How much was lost in the ChaddyFinance hack?

The ChaddyFinance hack resulted in $13K in losses on March 07, 2021.

What attack technique was used in the ChaddyFinance exploit?

The ChaddyFinance 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.

ChaddyFinance Hack

TOTAL LOST $13K

Low Mar 07, 2021 Rugpull binance

Affected Chain binance Incident surface

Recovered - No recovery reported

All-Time Rank #1925 By amount stolen

Auditors 2 Prior security audits

Incident Overview

The contract deployer added initial liquidity at:

https://bscscan.com/tx/0xebea5570…dde537

The contract deployer removed liquidity at:

https://bscscan.com/tx/0x5bc37002…c1eb0d

In addition, the project was holding a fundraising event using a Proxy smart contract:

https://bscscan.com/address/0x91889f13…def1a9#internaltx

The final token recipient was EOA, which then transferred raised presale funds into the contract deployer's address:

https://bscscan.com/tx/0x3fee8442…9e816f

https://bscscan.com/tx/0x015617cb…2bc3a7

https://bscscan.com/tx/0x9eb3ba01…2e4500

https://bscscan.com/tx/0xdd3b416c…60336b

Finally, stolen BNB tokens were bridged to the Binance Chain:

https://bscscan.com/tx/0xf3d7f902…ffe595

https://bscscan.com/tx/0xd932e3b0…636ca7

https://bscscan.com/tx/0x4bba48ca…2402c1

https://bscscan.com/tx/0x9ab59e08…777b67

Incident Report

Protocol / Project ChaddyFinance

Date of Incident March 07, 2021

Affected Chain(s) binance

Attack Technique Rugpull

Classification Yield Aggregator

Primary Source View Post-Mortem

Protocol Information

Protocol Type Yield

Affected Token Chaddy

Official Website chaddy.finance/

Protocol Twitter/X @ChaddyFinance

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 binance smart contracts and deploy a custom exploit contract

Protocol Analysis Identification of the exploitable vulnerability in ChaddyFinance's contract logic - root cause: yield aggregator

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, Audit Report 2 — still lost $13K. Prior audits don't guarantee safety, especially after post-audit code changes.

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

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
Audit Report 2 Report

Sources & References

01
Source 1 https://twitter.com/RugSteemer/status/1369415028378644496
02
Web Archive https://web.archive.org/web/20210308130718/https://chaddy.finance/

Threat Assessment

Severity Level

LOW

Attack Vector Rugpull
Root Cause Yield Aggregator
Year 2021

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