Longhorn: Tools used by cyberespionage group linked to Vault 7

Symantec links the Longhorn espionage group to Vault 7 leaked tooling, describing multiple custom backdoors (Corentry, Plexor, LH1/LH2), use of zero-day exploits, bespoke C2 and cryptographic protocols, and targeted operations against ~40 organizations across 16 countries; the report describes distinctive tradecraft, compilation/timeline correlations with Vault 7 documents, and protections/detections provided by Symantec.