Incident Report: sFLR and USDT0 Token Drain via Approval Phishing

Incident Type: Approval Phishing Attack

Total Losses: $201,724.26 (126,724.26, USD (in sFLR) + $75,000 in USDT0)


Summary

Users on Flare Network lost sFLR and USDT0 tokens after approving to what was probably a fake lending protocol contract. The attacker tricked victims into granting unlimited spending permissions, then drained their wallets weeks later.

Critical finding: The sFLR and USDT0 smart contracts work correctly. Users approved to malicious contracts and should revoke approvals.


Recommended Action

Users on Flare who made approvals to Teralend should revoke those approvals.

One way to do this is using revoke.cash as follows:

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Connect your wallet at the top right button

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Select the network Flare

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Look for the approved Spender:

0x0AbcA7776D419dBC1E5548DF25748B7463f6428e or 0x5213a4843626107342e26E630CC80F979805087a

and press the revoke button on the right side of the entry.