Threat Actor
masterblack
- First Reported
- Oct 12, 2026
- Latest Reported
- Oct 12, 2026
Reported Context (1)
- Online alias of the adversary associated with Operation Master, observed orchestrating attack campaigns between April and mid-September 2026. CyberXero Used Claude Code in Campaign That Stole 628,000+ Ukrainian Records
CVE (4)
Threat Actors (1)
MITRE ATT&CK (3)
Products (6)
Tools (3)
Industries (4)
Countries (5)
Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.