How much was lost in the MMFinance hack?

The MMFinance hack resulted in $215K in losses on August 13, 2022.

What attack technique was used in the MMFinance exploit?

The MMFinance exploit utilized Rugpull. 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.

MMFinance Hack

TOTAL LOST $215K

Low Aug 13, 2022 Rugpull

Affected Chain 2022 Incident surface

Recovered - No recovery reported

All-Time Rank #1269 By amount stolen

Auditors 1 Prior security audit

Incident Overview

Quick Summary

The MMF project has been rug pulled by its project deployer. The team made away with $BNB 726 in profits. This project should not be confused with the popular MMFinance farm on Cronos.

Block Data Reference

Project Deployer

https://bscscan.com/address/0x648361c2…089fbe

Incident Report

Protocol / Project MMFinance

Date of Incident August 13, 2022

Attack Technique Rugpull

Classification Token

Primary Source View Post-Mortem

Protocol Information

Protocol Type Yield

Affected Token MMF

Official Website umami.finance

Protocol Twitter/X @umamifinance

Team Anonymous

Source Code Unverified

Market Context at Time of Hack

Token Categories

Arbitrum Ecosystem

Protocol Links

Discord

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 rugpull and Solidity and EVM internals

Capital Required Seed capital to cover gas and initial position setup

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

Protocol Analysis Identification of the exploitable vulnerability in MMFinance'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? Hard to catch — private key / OpSec failures are outside smart contract audit scope

Audited by Audit Report 1 — still lost $215K. Prior audits don't guarantee safety, especially after post-audit code changes.

If you're auditing a protocol with similar architecture to MMFinance, these are the critical security checks that could have prevented this incident (August 2022).

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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Security Audit History

Audit Report 1 Report

Sources & References

01
Source 1 https://dexscreener.com/bsc/0x1288392e264715a179f7d91a47522e61bf1a8185

Threat Assessment

Severity Level

LOW

Attack Vector Rugpull
Root Cause Token
Year 2022

Learn to Prevent the Next MMFinance

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