Majin Buu Hack

TOTAL LOST $168K
Low Rugpull

Summarize with AI

ChatGPT Perplexity Claude Grok
Affected Chain 2023 Incident surface
Recovered - No recovery reported
All-Time Rank #1360 By amount stolen
Protocol Type Exit Scam/Rugpull Target category

Incident Overview

Quick Summary

Majin Buu project was rugpulled by the deployer, removing liquidity worth 168,213 $USD from UniSwap pool.

Details of the Exploit

Majin Buu (BUU) is an ERC20 token trading on UniSwap. The deployer added 38 $ETH as liquidity on July 31 and then removed 129.87 $ETH on August 1. This significant liquidity removal led to a rugpull, with the deployer stealing funds equating to 168,213 $USD at the time of the scam.

The stolen funds were initially transferred to another EOA address and subsequently distributed between several other addresses. The website of the project was shutdown at the moment.

Block Data Reference

Deployer Address:

https://etherscan.io/address/0x690F2Be8…91132D

Scammer Address:

https://etherscan.io/address/0x6d99a6ac…67666f

Liquidity Removal Transaction:

https://etherscan.io/tx/0xba394684…becf52

Incident Report

Protocol / Project Majin Buu
Date of Incident
Attack Technique Rugpull
Classification Token
Primary Source View Post-Mortem

Protocol Information

Protocol Type Exit Scam/Rugpull
Affected Token BUU
Official Website majinbuu.xyz/
Protocol Twitter/X @MajinBuuuDB
Team Anonymous
Source Code Verified On-Chain

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 Majin Buu'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

If you're auditing a protocol with similar architecture to Majin Buu, these are the critical security checks that could have prevented this incident (August 2023).

  • 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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Sources & References

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