Incident Overview
UNMS protocol on BSC chain was attacked resulting with losses worth of $100k.
- The attacker used a 191,375 $USDT token flash loan to break protocol math logic.
- Created an opportunity for withdrawing 189452864815631476477918587 UNMS from the contract and sold for 100k $USDT.
Exploit tx:
https://bscscan.com/tx/0x5feb28c3…53a344
Exploiter:
https://bscscan.com/address/0xca357e19…620354
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 UNMS, these are the critical security checks that could have prevented this incident (March 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 UNMS
The UNMS 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.