.98 million made the same month. The hacking group, purporting to be the Russia-linked BlackSuit ransomware gang, ultimately leaked the stolen information.The hackers had claimed the gang had stolen and encoded data inc…READ FULL ARTICLE