How much was lost in the EOS Lelego hack?

The EOS Lelego hack resulted in — in losses on November 19, 2018.

What attack technique was used in the EOS Lelego exploit?

The EOS Lelego exploit utilized Unknown. Understanding this attack vector is critical for smart contract auditors and developers building secure DeFi protocols.

How can developers prevent similar smart contract attacks?

Preventing smart contract hacks requires a combination of secure coding practices, thorough security audits, and understanding common attack vectors like reentrancy, oracle manipulation, and access control flaws. Smart Contract Hacking (SCH) provides hands-on training to help developers and auditors identify and prevent vulnerabilities before deployment.

EOS Lelego Hack

TOTAL LOST —

Nov 19, 2018 Unknown eos

Affected Chain eos Incident surface

Recovered - No recovery reported

All-Time Rank #2509 By amount stolen

Year 2018 Incident year

Incident Report

Protocol / Project EOS Lelego

Date of Incident November 19, 2018

Affected Chain(s) eos

Attack Technique Unknown

Classification Protocol Logic

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.

Technical Knowledge Deep understanding of unknown and Solidity and EVM internals

Capital Required Seed capital to cover gas and initial position setup

On-Chain Access Ability to interact with eos smart contracts and deploy a custom exploit contract

Protocol Analysis Identification of the exploitable vulnerability in EOS Lelego's contract logic - root cause: protocol logic

Execution Speed Precise transaction ordering and timing to exploit the vulnerability within a single atomic block

Obfuscation Plan A strategy to launder and move stolen funds - typically through mixers, cross-chain bridges, or decentralized DEX swaps to resist tracing

What Auditors Should Check

Could this have been caught in audit? Likely, with a thorough Unknown audit checklist and test coverage

If you're auditing a protocol with similar architecture to EOS Lelego, these are the critical security checks that could have prevented this incident (November 2018).

Verify all logic paths related to Unknown 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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Threat Assessment

Severity Level

UNKNOWN

Attack Vector Unknown
Root Cause Protocol Logic
Year 2018

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Incident Report

What the Attacker Needed to Succeed

What Auditors Should Check

Related Hacks - Unknown

Learn to Prevent the Next EOS Lelego