Incident Overview
On July 10, 2020, one of the OTC Transaction managers in East Delhi, India, was involved in an incident. On the 8th of July 2020, the employee reported a machine malfunction with the systems provided to him by the company. As a result, he requested to work from his own computer and created many alternative online wallets on platforms like Blockchain.com, Huobi, and others. The team made an exception and authorized him to do so while keeping the current OTC deals/transactions in mind.
Hackers gained access to the employee's PC while active browser sessions were open. The hackers employed a number of methods, including phishing, malware, and other attacks. The Bitcoins were sent to 14RYUUaMW1shoxCav4znEh64xnTtL3a2Ek, from where they are being distributed to other wallets:
https://www.blockchain.com/btc/address/14RYUUaMW1shoxCav4znEh64xnTtL3a2Ek
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 Cashaa, these are the critical security checks that could have prevented this incident (July 2020).
- 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 Cashaa
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