Monkey Kingdom Hack

TOTAL LOST $1.3M
Medium Other

Summarize with AI

ChatGPT Perplexity Claude Grok
Affected Chain 2021 Incident surface
Recovered $1.3M 100.0% returned
All-Time Rank #783 By amount stolen
Protocol Type Exploit/Other Target category

Incident Overview

The attacker's address:

https://solscan.io/account/HuiYfmAceFkmhu3yP8t3a6VMYfw3VSX2Ymqqj9M2k9ib

Monkey Kingdom's Discord was flooded with thousands of bots impersonating the Monkey Kingdom or Baepes announcements. They DM-ed users directing them to suspicious websites that require them to connect their wallets.

When the NFT presale began, the project's announcement channel on Discord was hijacked by the bot named "Monkey Kingdom". A Discord webhook got compromised and posted a phishing link to the Announcement channel.

The attacker was able to steal 316.8 WETH. Stolen funds were bridged through the Wormhole:

https://solscan.io/tx/oUbXHMm158RtzoGD3k5ys3y9SiBovQ1smKWANo1QmX144ovmz9bDsUWyhr3Yp9uEnUVZnnLMgXSxDjFvAVJtBs1

https://solscan.io/tx/47YYx62nvoeuVenY5iT4GA4LYiiNHd9nYmix69rVxw4DZU3FycQWbPy6ePWirMBEDEFfH3a5jW9wjzsuHFtzxz3D

https://solscan.io/tx/2pM5asqypGSjJSZjNf6m6MjoQWsc9vFg91UosukpSbZbxwN3BwmaFRnSa3vFERyZBzGDjTTxKD1h1dKkiaPfsjBt

https://solscan.io/tx/4MrJuXHeJLH2cBTzYT9Gjbe8pcXvHsRnF5E5ZnpGVkQ7v3gvDEchWVijMSWjwkF1FyxJXV1yjABs4HWh9tcDqaoM

Incident Report

Protocol / Project Monkey Kingdom
Date of Incident
Attack Technique Other
Classification NFT
Primary Source View Post-Mortem #1 View Post-Mortem #2

Protocol Information

Protocol Type Exploit/Other
Official Website monkeykingdom.io/
Protocol Twitter/X @MonkeyKingdom_
Team Anonymous
Source Code Unverified

Market Context at Time of Hack

Token Categories
Memes Solana Ecosystem Arbitrum Ecosystem BNB Chain Ecosystem
Protocol Links

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 other 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 Monkey Kingdom's contract logic - root cause: nft
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 Other audit checklist and test coverage

If you're auditing a protocol with similar architecture to Monkey Kingdom, these are the critical security checks that could have prevented this incident (December 2021).

  • Verify all logic paths related to Other 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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Funds Recovery

100.0%

Recovered

$1.3M

Net Loss

0

Sources & References

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