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Cloaked and Covert: Uncovering UNC3886 Espionage Operations

ID: 14a6406b-e3d3-5279-9338-9d89793b5539

STIX ID: report--14a6406b-e3d3-5279-9338-9d89793b5539

Feed Name: Google Cloud Threat Intelligence

Threat Score
88/100

Date Published: 2024-06-18

Date Updated: 2026-04-27

Author: Mandiant

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**Executive summary:** The report documents UNC3886 activity in which operators deployed MOPSLED and RIFLESPINE backdoors (using ChaCha20 and AES) and leveraged trusted third-party services (GitHub, Google Drive) as covert C2 channels, while also deploying rootkits and backdoored SSH binaries on VMware ESXi/vCenter guest VMs to harvest credentials and enable lateral movement.

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