Viettel Group is a organization tracked across 1 threat cluster and 1 intelligence report mention on ThreatCluster. First observed May 8, 2026; most recent activity May 8, 2026.
A sophisticated spear-phishing campaign, named Operation GriefLure, has been identified, targeting senior executives in Vietnam and the Philippines. The campaign employs a modular remote access trojan (RAT) capable of…