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 Compromised (Unknown Method)
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
Classification: Infrastructure. Technique: Private Key Compromised (Unknown Method). Target type: CEX. Affected chains: Ethereum, Solana, XRP, Bitcoin, BSC, Sui, Base, Tron, Arbitrum, Avalanche, Polygon, Optimism, zkSync Era.
Sourced from
DefiLlama Hacks dataset · api.llama.fi/hacks
Technical record
- chain
- multichain
- protocol
- Phemex
- bug_class
- private-key
- date_occurred
- 2025-01-23
- loss_usd
- $85,000,000
- classification
- Infrastructure
- technique
- Private Key Compromised (Unknown Method)
- target_type
- CEX
- source_id
- dl:2369
Related — same bug class· private-key