Hackers who compromised the Ronin blockchain bridge used sanctioned cryptocurrency mixers to launder funds

Even now, hackers continue to use ETH and BTC privacy, as well as Tornado Cash-type mixers to hide the origin of funds.

The hackers behind the hack of Sky Mavis' Ronin Bridge in March this year took out all funds in ETH and BTC using renBTC mixed with privacy tools, namely ChipMixer and Bitcoin Blender.

The hackers' actions were tracked with BliteZero, a service you can use to track transactions online. They contributed a lot to the tracking of the stolen $600 million transactions, providing information as far back as March 23rd. 

First of all, they decided to convert stolen tokens into ETH, then they loaded them into well-known Tornado Cash, which by the way is now under sanctions. After that, they obtained BTC using the Ren protocol.

After that about 6,631 BTC were distributed to various centralized exchanges and decentralized protocols

The report also states that Ronin hackers withdrew 2,871 BTC out of 3,460 BTC, or $61.6 million as of August 22, via Bitcoin privacy tool ChipMixer.