Threat Group Cards: A Threat Actor Encyclopedia Archived: 2026-04-05 14:03:51 UTC Home > List all groups > List all tools > List all groups using tool Neptun Tool: Neptun Names Neptun Category Malware Type Backdoor, Info stealer, Downloader, Exfiltration Description (Symantec) Neptun is installed on Microsoft Exchange servers and is designed to passively listen for commands from the attackers. This passive listening capability makes the malware more difficult to detect. Neptun is also able to download additional tools, upload stolen files, and execute shell commands. Information Last change to this tool card: 20 April 2020 Download this tool card in JSON format All groups using tool Neptun Changed Name Country Observed APT groups   Turla, Waterbug, Venomous Bear 1996-2024   1 group listed (1 APT, 0 other, 0 unknown) Source: https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=b74d2b0a-2ec8-48c5-b55c-1e82f8971c56 https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=b74d2b0a-2ec8-48c5-b55c-1e82f8971c56 Page 1 of 1