Threat Group Cards: A Threat Actor Encyclopedia Archived: 2026-04-05 18:59:24 UTC Home > List all groups > List all tools > List all groups using tool BISCUIT Tool: BISCUIT Names BISCUIT zxdosml Category Malware Type Backdoor Description (FireEye) The BISCUIT backdoor (so named for the command “bdkzt”) is an illustrative example of the range of commands that APT1 has built into its “standard” backdoors. APT1 has used and steadily modified BISCUIT since as early as 2007 and continues to use it presently. Information MITRE ATT&CK Malpedia Last change to this tool card: 23 April 2020 Download this tool card in JSON format All groups using tool BISCUIT Changed Name Country Observed APT groups Comment Crew, APT 1 2006-May 2018 1 group listed (1 APT, 0 other, 0 unknown) Source: https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=f781f7b0-9b85-4954-a751-a435ec753c9f https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=f781f7b0-9b85-4954-a751-a435ec753c9f Page 1 of 1