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