CL-STA-0954 (UNC5820) chains FortiJump and CVE-2025-61624 to deploy memory-resident PEERSTITCH on FortiGate in telecom MSP intrusion
Unit 42 detailed a multi-stage intrusion in September 2024 against a telecommunications managed service provider, tracked as CL-STA-0954 (aka UNC5820). The attackers gained initial access by exploiting CVE-2024-47575 (FortiJump) on a central FortiManager and exfiltrated an archive with running configurations, credentials and private keys …