How much was lost in the Nemo Finance hack?

The Nemo Finance hack resulted in $32K in losses on October 26, 2020.

What attack technique was used in the Nemo Finance exploit?

The Nemo Finance exploit utilized Honeypot. 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.

Nemo Finance Hack

TOTAL LOST $32K

Low Oct 26, 2020 Honeypot ethereum

Affected Chain ethereum Incident surface

Recovered - No recovery reported

All-Time Rank #1816 By amount stolen

Auditors 1 Prior security audit

Incident Overview

The contract owner could disable the transfer function, which restricted users in selling their tokens.

The contract deployer added initial liquidity at:

https://etherscan.io/tx/0xda2135fc…7fc09a

The contract deployer used hidden minting functionality under the addWork() function to generate new tokens onto his wallet at:

https://etherscan.io/tx/0xfb014977…9bacba

The minted tokens were sold by the contract deployer:

https://etherscan.io/tx/0x74f351d3…690dd0

https://etherscan.io/tx/0x579aacf1…e533ea

https://etherscan.io/tx/0x230f8d19…e12178

https://etherscan.io/tx/0x95fb7e01…5df5bc

The stolen funds were transferred to the external wallet:

https://etherscan.io/tx/0x6989211c…862122

Incident Report

Protocol / Project Nemo Finance

Date of Incident October 26, 2020

Affected Chain(s) ethereum

Attack Technique Honeypot

Classification Token

Primary Source View Post-Mortem

Protocol Information

Protocol Type Liquid Restaking

Affected Token NEMO

Official Website nemo.finance/

Protocol Twitter/X @neemofinance

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 honeypot and Solidity and EVM internals

Capital Required Seed capital to cover gas and initial position setup

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

Protocol Analysis Identification of the exploitable vulnerability in Nemo Finance's contract logic - root cause: token

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 Honeypot audit checklist and test coverage

Audited by Audit Report 1 — still lost $32K. Prior audits don't guarantee safety, especially after post-audit code changes.

If you're auditing a protocol with similar architecture to Nemo Finance, these are the critical security checks that could have prevented this incident (October 2020).

Verify all logic paths related to Honeypot 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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Security Audit History

Audit Report 1 Report

Sources & References

01
Source 1 https://twitter.com/bLd77/status/1321059093394706433

Threat Assessment

Severity Level

LOW

Attack Vector Honeypot
Root Cause Token
Year 2020

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