CoinEx

Private Key Leakage

Estimated loss

$70.00M

VERDICT —OUT OF SCOPE

Root cause is private-key / signer compromise — the on-chain contract behaved exactly as written. No pre-deployment source audit or bytecode review reaches the key-custody perimeter; this is operational-security territory (HSM/MPC hygiene, key rotation, hot-wallet isolation). Bytecode would show nothing wrong.

▰ METHOD

PRIVATE KEY

PRIVATE-KEY

Root cause

Root-cause analysis not yet published. The incident description below contains all currently available signal — review the attack transaction directly for definitive forensics.

Forensic narrative

The cryptocurrency exchange CoinEx suffered a hacker attack. The cause of the incident was initially determined to be the leakage of hot wallet private keys. The damage caused is estimated to have reached US$70 million, and the impact has affected multiple blockchains. CoinEx tweeted that it had identified and quarantined suspicious wallet addresses related to the hack and that deposit and withdrawal services had been suspended. On September 13, SlowMist found during the analysis process that CoinEx hackers were related to Stake.com hackers and Alphapo hackers. CoinEx hackers may be the North Korean hacker group Lazarus Group. Attack method (per SlowMist): Private Key Leakage. Reported loss: $ 70,000,000.

Primary source

https://twitter.com/coinexcom/status/1701662057496731975 ↗

Sourced from

slowmist

Technical record