Decentalized finance (defi) protocol Bzx has recovered the $8.1 million it lost to a hacker a few days ago. The company claims it was able to track down the cyber thief, whom it refused to name for legal reasons, through their on-chain activity. Cornered, the attacker returned the loot.
“All funds have been recovered from the attacker. We are restoring the system,” said Kyle Kistner, co-founder of Bzx, in a statement released on September 15. “The funds are now in the team wallet and being used to restore the lending pools.”
On September 13, a faulty code in Bzx smart contracts allowed the hacker to mint 219,200 LINK tokens (valued at $2.6 million); 4,503 ETH ($1.65 million); 1,756,351 USDT ($1.76 million); 1,412,048 USDC ($1.4 million) and 667,989 DAI (worth $681,000) – all totaling $8.1 million.
Marc Thalen, the Bitcoin.com lead engineer who discovered the bug, has finally been paid a bounty of $45,000. Initially, Bzx did not want to pay out that much amount of money to Thalen, offering him just $12,500 as bounty because “Marc had only reported the issue when the attack had mostly concluded.”
In a thread on Twitter, Thalen complained: “Bzx just mentioned on a call it doesn’t feel like it’s worth more than 12.5k as their ‘independent’ panel decided to and they feel like sticking to it. They are not willing to disclose [the] identities of the panel. [I’m] really disappointed in Bzx.”
However, that figure severely undermined the protocol’s own bug bounty policy for high-level discoveries, which can be paid up to $350,000. Bzx later reconsidered its position following a massive social media backlash and paid Thalen a “reasonable” $45,000.
Peckshield, one of the two audit firms that failed to identify the defective code that led to the theft of the $8.1 million crypto, said in a letter to the Bzx community that its initial audit identified 16 security issues that were fixed – but that is never enough.
“Bzx and Peckshield are developing a plan to re-examine the protocol and set up real-time monitoring on key blockchain data indicators,” it wrote. The measure is expected to enhance security on the platform.
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