How much was lost in the ThalaSwap hack?

The ThalaSwap hack resulted in $25.5M in losses on November 15, 2024.

What attack technique was used in the ThalaSwap exploit?

The ThalaSwap exploit utilized Drained Liquidity Pool. 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.

ThalaSwap Hack

TOTAL LOST $25.5M

High #196 All-Time Nov 15, 2024 Drained Liquidity Pool aptos

Affected Chain aptos Incident surface

Recovered - No recovery reported

All-Time Rank #196 By amount stolen

Auditors 1 Prior security audit

Incident Overview

Thala is a decentralized finance protocol powered by the Move language, enabling seamless borrowing of a decentralized, over-collateralized stablecoin in Move Dollar and capital-efficient liquidity provisioning via a rebalancing AMM on the Aptos blockchain

Incident Report

Protocol / Project ThalaSwap

Date of Incident November 15, 2024

Affected Chain(s) aptos

Attack Technique Drained Liquidity Pool

Classification Protocol Logic

Primary Source View Post-Mortem

Protocol Information

Protocol Type Dexs

Smart Contract Language Move

Official Website www.thala.fi/

Protocol Twitter/X @ThalaLabs

Market Context at Time of Hack

Token Categories

Ethereum Ecosystem Polygon Ecosystem BNB Chain Ecosystem Optimism Ecosystem Linea 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 drained liquidity pool and Solidity and EVM internals

Capital Required Seed capital to cover gas and initial position setup

On-Chain Access Ability to interact with aptos smart contracts and deploy a custom exploit contract

Protocol Analysis Identification of the exploitable vulnerability in ThalaSwap's contract logic - root cause: protocol logic

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 Drained Liquidity Pool audit checklist and test coverage

Audited by Audit Report 1 — still lost $25.5M. Prior audits don't guarantee safety, especially after post-audit code changes.

If you're auditing a protocol with similar architecture to ThalaSwap, these are the critical security checks that could have prevented this incident (November 2024).

Verify all logic paths related to Drained Liquidity Pool 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

Sources & References

01
Source 1 https://cointelegraph.com/news/thala-recovers-25-million-exploit…

Threat Assessment

Severity Level

HIGH

Attack Vector Drained Liquidity Pool
Root Cause Protocol Logic
Year 2024

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