DuelBits Hack

TOTAL LOST $4.6M
Medium Private Key Compromised / Access Control ethereum

Summarize with AI

ChatGPT Perplexity Claude Grok
Affected Chain ethereum Incident surface
Recovered - No recovery reported
All-Time Rank #448 By amount stolen
Protocol Type Exploit/Access control Target category

Incident Overview

Quick Summary

Duelbits crypto casino was exploited through access control breach, resulting in a loss of 4,643,315 USD.

Details of the Exploit

Duelbits, a crypto casino and sports betting platform, experienced an exploit on February 13, 2024. The attacker gained access to a Duelbits wallet. The root cause of this exploit appears to be a loss of wallet access control.

The attacker stole various assets, including ETH, BNB, BUSD, USDT, SHIBA INU, and ApeCoin, totaling a loss of 4,643,315 USD. The stolen funds were bridged, exchanged to ETH, and transferred to another EOA address.

Block Data Reference

Attacker Address:

https://bscscan.com/address/0x3933924F…46a666

Funds Holder Address as of Feb 15, 2024:

https://bscscan.com/address/0x0428eEfB…7645f5

Malicious Transactions:

https://bscscan.com/tx/0x3bf414c5…999aa4

https://bscscan.com/tx/0x554d974b…55c580

https://bscscan.com/tx/0xe22ab335…f3be7e

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

Incident Report

Protocol / Project DuelBits
Date of Incident
Affected Chain(s) ethereum
Attack Technique Private Key Compromised / Access Control
Classification Infrastructure / Other
Primary Source View Post-Mortem

Protocol Information

Protocol Type Exploit/Access control
Official Website duelbits.com/
Protocol Twitter/X @Duelbits
Team Anonymous
Source Code Unverified

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 DuelBits'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? Hard to catch — private key / OpSec failures are outside smart contract audit scope

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

  • Verify all logic paths related to Private Key Compromised / 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.

Free Trial

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

Browse all hacks

These hacks used the same attack technique. Understanding the pattern helps prevent future exploits.

Resolv $25.0M
Private Key Compromised / Access Control
IoTeX $8.0M
Private Key Compromised / Access Control
Step Finance $40.0M
Private Key Compromised / Access Control
DIMO $40K
Private Key Compromised / Access Control
BtcTurk $48.0M
Private Key Compromised / Access Control
CrediX $4.5M
Private Key Compromised / Access Control

Learn to Prevent the Next DuelBits

The DuelBits hack is one of many attacks that skilled auditors are trained to detect before deployment. Master real exploit patterns and defense techniques with hands-on Web3 security training.

Start Free Trial Browse Attack Library
Recreate exploit patterns safely Free Trial