Threat Group Cards: A Threat Actor Encyclopedia Archived: 2026-04-05 13:18:01 UTC Home > List all groups > List all tools > List all groups using tool Ruler Tool: Ruler Names Ruler Category Tools Type Info stealer, Credential stealer Description Ruler is a tool to abuse Microsoft Exchange services. It is publicly available on GitHub and the tool is executed via the command line. The creators of Ruler have also released a defensive tool, NotRuler, to detect its usage. Information MITRE ATT&CK Last change to this tool card: 22 April 2020 Download this tool card in JSON format All groups using tool Ruler Changed Name Country Observed APT groups APT 33, Elfin, Magnallium 2013-Apr 2024 1 group listed (1 APT, 0 other, 0 unknown) Source: https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=4c90bc7c-0dad-4d8f-b72a-424eb6b852e5 https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=4c90bc7c-0dad-4d8f-b72a-424eb6b852e5 Page 1 of 1