SquareShell is a malware family tracked across 1 threat cluster and 1 intelligence report mention on ThreatCluster. First observed July 14, 2026; most recent activity July 14, 2026.
A suspected China-aligned threat group, tracked as UNK_MassTraction, has been exploiting vulnerabilities in Roundcube mail servers at U.S. and Canadian universities since May 2026. The campaign targets physics and…