1 files changed, 131 insertions, 0 deletions
diff --git a/scripts/http-ntlm-info.nse b/scripts/http-ntlm-info.nse
new file mode 100644
index 0000000..0147910
--- /dev/null
+++ b/scripts/http-ntlm-info.nse
@@ -0,0 +1,131 @@
+local os = require "os"
+local datetime = require "datetime"
+local http = require "http"
+local shortport = require "shortport"
+local stdnse = require "stdnse"
+local base64 = require "base64"
+local smbauth = require "smbauth"
+local string = require "string"
+
+
+description = [[
+This script enumerates information from remote HTTP services with NTLM
+authentication enabled.
+
+By sending a HTTP NTLM authentication request with null domain and user
+credentials (passed in the 'Authorization' header), the remote service will
+respond with a NTLMSSP message (encoded within the 'WWW-Authenticate' header)
+and disclose information to include NetBIOS, DNS, and OS build version if
+available.
+]]
+
+
+---
+-- @usage
+-- nmap -p 80 --script http-ntlm-info --script-args http-ntlm-info.root=/root/ <target>
+--
+-- @args http-ntlm-info.root The URI path to request
+--
+-- @output
+-- 80/tcp   open     http
+-- | http-ntlm-info:
+-- |   Target_Name: ACTIVEWEB
+-- |   NetBIOS_Domain_Name: ACTIVEWEB
+-- |   NetBIOS_Computer_Name: WEB-TEST2
+-- |   DNS_Domain_Name: somedomain.com
+-- |   DNS_Computer_Name: web-test2.somedomain.com
+-- |   DNS_Tree_Name: somedomain.com
+-- |_  Product_Version: 6.1.7601
+--
+--@xmloutput
+-- <elem key="Target_Name">TELME</elem>
+-- <elem key="NetBIOS_Domain_Name">TELME</elem>
+-- <elem key="NetBIOS_Computer_Name">GT4</elem>
+-- <elem key="DNS_Domain_Name">telme.somedomain.com</elem>
+-- <elem key="DNS_Computer_Name">gt4.telme.somedomain.com</elem>
+-- <elem key="Product_Version">5.0.2195</elem>
+
+
+author = "Justin Cacak"
+license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
+categories = {"default", "discovery", "safe"}
+
+
+portrule = shortport.http
+
+local auth_blob = base64.enc( select( 2,
+  smbauth.get_security_blob(nil, nil, nil, nil, nil, nil, nil,
+    0x00000001 + -- Negotiate Unicode
+    0x00000002 + -- Negotiate OEM strings
+    0x00000004 + -- Request Target
+    0x00000200 + -- Negotiate NTLM
+    0x00008000 + -- Negotiate Always Sign
+    0x00080000 + -- Negotiate NTLM2 Key
+    0x20000000 + -- Negotiate 128
+    0x80000000 -- Negotiate 56
+    ))
+  )
+
+action = function(host, port)
+
+  local output = stdnse.output_table()
+  local root = stdnse.get_script_args(SCRIPT_NAME .. ".root") or "/"
+
+  -- Inject NTLM authorization header with null domain and user credentials
+  local opts = { header = { Authorization = "NTLM " .. auth_blob } }
+
+  local response = http.get( host, port, root, opts )
+  local recvtime = os.time()
+
+  -- Continue only if correct header (www-authenticate) and NTLM response are included
+  if response.header["www-authenticate"] and string.match(response.header["www-authenticate"], "NTLM ([a-zA-Z0-9///+=]*)") then
+
+    -- Extract NTLMSSP response and base64 decode
+    local data = base64.dec(string.match(response.header["www-authenticate"], "NTLM ([a-zA-Z0-9///+=]*)"))
+
+    -- Leverage smbauth.get_host_info_from_security_blob() for decoding
+    local ntlm_decoded = smbauth.get_host_info_from_security_blob(data)
+
+    if ntlm_decoded.timestamp then
+      -- 64-bit number of 100ns clicks since 1/1/1601
+      local unixstamp = ntlm_decoded.timestamp // 10000000 - 11644473600
+      datetime.record_skew(host, unixstamp, recvtime)
+    end
+
+    -- Target Name will always be returned under any implementation
+    output.Target_Name = ntlm_decoded.target_realm
+
+    -- Only display information returned (varies especially with open source implementations)
+    -- Additionally ignore responses with null values (very rare)
+    if ntlm_decoded.netbios_domain_name and #ntlm_decoded.netbios_domain_name > 0 then
+      output.NetBIOS_Domain_Name = ntlm_decoded.netbios_domain_name
+    end
+
+    if ntlm_decoded.netbios_computer_name and #ntlm_decoded.netbios_computer_name > 0 then
+      output.NetBIOS_Computer_Name = ntlm_decoded.netbios_computer_name
+    end
+
+    if ntlm_decoded.dns_domain_name and #ntlm_decoded.dns_domain_name > 0 then
+      output.DNS_Domain_Name = ntlm_decoded.dns_domain_name
+    end
+
+    if ntlm_decoded.fqdn and #ntlm_decoded.fqdn > 0 then
+      output.DNS_Computer_Name = ntlm_decoded.fqdn
+    end
+
+    if ntlm_decoded.dns_forest_name and #ntlm_decoded.dns_forest_name > 0 then
+      output.DNS_Tree_Name = ntlm_decoded.dns_forest_name
+    end
+
+    if ntlm_decoded.os_major_version then
+      output.Product_Version = ("%d.%d.%d"):format(
+        ntlm_decoded.os_major_version,
+        ntlm_decoded.os_minor_version,
+        ntlm_decoded.os_build)
+    end
+
+    return output
+
+  end
+
+end