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Port 87 Details


known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
87 tcp terminal link terminal link - a talk/chat style protocol. Port commonly used by intruders

Backdoor.Win32.Agent.ad / Insecure Credential Storage - the malware listens on TCP port 87, its default password "hoanggia" is stored in the Windows registry in cleartext under "clrprv.oo" in "HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\System\NPP". The password is also set as cookie value "Cookie: pass=hoanggia; day=14; month=11; year=2021", which also gets sent over the network in plaintext. Third party attackers who can access the system or sniff traffic can grab the password, then execute any programs and or run commands made available by the backdoor.
References: [MVID-2021-0406]
SG
87 tcp priv-term-l any private terminal link ttylink SANS
87 tcp priv-term-l any private terminal link, ttylink Nmap
87 tcp,udp any private terminal link IANA
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