Latest cybersecurity reporting from selected sources.

US Treasury Says Crypto Exchange Helped Launder $100 Million for Ransomware GangsThe U.S. Department of Treasury sanctioned Thursday a Russian founder and co-owners of the Garantex cryptocurrency exchange in a bid to tighten methods criminal hackers use to launder extortion money and Kremlin sanctions busting. Regulators also sanctioned Garantex successor Grinex.

French Police Reportedly Detain Accused Ryuk Money Launder Ekaterina ZhdanovaAn international investigation led by the United Kingdom busted Russian money cash-for-crypto laundering networks in an operation that's led to the arrest of 84 individuals and U.S. sanctions against others. One of the network allegedly laundered extortion money paid to the Ryuk ransomware group.

Costa Rica’s national health service was hacked sometime earlier this morning by a Russian ransomware group known as Hive. The intrusion comes just weeks after Costa Rican President Rodrigo Chaves declared a state of emergency in response to a data ransom attack from a different Russian ransomware gang — Conti. Ransomware experts say there is good reason to believe the same cybercriminals are behind both attacks, and that Hive has been helping Conti rebrand and evade international sanctions targeting extortion payouts to cybercriminals operating in Russia.