How much was lost in the Cryptoger Club hack?

The Cryptoger Club hack resulted in $35K in losses on March 05, 2023.

What attack technique was used in the Cryptoger Club exploit?

The Cryptoger Club 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.

Cryptoger Club Hack

TOTAL LOST $35K

Low Mar 05, 2023 Rugpull

Affected Chain 2023 Incident surface

Recovered - No recovery reported

All-Time Rank #1793 By amount stolen

Auditors 1 Prior security audit

Incident Overview

Quick Summary

Cryptoger Club was rugpulled for 35,364 $USD worth of $BNB by the token deployer.

Details of the Exploit

Cryptoger Club is a BEP20 token trading on PancakeSwap. The token deployer and another EOA address removed liquidity for 105.2 $BNB from the pool and then transferred the stolen funds to several EOA addresses.

Block Data Reference

Scammer addresses:

https://bscscan.com/address/0x4ec683b0…d63408

https://bscscan.com/address/0xbcd9343f…6cbed0

Liquidity removal transactions:

https://bscscan.com/tx/0x52a9de0b…494c47

https://bscscan.com/tx/0x8855dc34…ce133c

Transfer transaction:

https://bscscan.com/tx/0x8d6d55dc…6ad4f0

Incident Report

Protocol / Project Cryptoger Club

Date of Incident March 05, 2023

Attack Technique Rugpull

Classification NFT

Primary Source View Post-Mortem

Protocol Information

Protocol Type Exit Scam/Rugpull

Affected Token CToger

Official Website cryptoger-club.gitbook.io/about/

Protocol Twitter/X @CryptogerClub

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 Cryptoger Club'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? Hard to catch — private key / OpSec failures are outside smart contract audit scope

Audited by Solidproof — still lost $35K. Prior audits don't guarantee safety, especially after post-audit code changes.

If you're auditing a protocol with similar architecture to Cryptoger Club, these are the critical security checks that could have prevented this incident (March 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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Security Audit History

Solidproof 2022-03-02 Report

Sources & References

01
Source 1 https://twitter.com/CertiKAlert/status/1633654937606569985?s=20

Threat Assessment

Severity Level

LOW

Attack Vector Rugpull
Root Cause NFT
Year 2023

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