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HackTheBox/Notebook.md
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HackTheBox/Notebook.md
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# HackTheBox-Notebook
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## Rustscan
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```
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rustscan -a 10.129.84.245 -- -A -sC -sV
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.----. .-. .-. .----..---. .----. .---. .--. .-. .-.
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| {} }| { } |{ {__ {_ _}{ {__ / ___} / {} \ | `| |
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| .-. \| {_} |.-._} } | | .-._} }\ }/ /\ \| |\ |
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`-' `-'`-----'`----' `-' `----' `---' `-' `-'`-' `-'
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The Modern Day Port Scanner.
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________________________________________
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: https://discord.gg/GFrQsGy :
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: https://github.com/RustScan/RustScan :
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--------------------------------------
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Real hackers hack time ⌛
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[~] The config file is expected to be at "/root/.rustscan.toml"
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[!] File limit is lower than default batch size. Consider upping with --ulimit. May cause harm to sensitive servers
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[!] Your file limit is very small, which negatively impacts RustScan's speed. Use the Docker image, or up the Ulimit with '--ulimit 5000'.
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Open 10.129.84.245:22
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Open 10.129.84.245:80
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PORT STATE SERVICE REASON VERSION
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22/tcp open ssh syn-ack ttl 63 OpenSSH 7.6p1 Ubuntu 4ubuntu0.3 (Ubuntu Linux; protocol 2.0)
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| ssh-hostkey:
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| 2048 86:df:10:fd:27:a3:fb:d8:36:a7:ed:90:95:33:f5:bf (RSA)
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| ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCZwjrB05nGUvacI81YxNqy+6WpPHhIju6c73aoiru9nW/aVhTmOEsSOGoChEXeQeDN67ZN5QW4LFf0tXeQeJqvgO82HtFkUOiN8tt1RpI98S
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V+hx8scCzpmtAyu1OJSUM3/cL2tEPTcPHAgHTmroWiXxIMPhTFLIoDVBIqmBrORUIwgjIzFUbEDQJXKPkFciofbowVOkHnT+lv5XokU6571wrX/LRJvTNBEAvbbz0HAfvUkne8ycQsW08qk/Bugi
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LnJHLg24YryGdHl5RqqW/42fsUADngFLncy2+/XCo8Pe/erO+7Zw6r4n1qVb0W0BZ+lRflcRss3diM/21R6O0z
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| 256 e7:81:d6:6c:df:ce:b7:30:03:91:5c:b5:13:42:06:44 (ECDSA)
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| ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBLeuBF/ZBUM0ZBYW4+vgQMhIPWVs2fzv9lmQHoflWFNMP/sFWZDeVneJE0CRSLnYi2y/wwc079
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bIsQRibay3Fpg=
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| 256 c6:06:34:c7:fc:00:c4:62:06:c2:36:0e:ee:5e:bf:6b (ED25519)
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|_ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDg0mzA1xTe9hivlJN4s+7eXaiyIYefpyykHIir3btEA
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80/tcp open http syn-ack ttl 63 nginx 1.14.0 (Ubuntu)
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|_http-favicon: Unknown favicon MD5: B2F904D3046B07D05F90FB6131602ED2
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| http-methods:
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|_ Supported Methods: GET HEAD OPTIONS
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|_http-server-header: nginx/1.14.0 (Ubuntu)
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|_http-title: The Notebook - Your Note Keeper
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```
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## PORT 80 (HTTP)
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<img src="https://imgur.com/I1NTuJ9.png"/>
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I went to `login` page and tried basic sqli
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<img src="https://imgur.com/13lJcWB.png"/>
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Tried `admin:admin`
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<img src="https://imgur.com/Sbiq56t.png"/>
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And got this error so we know that `admin` user exists
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Then I decide to register an account
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<img src="https://imgur.com/AV6CmzR.png"/>
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After registering an account I tried to to do some stuff with HTML but saw couldn't do anything
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<img src="https://imgur.com/RxzOtTN.png"/>
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On running `dirsearch` I didn't found anything
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<img src="https://imgur.com/4F0JUo9.png"/>
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So I decided to intercept the request with `burp suite` and found a base64 encoded cookie
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<img src="https://imgur.com/gvj5ucv.png"/>
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Which I then took it to cyberchef
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<img src="https://imgur.com/Rkh6ioF.png"/>
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Alternatively it is best to vist https://jwt.io
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<img src="https://imgur.com/F32iQD4.png"/>
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Now we want to create our own key and host it on port 7070
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https://gist.github.com/ygotthilf/baa58da5c3dd1f69fae9
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<img src="https://imgur.com/aT8aKAw.png"/>
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<img src="https://imgur.com/07yxVZs.png"/>
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Notice we have two keys public and private we want the public to be hosted and rename it to `privKey.key`
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<img src="https://imgur.com/lo1SuSz.png"/>
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<img src="https://imgur.com/brwDQcH.png"/>
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<img src="https://imgur.com/v4174MW.png"/>
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Notice we have added `admin_cap =true` and changed the `kid` to our machine
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now copy the whole encoded text and replace it with the cookie
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Notice we will see `admin panel`
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<img src="https://imgur.com/jEMn97H.png"/>
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I decide to upload `phpbash.php` which give us a nice sessions on the web browser
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<img src="https://imgur.com/LaABinj.png"/>
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<img src="https://imgur.com/s51NR88.png"/>
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Running linpeas we can see that there's docker installed on the box
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<img src="https://imgur.com/INmrnLf.png"/>
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We can also see IPTABLES have docker rules configured
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<img src="https://imgur.com/ONRy7HK.png"/>
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I tried connecting to docker with `docker -H 127.0.0.1:10101`, `127.0.0.1:8080` but was doing it wrong maybe
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Going back to the website as admin I saw some notes which I was able to view
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<img src="https://imgur.com/HHp1bqz.png"/>
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Here Noah says that he has some files in `backups`
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<img src="https://imgur.com/TuIoUeu.png"/>
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<img src="https://imgur.com/AHcZI4r.png"/>
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We can see `home.tar.gz`
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I started a python server on target machine and transfer that gz archive
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<img src="https://imgur.com/lqRGgxa.png"/>
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<img src="https://imgur.com/wvtMfeI.png"/>
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So we have ssh keys for user `noah`
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<img src="https://imgur.com/bMzSGFv.png"/>
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<img src="https://imgur.com/y6qFjCU.png"/>
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This `*` will accept any argument so let's see if we can run commands on the container
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<img src="https://imgur.com/ezLQ4c4.png"/>
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<img src="https://imgur.com/jbnQVE9.png"/>
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Appearently there's a CVE for docker exec
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https://github.com/Frichetten/CVE-2019-5736-PoC
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Download the `golang` file and compile it on your machine
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Set SUID on bash in `payload`
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<im src="https://imgur.com/fyEBhGO.png"/>
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Then compile the golang source code with `go build docker.go` transfer that binary to docker container execute it and in the same time execute `sh` on docker
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<img src="https://imgur.com/fyEBhGO.png"/>
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<img src="https://imgur.com/admmduH.png"/>
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<img src="https://imgur.com/qLv5VYu.png"/>
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Or if we simply want a reverse shell we could use a bash reverse shell payload instead of making /bin/bash a SUID
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<im src="https://imgur.com/CEf577v.png"/>
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<img src="https://imgur.com/mAVoURG.png"/>
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<img src="https://imgur.com/V0srjkt.png"/>
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