mirror of
https://github.com/AbdullahRizwan101/CTF-Writeups
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87 lines
4.5 KiB
Markdown
87 lines
4.5 KiB
Markdown
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# HackMyVM-Dominator
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## NMAP
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```
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Nmap scan report for 192.168.1.6
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Host is up (0.00022s latency).
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Not shown: 998 closed ports
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PORT STATE SERVICE VERSION
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53/tcp open domain (unknown banner: not currently available) | dns-nsid:
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|_ bind.version: not currently available
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| fingerprint-strings:
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| DNSVersionBindReqTCP:
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| version
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| bind
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|_ currently available
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80/tcp open http Apache httpd 2.4.38 ((Debian))
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|_http-server-header: Apache/2.4.38 (Debian)
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|_http-title: Apache2 Debian Default Page: It works
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65222/tcp open ssh OpenSSH 7.9p1 Debian 10+deb10u2 (protocol 2.0)
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| ssh-hostkey:
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| 2048 f7:ea:48:1a:a3:46:0b:bd:ac:47:73:e8:78:25:af:42 (RSA)
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| 256 2e:41:ca:86:1c:73:ca:de:ed:b8:74:af:d2:06:5c:68 (ECDSA)
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|_ 256 33:6e:a2:58:1c:5e:37:e1:98:8c:44:b1:1c:36:6d:75 (ED25519)
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1 service unrecognized despite returning data. If you know the service/version, please submit the following fingerprint at https://nmap.org/cgi-bin/
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submit.cgi?new-service :
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SF-Port53-TCP:V=7.80%I=7%D=1/11%Time=5FFC4A4A%P=x86_64-pc-linux-gnu%r(DNSV
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SF:ersionBindReqTCP,52,"\0P\0\x06\x85\0\0\x01\0\x01\0\x01\0\0\x07version\x
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SF:04bind\0\0\x10\0\x03\xc0\x0c\0\x10\0\x03\0\0\0\0\0\x18\x17not\x20curren
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SF:tly\x20available\xc0\x0c\0\x02\0\x03\0\0\0\0\0\x02\xc0\x0c");
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MAC Address: 08:00:27:0D:8F:62 (Oracle VirtualBox virtual NIC)
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Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
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Nmap done: 1 IP address (1 host up) scanned in 25.75 seconds
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```
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## PORT 80
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<img src="https://imgur.com/Ig54o0Y.png"/>
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Fuzzing for directories didn't returned interesting for us other than robots.txt
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<img src="https://imgur.com/aNc01hr.png"/>
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Looking for `robots.txt` we find a domain name so there is a port 53 open we can check for zone transfer by that.
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<img src="https://imgur.com/iocFe86.png"/>
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## DNS Zone Transfer
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<img src="https://imgur.com/afAK5hc.png"/>
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Through TXT records we find a directory named `/fhcrefrperg`.But this wasn't a directory it was encrypted using a cipher so headed to cyberchef and check if it was ROT13 which was correct.
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<img src="https://imgur.com/hwz7bWs.png"/>
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<img src="https://imgur.com/bTj3ajI.png"/>
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<img src="https://imgur.com/dThh6HT.png"/>
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But this key was protected with a passphrase.
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<img src="https://imgur.com/eUWzSn3.png"/>
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Using ssh2john we got the hash for the `id_rsa` key now let's crack it with johntheripper
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<img src="https://imgur.com/Dnb9aw3.png"/>
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<img src="https://imgur.com/M4sWBCP.png"/>
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And boom we are in !!!
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## Privilege Escalation
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Look for any SUID on the machine
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<img src="https://imgur.com/qDEcp1k.png"/>
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I found a article regarding exploiting systemctl service which has a SUID or can be run as sudo
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https://medium.com/@klockw3rk/privilege-escalation-leveraging-misconfigured-systemctl-permissions-bc62b0b28d49
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Now we can exploit `systemctl` by making a service and ruuning it with systemctl
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<img src="https://imgur.com/d0XzIwr.png"/>
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<img src="https://imgur.com/Q6nizZ6.png"/>
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