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Binance hot wallet drained of $2.5B after EIP-7702 delegation signatures

Technical analysis reveals signing without key possession

1 Oct 30 · 12d ago · 3 posts · 2 sources · development 1 of 1

Detailed analysis of the attack mechanism shows the attacker obtained fifty valid signatures for a nonce window (18914775–18914824) without possessing the wallet's private key. The attacker practiced the attack on throwaway accounts before targeting Binance 14, using a carrier address that was empty two days prior. The signing service and policy engine were unable to prevent the attack due to the properties of EIP-7702 authorization.

“A signing service that is handed 32-byte digests, the hashes it signs without seeing what they hash, cannot tell this one from a transaction hash.”

808bits analysis

Binance Compromised exchange0xQuit Ethereum analyst

The whole story posts the bright band is this development · numbered dots are the others · click one to jump

Peak 2 pieces in 3h at Oct 30, 12 PM; 3 pieces over 13 days (3 posts) Oct 30, 3 AM — 1 piece · 1 post — Hacker News 1Oct 30, 6 AM — quietOct 30, 9 AM — quietOct 30, 12 PM — 2 pieces · 2 posts — Hacker News 1, Mastodon 1Oct 30, 3 PM — quietOct 30, 6 PM — quietOct 30, 9 PM — quietOct 31, 12 AM — quietOct 31, 3 AM — quietOct 31, 6 AM — quietOct 31, 9 AM — quietOct 31, 12 PM — quietOct 31, 3 PM — quietOct 31, 6 PM — quietOct 31, 9 PM — quietNov 1, 12 AM — quietNov 1, 2 AM — quietNov 1, 5 AM — quietNov 1, 8 AM — quietNov 1, 11 AM — quietNov 1, 2 PM — quietNov 1, 5 PM — quietNov 1, 8 PM — quietNov 1, 11 PM — quietNov 2, 2 AM — quietNov 2, 5 AM — quietNov 2, 8 AM — quietNov 2, 11 AM — quietNov 2, 2 PM — quietNov 2, 5 PM — quietNov 2, 8 PM — quietNov 2, 11 PM — quietNov 3, 2 AM — quietNov 3, 5 AM — quietNov 3, 8 AM — quietNov 3, 11 AM — quietNov 3, 2 PM — quietNov 3, 5 PM — quietNov 3, 8 PM — quietNov 3, 11 PM — quietNov 4, 2 AM — quietNov 4, 5 AM — quietNov 4, 8 AM — quietNov 4, 11 AM — quietNov 4, 2 PM — quietNov 4, 5 PM — quietNov 4, 8 PM — quietNov 4, 11 PM — quietNov 5, 2 AM — quietNov 5, 5 AM — quietNov 5, 8 AM — quietNov 5, 11 AM — quietNov 5, 2 PM — quietNov 5, 5 PM — quietNov 5, 8 PM — quietNov 5, 11 PM — quietNov 6, 2 AM — quietNov 6, 5 AM — quietNov 6, 8 AM — quietNov 6, 11 AM — quietNov 6, 2 PM — quietNov 6, 5 PM — quietNov 6, 8 PM — quietNov 6, 11 PM — quietNov 7, 2 AM — quietNov 7, 5 AM — quietNov 7, 8 AM — quietNov 7, 11 AM — quietNov 7, 2 PM — quietNov 7, 5 PM — quietNov 7, 8 PM — quietNov 7, 11 PM — quietNov 8, 2 AM — quietNov 8, 5 AM — quietNov 8, 8 AM — quietNov 8, 11 AM — quietNov 8, 2 PM — quietNov 8, 5 PM — quietNov 8, 8 PM — quietNov 8, 11 PM — quietNov 9, 2 AM — quietNov 9, 5 AM — quietNov 9, 8 AM — quietNov 9, 11 AM — quietNov 9, 2 PM — quietNov 9, 5 PM — quietNov 9, 8 PM — quietNov 9, 11 PM — quietYesterday, 2 AM — quietYesterday, 5 AM — quietYesterday, 8 AM — quietYesterday, 11 AM — quietYesterday, 2 PM — quietYesterday, 5 PM — quietYesterday, 8 PM — quietYesterday, 11 PM — quietToday, 2 AM — quietToday, 5 AM — quietToday, 8 AM — quietToday, 11 AM — quietToday, 2 PM — quietToday, 5 PM — quietToday, 8 PM — quiet 1
1Technical analysis reveals signing…
Oct 31Nov 1Nov 2Nov 3Nov 4Nov 5Nov 6Nov 7Nov 8Nov 9yesterdaynow · 11:13 PM ET

All 1 developments of Binance hot wallet drained of $2.5B after EIP-7702… →

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