QAN Platform Hack

TOTAL LOST $1.2M
Medium Access Control

Summarize with AI

ChatGPT Perplexity Claude Grok
Affected Chain 2022 Incident surface
Recovered - No recovery reported
All-Time Rank #781 By amount stolen
Auditors 1 Prior security audit

Incident Overview

Quick Summary

QAN Platform Bridge was hacked due to a private key compromise. The hacker gained access to the private key of the bridge deployer address and withdrew $QANX tokens from the bridge contract on both Ethereum and BSC chains.

Details of the Exploit

QAN Platform is the bridge between Ethereum and BSC chains. The hacker compromised the private keys of the bridge contract deployer and withdrew 1,444,000,000 $QANX tokens from the BSC chain and 1,459,000,000 $QANX tokens from the Ethereum chain. Consequently, the attacker swapped $QANX tokens which led to a drop in the token price by more than 99%.

The hacker managed to withdraw 1,165,500 $USD worth of assets through TornadoCash.

Block Data Reference

Attacker addresses:

https://bscscan.com/address/0xf163a6ca…d4fb11

https://etherscan.io/address/0xf163a6ca…d4fb11

Malicious transactions:

https://bscscan.com/tx/0xf93047e4…a13f51

https://etherscan.io/tx/0x048a1a71…51fe82

https://etherscan.io/tx/0x39ec0a6b…74080f

This is classified as a Access Control Attacks . Compare similar hacks →

Incident Report

Protocol / Project QAN Platform
Date of Incident
Attack Technique Access Control
Classification Bridge
Primary Source View Post-Mortem #1 View Post-Mortem #2

Protocol Information

Protocol Type Exploit/Access control
Affected Token QANX
Official Website qanplatform.com/en
Protocol Twitter/X @QANplatform
Team Public / Doxxed
Source Code Verified On-Chain

Market Context at Time of Hack

Token Categories
DeFi Quantum-Resistant Ethereum Ecosystem BNB Chain Ecosystem
Protocol Links
GitHub Reddit

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 Operational-security tradecraft (phishing, malware, leaked seed phrases, or insider access) to obtain treasury signing authority
Capital Required Minimal capital - only enough to cover gas while draining the compromised accounts
On-Chain Access Valid signing authority over the compromised wallets / multisig signers, allowing direct transfer of funds or stake authorization
Target Reconnaissance Identification of QAN Platform's high-value treasury accounts and the authority / multisig structure controlling them
Execution Speed Speed to drain the compromised accounts before the team detects the breach and revokes signing authority or freezes the assets
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 Access Control audit checklist and test coverage
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 QAN Platform, these are the critical security checks that could have prevented this incident (October 2022).

  • Verify all logic paths related to Access Control are guarded by proper access controls and input validation - see the Access Control Attacks attack class for patterns
  • 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

Related Attack Classes

The technique used in this hack maps to these vulnerability classes in our security curriculum:

See all Access Control Attacks examples →

Access Control Attacks

Sources & References

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