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diff --git a/scripts/mikrotik-routeros-brute.nse b/scripts/mikrotik-routeros-brute.nse
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+description = [[
+Performs brute force password auditing against Mikrotik RouterOS devices with the API RouterOS interface enabled.
+
+Additional information:
+* http://wiki.mikrotik.com/wiki/API
+]]
+
+---
+-- @usage
+-- nmap -p8728 --script mikrotik-routeros-brute <target>
+--
+-- @output
+-- PORT     STATE SERVICE REASON
+-- 8728/tcp open  unknown syn-ack
+-- | mikrotik-routeros-brute:
+-- |   Accounts
+-- |     admin:dOsmyvsvJGA967eanX - Valid credentials
+-- |   Statistics
+-- |_    Performed 60 guesses in 602 seconds, average tps: 0
+--
+-- @args mikrotik-routeros-brute.threads sets the number of threads. Default: 1
+--
+---
+
+author = "Paulino Calderon <calderon()websec.mx>"
+license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
+categories = {"intrusive", "brute"}
+
+local shortport = require "shortport"
+local brute = require "brute"
+local creds = require "creds"
+local nmap = require "nmap"
+local stdnse = require "stdnse"
+local string = require "string"
+local openssl = stdnse.silent_require "openssl"
+
+portrule = shortport.portnumber(8728, "tcp")
+
+Driver =
+{
+  new = function(self, host, port, options )
+  local o = { host = host, port = port, options = options }
+  setmetatable(o, self)
+  self.__index = self
+    o.emptypass = true
+    return o
+  end,
+
+  connect = function( self )
+    self.s = brute.new_socket()
+    self.s:set_timeout(self.options['timeout'])
+    return self.s:connect(self.host, self.port, "tcp")
+  end,
+
+  login = function( self, username, password )
+   local status, data, try
+    data = string.pack("s1x", "/login")
+
+    --Connect to service and obtain the challenge response
+    try = nmap.new_try(function() return false end)
+    try(self.s:send(data))
+    data = try(self.s:receive_bytes(50))
+    stdnse.debug1("Response #1:%s", data)
+    local _, _, ret = string.find(data, '!done%%=ret=(.+)')
+
+    --If we find the challenge value we continue the connection process
+    if ret then
+        stdnse.debug1("Challenge value found:%s", ret)
+        local md5str = "\0" .. password .. stdnse.fromhex(ret) --appends pwd and challenge
+        local chksum = stdnse.tohex(openssl.md5(md5str))
+        local login_pkt = string.pack("s1s1s1x", "/login", "=name="..username, "=response=00"..chksum)
+        try(self.s:send(login_pkt))
+        data = try(self.s:receive_bytes(50))
+        stdnse.debug1("Response #2:%s", data)
+        if data then
+          if string.find(data, "message=cannot") == nil then
+            local c = creds.Credentials:new(SCRIPT_NAME, self.host, self.port )
+            c:add(username, password, creds.State.VALID )
+          end
+        end
+    end
+    return false, brute.Error:new( "Incorrect password" )
+  end,
+
+  disconnect = function( self )
+    return self.s:close()
+  end
+}
+
+action = function(host, port)
+  local thread_num = tonumber(stdnse.get_script_args(SCRIPT_NAME..".threads")) or 1
+  local options = {timeout = 5000}
+  local bengine = brute.Engine:new(Driver, host, port, options)
+
+  bengine:setMaxThreads(thread_num)
+  bengine.options.script_name = SCRIPT_NAME
+  local _, result = bengine:start()
+  return result
+end