The administrator keys related to the Echo Protocol Monad deployment were compromised, affecting approximately $816,000 in assets

Echo Protocol announced that its eBTC deployment on Monad experienced unauthorized activity, resulting in abnormal minting and financial losses. Preliminary investigations indicate that the issue stemmed from the compromise of the administrator keys related to the Monad deployment, with approximately $816,000 in assets currently confirmed to be affected.

Echo stated that the Monad network itself was not affected and continues to operate normally. The team has regained control of the administrator keys and has destroyed the remaining 955 eBTC held by the attacker. The project further clarified: the current incident appears to be limited to the Monad deployment; there is no evidence to suggest that the Aptos side has been affected; aBTC on Aptos and eBTC on Monad are independent, non-bridgeable assets; the current related risk exposure on Aptos is approximately $71,000.

As an additional precaution, Echo has suspended the cross-chain functionality of the Monad deployment and has begun upgrading the related EVM bridging contracts and permission control mechanisms, while reminding users not to interact with any unofficial claims, refund, or recovery pages.