Rose & Marinaldo

Rose

In this post, we present our new Burp Suite extension "TLS-Attacker".
Using this extension penetration testers and security researchers can assess the security of TLS server configurations directly from within Burp Suite.
The extension is based on the TLS-Attacker framework and the TLS-Scanner, both of which are developed by the Chair for Network and Data Security.

You can find the latest release of our extension at: https://github.com/RUB-NDS/TLS-Attacker-BurpExtension/releases

TLS-Scanner

Thanks to the seamless integration of the TLS-Scanner into the BurpSuite, the penetration tester only needs to configure a single parameter: the host to be scanned. After clicking the Scan button, the extension runs the default checks and responds with a report that allows penetration testers to quickly determine potential issues in the server's TLS configuration. Basic tests check the supported cipher suites and protocol versions. In addition, several known attacks on TLS are automatically evaluated, including Bleichenbacher's attack, Padding Oracles, and Invalid Curve attacks.

Furthermore, the extension allows fine-tuning for the configuration of the underlying TLS-Scanner. The two parameters parallelProbes and overallThreads can be used to improve the scan performance (at the cost of increased network load and resource usage).

It is also possible to configure the granularity of the scan using Scan Detail and Danger Level. The level of detail contained in the returned scan report can also be controlled using the Report Detail setting.

Please refer to the GitHub repositories linked above for further details on configuration and usage of TLS-Scanner.

Scan History

If several hosts are scanned, the Scan History tab keeps track of the preformed scans and is a useful tool when comparing the results of subsequent scans.

Additional functions will follow in later versions

Currently, we are working on integrating an at-a-glance rating mechanism to allow for easily estimating the security of a scanned host's TLS configuration.

This is a combined work of Nurullah Erinola, Nils Engelbertz, David Herring, Juraj Somorovsky, Vladislav Mladenov, and Robert Merget. The research was supported by the European Commission through the FutureTrust project (grant 700542-Future-Trust-H2020-DS-2015-1).

If you would like to learn more about TLS, Juraj and Robert will give a TLS Training at Ruhrsec on the 27th of May 2019. There are still a few seats left.

Background:

Let's get started with a little bit background. Windows OSs have a User known as Administrator which is hidden by default. This user is there for security reasons (maybe it's the way around). Most of the users who use Windows are lame, sorry to say that but I'm not talking about you, they don't even know that such an invisible account exists so it is almost everytime without a password. But this Administrator user is a SU (Super User), that means you work wonders once you get access to this account. So our first task will be to make it visible and then we'll access it and using it's power privilages we'll remove password of other accounts (which is not really neccessary cuz you can access any user folder or file using Administrator Account).

Requirements:

1. Physical Access to the Victems computer.
2. A Live Bootable Kali/Backtrack Linux Pendrive or DVD.
(You can downoad Kali Linux here)

Steps:

1. Plug in the Live Bootable Pendrive/DVD into to victim's computer and then boot from it.

2. After accessing kali linux (I'm using Kali Linux) from victim's computer open a terminal.

3. Now we have to mount the drive on which the victim's OS is loaded. In my case it is sda2. So in order to mount that drive I'll type the command:
mount /dev/sda2 /media/temp

this means that I'm mounting the drive in folder /media/temp if you haven't created a temp folder in /media then you must create one by typing these command:
cd /
mkdir /media/temp

4. After mounting the OS we need to access the SAM file and make visible Administrator account using chntpw. It's so simple lemme show you how.
first we'll navigate to /media/temp/Windows/System32/config:
cd /media/temp/Windows/System32/config

now we display the list of users on our victim's computer:
chntpw SAM -l

You'll see an Administrator User there which is disabled. Now we'll enable that:
chntpw SAM -u Administrator

now type 4 and hit return

press 'y' to save changes to SAM file.

OK voila! the hard part is done.

5. Now restart your Computer and take out your Pendrive/DVD from your computer and boot into windows 8 OS. You should be able to see Administrator User on Logon screen now. If not then look for a backward pointing Arrow besides the user Login Picture. Click on that Arrow and you should see an Administrator User. Click on the Administrator Account and wait for a while until windows 8 sets it up.

6. After a while you get Access to the computer and you can access anything. Enjoy :)

7. What you want to remove the password? I don't think it's a stealth mode idea, is it? OK I'll tell you how to do that but It's not a good hacker way of doing.
Open up the command prompt, simple way to do it is:

Press Ctrl + 'x' and then Press 'a' and if prompted click yes.
After that Enter following commands:

net user
(This command will display all users on computer)

net user "User Name" newPassword
(This Command will change the Password of User Name user to newPassword).
OK you're done now logout and enter the new password. It will work for sure.

8. If you want to disable the Administrator Account again then type in command prompt:
net user Administrator /active:no

I tried it on Windows 8/8.1 all versions and it works. Guess what it works on all windows OSs.

Hope you enjoyed this tutorial. Don't forget to share it and yes always read the Disclaimer.

Related links

Rose & Marinaldo

quinta-feira, 18 de janeiro de 2024

Scanning TLS Server Configurations With Burp Suite

TLS-Scanner

Scan History

Additional functions will follow in later versions

More articles

Removing Windows 8/8.1 Password With CHNTPW

Background:

Requirements:

Steps:

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