SquareZero

Escape is a medium difficulty Windows Active Directory machine that starts with an SMB share that guest authenticated users can download a sensitive PDF file. Inside the PDF file temporary credentials are available for accessing an MSSQL service running on the machine. An attacker is able to force the MSSQL service to authenticate to his machine and capture the hash. It turns out that the service is running under a user account and the hash is crackable. Having a valid set of credentials an att ...

Jeeves is not overly complicated, however, it focuses on some interesting techniques and provides a great learning experience. As the use of alternate data streams is not very common, some users may have a hard time locating the correct escalation path. EnumerationFirst I check for available open ports. nmap -p- --min-rate=10000 10.10.10.63 nmap -sC -sV -p80,135,445,50000 10.10.10.63 -oA ./nmap/jeeves -Pn Ports Service 80 msrpc Microsoft IIS httpd 10.0 135 msrpc Microsoft Windows RPC ...

Remote is an easy difficulty Windows machine that features an Umbraco CMS installation. Credentials are found in a world-readable NFS share. Using these, an authenticated Umbraco CMS exploit is leveraged to gain a foothold. A vulnerable TeamViewer version is identified, from which we can gain a password. This password has been reused with the local administrator account. Using psexec with these credentials returns a SYSTEM shell. EnumerationFirst I check for available open ports. nmap -p- --mi ...

Access is an easy difficulty machine, that highlights how machines associated with the physical security of an environment may not themselves be secure. Also highlighted is how accessible FTP/file shares can often lead to getting a foothold or lateral movement. It teaches techniques for identifying and exploiting saved credentials. EnumerationFirst I check for available open ports. nmap -p- --min-rate=10000 10.10.10.98 nmap -sC -sV -p21,23,80 10.10.10.98 -oA ./nmap/access Ports Service ...

Bastion is an easy level WIndows box which contains a VHD ( Virtual Hard Disk ) image from which credentials can be extracted. After logging in, the software MRemoteNG is found to be installed which stores passwords insecurely, and from which credentials can be extracted. EnumerationFirst I check for available open ports. nmap -p- --min-rate=10000 10.10.10.134 nmap -sC -sV -p21,22,80,135,139,445,5985,39517 10.10.10.134 -oA ./nmap/bastion.txt Ports Service 22 ssh OpenSSH for_Windows_7.9 ...

We participated in our vsCTF 2023 and we ended up being 1st! It was a day-long CTF but we solved 24 (out of 31) challenges. Some of the challenges were very interesting. Cant wait to play the next vsCTF event as CyberSpace WebChallenge → Sanity CheckDescription → you know what to do. Solution → We are presented with a website that pretty much running nothing. I tried opening the source code by right click and Ctrl+u. None of them worked We can view the source code by directly manupulating ...

Cronos is a medium Linux machine that focuses mainly on different vectors for enumeration and also emphasises the risks associated with adding world-writable files to the root crontab. This machine also includes an introductory-level SQL injection vulnerability EnumerationFirst I check for available open ports. nmap -sC -sV -A -oG beep beep.htb Ports Service 22 ssh OpenSSH 7.2p2 (4Ubuntu2.1) 53 DNS 80 Apache httpd 2.4.18 Next, I did directory brute-forcing but nothing interesting s ...

All Labs of JWT from Portswigger. ApprenticeJWT authentication bypass via unverified signatureLet’s login with the given credentials and intercept the request. Our Extension can automatically detect JSON tokens. Let’s change the user to administrator. After forwarding the request we can see the username is changed. Now let’s repeat the process and each time the username needs to be changed. NOTE → If you don’t want to change your username every time, after intercepting the request se ...

Beep has a very large list of running services, which can make it a bit challenging to find the correct entry method. This machine can be overwhelming for some as there are many potential attack vectors. Luckily, there are several methods available for gaining access. FixesDue to this machine’s age and the outdated TLS version, issues emerge.Before we move on, let’s solve a couple of them. Firefox Curl & gobuster-k, –insecure Allow insecure server connections EnumerationI begin as ...

Shocker, while fairly simple overall, demonstrates the severity of the renowned Shellshock exploit, which affected millions of public-facing servers. EnumerationAt first, I did a Nmap scan for open ports and services. nmap -sC -sV -p- 10.10.1.235 -oG shocker Ports Service 80 Apache httpd 2.4.18 ((Ubuntu)) 2222 OpenSSH 7.2p2 Ubuntu 4ubuntu2.2 I visit the website But there is nothing interesting. I start enumerating websites using FFUF ffuf -w /usr/share/dirb/wordlists/small.txt:FUZZ ...