Threat Group Cards: A Threat Actor Encyclopedia Archived: 2026-04-05 22:26:22 UTC Home > List all groups > List all tools > List all groups using tool Stunnel Tool: Stunnel Names Stunnel Category Tools Type Tunneling Description Stunnel is a proxy designed to add TLS encryption functionality to existing clients and servers without any changes in the programs' code. Its architecture is optimized for security, portability, and scalability (including load-balancing), making it suitable for large deployments. Information Last change to this tool card: 20 April 2021 Download this tool card in JSON format All groups using tool Stunnel Changed Name Country Observed APT groups Lazarus Group, Hidden Cobra, Labyrinth Chollima 2007-May 2025 1 group listed (1 APT, 0 other, 0 unknown) Source: https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=3dad9d10-10e0-4368-a411-a56a4350e132 https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=3dad9d10-10e0-4368-a411-a56a4350e132 Page 1 of 1