Incident Overview
UN Token was exploited via a flash loan attack, the exploiter profited 26,558 $USD.
UN token is a BEP20 token trading on its own pool. The pool with unverified source code was exploited via a flash loan attack. The exploiter took 29,100 $USD to perform malicious actions and was able to drain 55,658 $USD from the pool.
The total profit of the attacker reached 26,558 $USD.
Attacker Address:
https://bscscan.com/address/0xf84efa8a…131366
Malicious transaction:
https://bscscan.com/tx/0xff551526…1c5b8b
Incident Report
Protocol Information
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 UN Token, these are the critical security checks that could have prevented this incident (June 2023).
- Verify all logic paths related to Flash Loan Attack are guarded by proper access controls and input validation - see the Flash Loans 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 UN Token
The UN Token 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.