Threat Group Cards: A Threat Actor Encyclopedia
Archived: 2026-04-05 19:38:49 UTC
Home > List all groups > List all tools > List all groups using tool Responder
 Tool: Responder
Names
Responder
SpiderLabs Responder
Category Tools
Type Poisoning
Description
Responder is an open source tool used for LLMNR, NBT-NS and MDNS poisoning,
with built-in HTTP/SMB/MSSQL/FTP/LDAP rogue authentication server supporting
NTLMv1/NTLMv2/LMv2, Extended Security NTLMSSP and Basic HTTP
authentication.
Information MITRE ATT&CK Malpedia Last change to this tool card: 28 December 2022
Download this tool card in JSON format
All groups using tool Responder
Changed Name Country Observed
APT groups
 Sofacy, APT 28, Fancy Bear, Sednit 2004-Apr 2025
1 group listed (1 APT, 0 other, 0 unknown)
Source: https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=c1c43f6e-c49e-464e-90c4-1eb0d1d36c14
https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=c1c43f6e-c49e-464e-90c4-1eb0d1d36c14
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