local http = require "http" local nmap = require "nmap" local shortport = require "shortport" local stdnse = require "stdnse" local string = require "string" local table = require "table" description = [[ Looks for signature of known server compromises. Currently, the only signature it looks for is the one discussed here: http://blog.unmaskparasites.com/2009/09/11/dynamic-dns-and-botnet-of-zombie-web-servers/. This is done by requesting the page /ts/in.cgi?open2 and looking for an errant 302 (it attempts to detect servers that always return 302). Thanks to Denis from the above link for finding this technique! ]] --- --@output -- Interesting ports on www.sopharma.bg (84.242.167.49): -- PORT STATE SERVICE REASON -- 80/tcp open http syn-ack -- |_ http-malware-host: Host appears to be clean -- 8080/tcp open http-proxy syn-ack -- | http-malware-host: -- | Host appears to be infected (/ts/in.cgi?open2 redirects to http://last-another-life.ru:8080/index.php) -- |_ See: http://blog.unmaskparasites.com/2009/09/11/dynamic-dns-and-botnet-of-zombie-web-servers/ -- author = "Ron Bowes" license = "Same as Nmap--See https://nmap.org/book/man-legal.html" categories = {"malware", "safe"} portrule = shortport.http action = function(host, port) -- Check what response we get for a 404 local result, result_404, known_404 = http.identify_404(host, port) if(result == false) then return stdnse.format_output(false, "Couldn't identify 404 message: " .. result_404) end -- If the 404 result is a 302, we're going to have trouble if(result_404 == 302) then return stdnse.format_output(false, "Unknown pages return a 302 response; unable to check") end -- Identify servers that answer 200 to invalid HTTP requests and exit as these would invalidate the test if ( result_404 == 200 ) then stdnse.debug1("Exiting due to ambiguous response from web server on %s:%s. All URIs return status 200.", host.ip, port.number) return false end -- Perform a GET request on the file result = http.get_url("http://" .. host.ip .. ":" .. port.number .. "/ts/in.cgi?open2") if(not(result)) then return stdnse.format_output(false, "Couldn't perform GET request") end if(result.status == 302) then local response = {} if(result.header.location) then table.insert(response, string.format("Host appears to be infected (/ts/in.cgi?open2 redirects to %s)", result.header.location)) else table.insert(response, "Host appears to be infected (/ts/in.cgi?open2 return a redirect") end table.insert(response, "See: http://blog.unmaskparasites.com/2009/09/11/dynamic-dns-and-botnet-of-zombie-web-servers/") return stdnse.format_output(true, response) end -- Not infected if(nmap.verbosity() > 0) then return "Host appears to be clean" else return nil end end