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41 lines
793 B
Lua
41 lines
793 B
Lua
description = [[
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Checks if SMTP is running on a non-standard port.
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This may indicate that crackers or script kiddies have set up a backdoor on the
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system to send spam or control the machine.
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]]
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---
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-- @output
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-- 22/tcp open smtp
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-- |_ smtp-strangeport: Mail server on unusual port: possible malware
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author = "Diman Todorov <diman.todorov@gmail.com>"
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license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
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categories = {"malware"}
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portrule = function(host, port)
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if
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( port.number ~= 25
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and
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port.number ~= 465
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and
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port.number ~= 587
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and
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port.service == "smtp" )
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and port.protocol == "tcp"
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and port.state == "open"
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then
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return true
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else
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return false
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end
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end
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action = function()
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return "Mail server on unusual port: possible malware"
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end
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