CryptoJoker
Intelligence Profile
CryptoJoker is an open source ransomware written in C#.
CryptoJoker uses a combination of a "custom XOR" encryption and RSA. A private public/private pair key is generated for every computer.
Threat Analysis
CryptoJoker is a malware family tracked by threat intelligence researchers and catalogued in the Malpedia dataset. It represents a distinct malicious software lineage with identifiable code characteristics, behaviors, and victimology.
Financially motivated threat actors like CryptoJoker prioritize monetary gain through methods such as ransomware deployment, banking trojans, cryptocurrency theft, BEC scams, or credential harvesting for resale on underground markets.
With high sophistication, CryptoJoker is capable of targeted intrusions using adapted commodity tools alongside custom implants, maintaining operational security and evading standard detection mechanisms.