Incident Overview
On October 31, 2024, the centralized cryptocurrency exchange M2, endorsed by David O'Leary and based in Abu Dhabi, experienced a hack resulting in a $13.7 million loss from multiple hot wallets.
The October 31 attack targeted M2’s hot wallets, resulting in the unauthorized transfer of Bitcoin, Ether, and Solana assets valued at nearly $13.7 million. According to on-chain investigator ZachXBT, the breach was carried out by attackers leveraging a vulnerability within the exchange’s online wallet infrastructure. The stolen assets were transferred away from M2’s wallets over a brief period, despite the exchange's swift response to prevent further escalation.
M2 immediately suspended affected wallets, activated additional security controls, and restored user funds, resuming normal operations shortly after. This quick action limited the duration of exposure, though the initial vulnerability remains under investigation, with further insights expected as M2 collaborates with cybersecurity and law enforcement agencies.
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 M2, these are the critical security checks that could have prevented this incident (October 2024).
- 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 M2
The M2 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.