EXECUTIVE SUMMARY:
RansomHub is a growing Ransomware-as-a-Service (RaaS) platform, known for its broad OS compatibility and high affiliate payouts, offering affiliates up to 90% of ransom proceeds. This generous structure has attracted cybercriminals from established groups like ALPHV (BlackCat) and LockBit. RansomHub targets a range of systems, including Windows, Linux, and ESXi environments, making it versatile and appealing to attackers seeking high-value targets. Its rapid rise reflects the increasing profitability of modern ransomware operations.
RansomHub’s attacks typically begin with phishing or exploiting weak remote desktop protocols. Once inside, attackers deploy a Python-based backdoor, enabling stealthy communication with the attacker's infrastructure. The ransomware encrypts files using dual encryption and appends a 32-byte master public key to each file. Affiliates also use tools like Mimikatz for credential theft, escalating privileges and maintaining persistence within compromised systems. This multi-layered approach makes RansomHub effective at evading detection and maximizing impact.
RansomHub’s rise signals a shift in ransomware tactics, with more cybercriminals using decentralized affiliate models. To defend against such threats, organizations should prioritize strong endpoint security, network segmentation, and staff training to recognize phishing attempts. Regular data backups and effective monitoring are essential for minimizing the impact of ransomware. By adopting these proactive measures, companies can better protect themselves from evolving ransomware threats like RansomHub.
THREAT PROFILE:
| Tactic | Technique ID | Technique |
| Initial Access | T1071 | Application Layer Protocol |
| Execution | T1059 | Command and Scripting Interpreter |
| Command and Control | T1105 | Ingress Tool Transfer |
| Defense Evasion | T1075 | Use Alternate Authentication Material |
| T1070 | Indicator Removal | |
| Credential Access | T1003 | OS Credential Dumping |
| T1081 | Unsecured Credentials | |
| Impact | T1486 | Data Encrypted for Impact |
REFERENCES:
The following reports contain further technical details: