The hacker, whose true name is unknown, released a message on Pastebin that contained an encrypted file with instruction for swapping the stolen tokens. He also claimed he will share additional specifics regarding how to access them in a subsequent article.
Kyber, which was created by Loi Luu and Oliver Vadim, revealed the theft on Feb. 20, and said it was cooperating with law enforcement authorities to investigate the crime.
The hacker's letter also featured multiple links to what looked to be real records of monies paid to exchanges or wallets connected to him. The addresses on those documents were not related with stolen cash, according to Loi Luu and Oliver Vadim.
The pair said they couldn't be able to verify if all of those addresses were linked to a specific hacker or simply fell to those who had received their tokens as part of airdrops or giveaways by exchanges or other organisations - such as Ethereum-based Wagerr (WGR) - that enable users to receive tokens for free or at a reduced cost in exchange for providing feedback about their experience employing the platform.
The hacker, who goes by the moniker return the stolen assets to the victims if he gets 2,000 ETH ($1.4 million) in 30 days.
If Phear does not get that amount of money, he will be imprisoned for up to 10 years.
In a blog post written on Medium in size on Wednesday, Phear revealed that he has been in touch with attorneys and is now working on a means to repay the stolen monies. The hacker also said he would have paid all of his cash back to Kyber Network if they had given him a further opportunity to set up an account with them before conducting an attack on their systems last February.