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94 lines
3.9 KiB
Markdown
94 lines
3.9 KiB
Markdown
# HackTheBox-Granny
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## NMAP
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```bash
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PORT STATE SERVICE REASON VERSION
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80/tcp open http syn-ack ttl 127 Microsoft IIS httpd 6.0
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| http-methods:
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| Supported Methods: OPTIONS TRACE GET HEAD DELETE COPY MOVE PROPFIND PROPPATCH SEARCH MKCOL LOCK UNLOCK PUT POST
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|_ Potentially risky methods: TRACE DELETE COPY MOVE PROPFIND PROPPATCH SEARCH MKCOL LOCK UNLOCK PUT
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| http-ntlm-info:
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| Target_Name: GRANNY
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| NetBIOS_Domain_Name: GRANNY
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| NetBIOS_Computer_Name: GRANNY
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| DNS_Domain_Name: granny
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| DNS_Computer_Name: granny
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|_ Product_Version: 5.2.3790
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|_http-server-header: Microsoft-IIS/6.0
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| http-webdav-scan:
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| Public Options: OPTIONS, TRACE, GET, HEAD, DELETE, PUT, POST, COPY, MOVE, MKCOL, PROPFIND, PROPPATCH, LOCK, UNLOCK, SEARCH
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| Allowed Methods: OPTIONS, TRACE, GET, HEAD, DELETE, COPY, MOVE, PROPFIND, PROPPATCH, SEARCH, MKCOL, LOCK, UNLOCK
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| Server Type: Microsoft-IIS/6.0
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| WebDAV type: Unknown
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|_ Server Date: Wed, 26 May 2021 15:53:30 GMT
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```
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## PORT 80 (HTTP)
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<img src="https://imgur.com/a2c68mM.png"/>
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As seen from the nmap scan , this web server is using IIS 6.0 version which might havev some vulnerabilites since it's old
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## Using Metasploit
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On googling around exploits for IIS 6.0 I found a metasploit module
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<img src="https://imgur.com/TrmXjnl.png"/>
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So use the metasploit module and configure the options
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<img src="https://imgur.com/yPowb83.png"/>
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<img src="https://imgur.com/UncUyLv.png"/>
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Right now we are not a privileged user so we need to find a way to escalate our privileges so let's run `whoami /all`
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<img src="https://i.imgur.com/Jtcm9HL.png"/>
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We can see Seimpersonate privleges is on , what Seimperonsate is that a local admin can impersonate himself to a logged user but here a service account has these privileges so we can abuse these to create a token which will enable us switch user to admin
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<img src="https://i.imgur.com/6Zd9geT.png"/>
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Since this is a windows server 2003 operating system we are going to search for abusing the privileges for this particular system
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<img src="https://imgur.com/lOdyVqP.png"/>
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We can see the file `churrasco` which we can use to abuse impersonate privileges
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<img src="https://imgur.com/XfgRuhF.png"/>
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Now to upload this on the target machine I had some problems while doing it as powershell was not available so we cannot use it's functionality to download files also `curl` wasn't available too , `certutil` was also giving problems
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<img src="https://i.imgur.com/eIItkUJ.png"/>
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I then just used functionality of meterpreter to upload files and it worked like a charm
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<img src="https://i.imgur.com/q1793f6.png"/>
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But I forogt to allow downloading malicious files as firefox gave a warningthat's why showing it's empty so let's download it again
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https://github.com/Re4son/Churrasco/raw/master/churrasco.exe
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To run commands through this exe `churrasco.exe -d` after that the command we want to run as SYSTEM
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<img src="https://i.imgur.com/H7CXxgB.png"/>
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<img src="https://imgur.com/r0XG0LZ.png"/>
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I get a connection back didn't get a shell
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<img src="https://imgur.com/h6Ng31S.png"/>
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And I soon reliazed my mistake that I didn't provide `-e` argument to invoke `cmd.exe` on getting a connection,so let's run it again
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<img src="https://i.imgur.com/LBDzywu.png"/>
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<img src="https://i.imgur.com/LBDzywu.png"/>
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And now we got a shell as SYSTEM
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