Incident Overview
Melody project was exploited for 2225 $BNB. The hacker was able to withdraw $SNS tokens using an off-chain vulnerability.
Melody is a GameFi and SocialFi project providing passive income opportunities to creative people. The project's signature check function was exploited by the attacker, which gained $SNS tokens and swapped them for 2225 $BNB. All the stolen amount was sent to another EOA address.
Attacker addresses:
https://bscscan.com/address/0xa3793ccb…7e43a0
https://bscscan.com/address/0x7ce402b6…25408a
https://bscscan.com/address/0x1e091ae0…cebdb7
Malicious transactions:
https://bscscan.com/tx/0x7fd61155…9dea8f
https://bscscan.com/tx/0xe10c76cb…b59e83
Incident Report
Protocol Information
Market Context at Time of Hack
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.
What Auditors Should Check
If you're auditing a protocol with similar architecture to Melody, 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.
Free TrialRelated Attack Classes
The technique used in this hack maps to these vulnerability classes in our security curriculum:
Sources & References
Learn to Prevent the Next Melody
The Melody 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.