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
Hackers with unauthorized access to the exchange’s hot wallets had stolen roughly $60 million in bitcoin, bitcoin cash, and MonaCoin. That being said, the exact amount of bitcoin cash stolen remains unknown. Attack method (per SlowMist): Wallet Stolen. Reported loss: $ 59,000,000.
Sourced from
slowmist
Technical record
- chain
- bitcoin
- protocol
- ZAIF
- bug_class
- private-key
- date_occurred
- 2018-09-14
- loss_usd
- $59,000,000
- source_id
- sm:zaif::2018-09-14
Related — same bug class· private-key