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https://github.com/AbdullahRizwan101/CTF-Writeups
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135 lines
4.7 KiB
Markdown
135 lines
4.7 KiB
Markdown
# TryHackMe-Relevant
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## NMAP
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```
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Nmap scan report for 10.10.179.43
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Host is up (0.15s latency).
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Not shown: 995 filtered ports
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PORT STATE SERVICE VERSION
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80/tcp open http Microsoft IIS httpd 10.0
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| http-methods:
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|_ Potentially risky methods: TRACE
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|_http-server-header: Microsoft-IIS/10.0
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|_http-title: IIS Windows Server
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135/tcp open msrpc Microsoft Windows RPC
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139/tcp open netbios-ssn Microsoft Windows netbios-ssn
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445/tcp open microsoft-ds Windows Server 2016 Standard Evaluation 14393 microsoft-ds
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3389/tcp open ms-wbt-server Microsoft Terminal Services
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| rdp-ntlm-info:
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| Target_Name: RELEVANT
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| NetBIOS_Domain_Name: RELEVANT
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| NetBIOS_Computer_Name: RELEVANT
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| DNS_Domain_Name: Relevant
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| DNS_Computer_Name: Relevant
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| Product_Version: 10.0.14393
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|_ System_Time: 2020-11-12T01:17:03+00:00
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| ssl-cert: Subject: commonName=Relevant
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| Not valid before: 2020-07-24T23:16:08
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|_Not valid after: 2021-01-23T23:16:08
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|_ssl-date: 2020-11-12T01:17:42+00:00; 0s from scanner time.
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Service Info: OSs: Windows, Windows Server 2008 R2 - 2012; CPE: cpe:/o:microsoft:windows
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49663/tcp open http Microsoft IIS httpd 10.0
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| http-methods:
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|_ Potentially risky methods: TRACE
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|_http-server-header: Microsoft-IIS/10.0
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|_http-title: IIS Windows Server
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49667/tcp open msrpc Microsoft Windows RPC
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49668/tcp open msrpc Microsoft Windows RPC
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Service Info: OSs: Windows, Windows Server 2008 R2 - 2012; CPE: cpe:/o:microsoft:windows
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```
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## PORT 80
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<img src="https://imgur.com/O0DByH0.png"/>
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## PORT 139/445 (SMB)
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```
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root@kali:~/TryHackMe/Medium/Relevant# smbclient -L \\\\10.10.179.43\\
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Enter WORKGROUP\root's password:
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Sharename Type Comment
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--------- ---- -------
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ADMIN$ Disk Remote Admin
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C$ Disk Default share
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IPC$ IPC Remote IPC
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nt4wrksv Disk
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SMB1 disabled -- no workgroup available
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root@kali:~/TryHackMe/Medium/Relevant# smbclient \\\\10.10.179.43\\nt4wrksv
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Enter WORKGROUP\root's password:
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Try "help" to get a list of possible commands.
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smb: \> ls -al
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NT_STATUS_NO_SUCH_FILE listing \-al
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smb: \> dir
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. D 0 Sun Jul 26 02:46:04 2020
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.. D 0 Sun Jul 26 02:46:04 2020
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passwords.txt A 98 Sat Jul 25 20:15:33 2020
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7735807 blocks of size 4096. 4937572 blocks available
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smb: \> get passwords.txt
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getting file \passwords.txt of size 98 as passwords.txt (0.1 KiloBytes/sec) (average 0.1 KiloBytes/sec)
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smb: \>
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```
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We saved the text file on our local machine
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```
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[User Passwords - Encoded]
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Qm9iIC0gIVBAJCRXMHJEITEyMw==
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QmlsbCAtIEp1dzRubmFNNG40MjA2OTY5NjkhJCQk
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```
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Then these look like base64 so we decoded them through cyberchef and found some credentials
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```
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Bob - !P@$$W0rD!123
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Bill - Juw4nnaM4n420696969!$$$
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```
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Let's try if they are credentials for smbshares
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<img src="https://imgur.com/cGgbG2E.png"/>
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Through these users we can read `IPC$` share but I failed to do anything on it
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## PORT 49663
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Now this may seem similar to PORT 80 but it's not here that `nt4wrksv` share is linked which means that it's writable too and we can upload a reverse shell on it.
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<img src="https://imgur.com/LBrpl2K.png"/>
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<img src="https://imgur.com/bcNoJG4.png"/>
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We can put a `aspx` payload in that share
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<img src="https://imgur.com/c17U68t.png"/>
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<img src="https://imgur.com/zLbRGnt.png"/>
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<img src="https://imgur.com/01bddII.png"/>
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<img src="https://imgur.com/j3urQ8B.png"/>
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Running `getprivs` will tell how we can escalate our privileges.
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<img src="https://imgur.com/w8cfUN4.png"/>
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Here `SeImpersonatePrivilege` is enabled so any process holding this privilege can impersonate(but not create) any token for which it is able to gethandle. You can get a privileged tokenfrom a Windows service making it perform an NTLM authentication against the exploit, then execute a process as SYSTEM.
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<img src="https://imgur.com/asYKYl4.png"/>
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<img src="https://imgur.com/Jc8IRBp.png"/>
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<img src="https://imgur.com/9vRSSIj.png"/>
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But still we are not `NT\AUTHORITY `
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<img src="https://imgur.com/1gRH1QI.png"/>
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Download print spoofer.exe (64 bit version)
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<img src="https://imgur.com/dd7Es1p.png"/>
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Upload where we have write permissions
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<img src="https://imgur.com/YkfDkWG.png"/>
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<img src="https://imgur.com/eMYz83r.png"/>
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