Threat Group Cards: A Threat Actor Encyclopedia Archived: 2026-04-05 23:47:59 UTC Home > List all groups > List all tools > List all groups using tool TTCalc Tool: TTCalc Names TTCalc Category Malware Type Backdoor Description (FireEye) A weaponized version of the open-source TTCalc application (a mathematical big number calculator) Information Last change to this tool card: 20 April 2020 Download this tool card in JSON format All groups using tool TTCalc Changed Name Country Observed APT groups   APT 3, Gothic Panda, Buckeye 2007-Nov 2017 1 group listed (1 APT, 0 other, 0 unknown) Source: https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=55c3e204-9f6d-4f1c-8532-2e1d2f485ce5 https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=55c3e204-9f6d-4f1c-8532-2e1d2f485ce5 Page 1 of 1