How much was lost in the CheddaToken hack?

The CheddaToken hack resulted in $1.2M in losses on April 19, 2022.

What attack technique was used in the CheddaToken exploit?

The CheddaToken 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.

CheddaToken Hack

TOTAL LOST $1.2M

Medium Apr 19, 2022 Rugpull

Affected Chain 2022 Incident surface

Recovered - No recovery reported

All-Time Rank #796 By amount stolen

Auditors 1 Prior security audit

Incident Overview

Quick Summary

CheddaToken was rugged by the privileged role. The CHEDDA token was dumped with losses of about 1.2M $USD,

Details of the Exploit

The function `emergencyRewardWithdraw` was invoked by the owner. It allows the caller to take off the available CHEDDA token balance in the MasterChef. After that the tokens were sold which led to significant price dumping.

Block Data Reference

Onwer addresses:

https://etherscan.io/address/0xb0d51fb4…8d97e3

emergencyRewardWithdraw transaction:

https://etherscan.io/tx/0xff904928…2b5733

https://etherscan.io/tx/0x685b3d39…25608d

Incident Report

Protocol / Project CheddaToken

Date of Incident April 19, 2022

Attack Technique Rugpull

Classification Token

Primary Source View Post-Mortem

Protocol Information

Protocol Type Exit Scam/Rugpull

Affected Token CHEDDA

Official Website www.a-ha.io/

Protocol Twitter/X @CheddaToken

Team Anonymous

Source Code Unverified

Market Context at Time of Hack

Token Categories

Web3

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 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 CheddaToken'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 Certik — still lost $1.2M. Prior audits don't guarantee safety, especially after post-audit code changes.

If you're auditing a protocol with similar architecture to CheddaToken, these are the critical security checks that could have prevented this incident (April 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

Certik 2022-02-15 Report unavailable

Sources & References

01
Source 1 https://twitter.com/CertiKAlert/status/1516600521540390914?s=20

Threat Assessment

Severity Level

MEDIUM

Attack Vector Rugpull
Root Cause Token
Year 2022

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