Incident Overview
On March 21, 2025, Zoth (Ethereum) was exploited for $8.32 million due to admin privilege leakage, allowing the attacker to replace the logic contract with a malicious one.
The attacker gained unauthorized admin privileges, enabling them to upgrade Zoth’s logic contract to a malicious version. This tampered contract allowed the attacker to siphon funds from the protocol. The hacker’s initial funding came from address 0x3b33c5cd..., and the stolen assets were transferred to 0x7b0cd0d8....
The exploit suggests a private key compromise or an access control vulnerability, leading to full control over contract logic and fund withdrawals.
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 Zoth, these are the critical security checks that could have prevented this incident (March 2025).
- 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 Zoth
The Zoth 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.