Incident Overview
DeFi 100 website was hacked with a profane message claiming a scam, causing panic among investors.
On May 22, a message appeared on the DeFi 100 website homepage claiming that the project had scammed its investors and they couldn't do anything about it. The message was signed by "DEVISIN" and was later deleted. On May 23, the DeFi100 Twitter account confirmed that their website had been hacked and the profane message was posted by the hacker.
The DeFi100 Twitter post about the incident:
https://twitter.com/DEFI100/status/1396361647149633537
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 DEFI100, these are the critical security checks that could have prevented this incident (May 2021).
- Verify all logic paths related to Rugpull are guarded by proper access controls and input validation
- 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.
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Learn to Prevent the Next DEFI100
The DEFI100 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.