1 files changed, 81 insertions, 0 deletions
diff --git a/scripts/http-malware-host.nse b/scripts/http-malware-host.nse
new file mode 100644
index 0000000..f578b4a
--- /dev/null
+++ b/scripts/http-malware-host.nse
@@ -0,0 +1,81 @@
+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 <code>/ts/in.cgi?open2</code> 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(host, port, "/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