TwitFi Hack

TOTAL LOST $137K
Low Other

Summarize with AI

ChatGPT Perplexity Claude Grok
Affected Chain 2023 Incident surface
Recovered - No recovery reported
All-Time Rank #1420 By amount stolen
Auditors 1 Prior security audit

Incident Overview

Quick Summary

The TwitFi token was exploited resulting in a significant amount of ETH being taken due to a miscalculation by the off-chain validator.

Details of the Exploit

The TwitFi token (TWT) has fallen victim to exploitation, leading to a loss of approximately 87 ETH ($137.3k), as the exploiter took advantage of the transfer function to send the tokens to the Reward Contract. Subsequently, the off-chain validator erroneously calculated the claimReward() amount, which the exploiter exploited further by calling the function and transferring the tokens before creating a new EOA and ultimately liquidating all the tokens.

Incident Report

Protocol / Project TwitFi
Date of Incident
Attack Technique Other
Classification NFT
Primary Source View Post-Mortem

Protocol Information

Protocol Type Dexs
Affected Token TWT
Official Website twitfi.com/
Protocol Twitter/X @TwitFi_official
Team Anonymous
Source Code Unverified

Market Context at Time of Hack

Token Categories
Mineable
Protocol Links
GitHub Discord

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 other 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 TwitFi'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? Likely — with a thorough Other audit checklist and test coverage
Audited by Audit Report 1 — still lost $137K. Prior audits don't guarantee safety, especially after post-audit code changes.

If you're auditing a protocol with similar architecture to TwitFi, these are the critical security checks that could have prevented this incident (February 2023).

  • Verify all logic paths related to Other 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

Sources & References

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