Threat Group Cards: A Threat Actor Encyclopedia Archived: 2026-04-05 14:08:25 UTC Home > List all groups > List all tools > List all groups using tool Sublist3r Tool: Sublist3r Names Sublist3r Category Tools Type Reconnaissance Description a tool written in Python designed to enumerate website subdomains. The tool uses open-source intelligence (OSINT). Sublist3r supports many different search engines, such as Google, Yahoo, Bing, Baidu and Ask, as well as such services as Netcraft, Virustotal, ThreatCrowd, DNSdumpster and ReverseDNS. The tool helps penetration testers to collect information on the subdomains of the domain they are researching. Information Last change to this tool card: 20 April 2020 Download this tool card in JSON format All groups using tool Sublist3r Changed Name Country Observed APT groups   Energetic Bear, Dragonfly 2010-Mar 2022 1 group listed (1 APT, 0 other, 0 unknown) Source: https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=61334ce0-c9dc-4201-966f-e489baa5a337 https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=61334ce0-c9dc-4201-966f-e489baa5a337 Page 1 of 1