What happened
B² Network reported unauthorised access to its B2 staking-contract upgrade authority, after which approximately 8.59M B2 was withdrawn on BNB Chain with a nominal value of about $3.86M.
Technical root cause
Unauthorised access to the staking contract's upgrade authority allowed the attacker to control the upgrade path and drain the staking service.
How it happened
The attacker used the compromised upgrade-control path to drain B2 from the staking contract, sold the tokens for BNB, and moved proceeds across chains.
Protocol details
Understand the attack patterns
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