Incident Overview
The Citizen Finance platform suffered from an attack by a hacker who managed to obtain the private key of one of the Citizen Finance wallets and proceeded to steal $94k.
Citizen Finance is a platform where players are the true owners of their in-game assets. Players can stake, resell, gift them or use assets as a collateral.
Citizen Finance was attacked by a hacker who obtained a private key with access to the BSC and Polygon chains. The attacker used their access to transfer 244 $BNB, 57k $MATIC and 7k $USDC that attacker withdrew in these transactions:
1) https://bscscan.com/tx/0xcf24e276…403ab0
2) https://polygonscan.com/tx/0x3fe22048…88e4f7
The theft caused a price drop of the $CIFI token by more than 50%.
As the time of this writing information on this case is scarce. More sources will be added if the case should develop.
Account addresses where stolen funds are currently located:
(BSC) https://bscscan.com/address/0xac3dc7bb…f6ac2b
(Polygon) https://polygonscan.com/address/0xac3dc7bb…f6ac2b
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 Citizen Finance, these are the critical security checks that could have prevented this incident (July 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 TrialSecurity Audit History
- Audit Report 1 Report
Related Attack Classes
The technique used in this hack maps to these vulnerability classes in our security curriculum:
Sources & References
Learn to Prevent the Next Citizen Finance
The Citizen Finance 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.