The bitcoin mixers — ChipMixer and Wasabi Wallet — have received 56.5% of the 30.4 stolen bitcoins, i.e. 17.18 bitcoins (currently worth about $192,000), according to Elliptic.
The Twitter hack took place on July 15, and at the time, the bitcoins were worth about $121,000. The price of bitcoin has risen in recent days.
Elliptic said it tracked the bitcoin through its transaction screening tool and found that the hackers have sought to launder the funds gradually.
Bitcoin mixers mask the blockchain transaction trail, making it challenging to follow funds and to know where the funds are spent or cashed out.