How a Brute Force Attack Unmasked a Ransomware Infrastructure Network

Huntress investigators traced a successful RDP brute-force compromise that led to manual credential harvesting and domain enumeration; pivots from Windows telemetry to TLS certificate fingerprints uncovered a geo-distributed infrastructure (specialsseason.com, 1vpns.com) and VPN service tied to ransomware activity and initial access brokers, with multiple IOCs and certificate hashes provided for detection and remediation.