Incident Overview
The contract deployer has minted tokens onto his wallet at:
https://etherscan.io/tx/0xf4d022e0…eb4861
The contract deployer added initial liquidity at:
https://etherscan.io/tx/0x530ad85a…53c4ad
The contract deployer transferred tokens to the external address:
https://etherscan.io/tx/0xc4eb2dc3…5282f7
The recipient has sold tokens in multiple transactions:
https://bloxy.info/txs/calls_from/0x22b3d80f…795ed8?signature_id=1102188&smart_contract_address_bin=0x7a250d56…f2488d
The contract deployer removed liquidity at:
https://etherscan.io/tx/0x7c553b24…c497f8
Incident Report
Protocol Information
What the Attacker Needed to Succeed
Understanding the prerequisites for this type of attack helps auditors identify protocols that are most at risk and helps developers build better defenses.
What Auditors Should Check
If you're auditing a protocol with similar architecture to Ohohoh.io, these are the critical security checks that could have prevented this incident (January 2021).
- Verify all logic paths related to Rugpull are guarded by proper access controls and input validation
- Review privileged functions (owner, admin, governance) for potential abuse vectors - centralization risks should be documented and bounded with timelocks or multi-sigs
Master these auditing techniques with hands-on labs and real exploit scenarios in the Smart Contract Hacking course.
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The Ohohoh.io hack is one of many attacks that skilled auditors are trained to detect before deployment. Master real exploit patterns and defense techniques with hands-on Web3 security training.