How much was lost in the Carousel Finance hack?

The Carousel Finance hack resulted in — in losses on August 30, 2021.

What attack technique was used in the Carousel Finance exploit?

The Carousel Finance 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.

Carousel Finance Hack

TOTAL LOST —

Aug 30, 2021 Rugpull polygon

Affected Chain polygon Incident surface

Recovered - No recovery reported

Same Technique 865 Total incidents

Protocol Type Dexs Target category

Incident Overview

Cronus Finance is an AMM decentralised exchange (DEX) built on Evmos

Incident Report

Protocol / Project Carousel Finance

Date of Incident August 30, 2021

Affected Chain(s) polygon

Attack Technique Rugpull

Classification Token

Primary Source View Post-Mortem

Protocol Information

Protocol Type Dexs

Affected Token Carousel Finance

Official Website suspended.hawkhost.com/

Protocol Twitter/X @CronusFinance

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 polygon smart contracts and deploy a custom exploit contract

Protocol Analysis Identification of the exploitable vulnerability in Carousel Finance'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 Carousel Finance, these are the critical security checks that could have prevented this incident (August 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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Sources & References

01
Source 1 https://suspended.hawkhost.com/

Threat Assessment

Severity Level

UNKNOWN

Attack Vector Rugpull
Root Cause Token
Year 2021

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