Direito - Unip - DNA 2,03/08

quinta-feira, 21 de maio de 2020

Bypass Hardware Firewalls

This is just a collection of links about my DEF CON 22 presentation, and the two tools I released:

Slides:
http://www.slideshare.net/bz98/defcon-22-bypass-firewalls-application-white-lists-secure-remote-desktops-in-20-seconds

Tools:
https://github.com/MRGEffitas/Write-into-screen
https://github.com/MRGEffitas/hwfwbypass

Presentation video from Hacktivity:
https://www.youtube.com/watch?v=KPJBckmhtZ8

Technical blog post:
https://blog.mrg-effitas.com/bypass-hardware-firewalls-def-con-22/

Have fun!

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Workshop And Presentation Slides And Materials

All of our previous workshop and presentation slides and materials are available in one location, from Google Drive.

From now on, we are only going to keep the latest-greatest version of each talk/workshop and announce changes on Twitter.

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Scanning TLS Server Configurations With Burp Suite

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.

More information

quarta-feira, 20 de maio de 2020

Linux Stack Protection By Default

Modern gcc compiler (v9.2.0) protects the stack by default and you will notice it because instead of SIGSEGV on stack overflow you will get a SIGABRT, but it also generates coredumps.

In this case the compiler adds the variable local_10. This variable helds a canary value that is checked at the end of the function.
The memset overflows the four bytes stack variable and modifies the canary value.

The 64bits canary 0x5429851ebaf95800 can't be predicted, but in specific situations is not re-generated and can be bruteforced or in other situations can be leaked from memory for example using a format string vulnerability or an arbitrary read wihout overflowing the stack.

If the canary doesn't match, the libc function __stack_chck_fail is called and terminates the prorgam with a SIGABORT which generates a coredump, in the case of archlinux managed by systemd and are stored on "/var/lib/systemd/coredump/"

❯❯❯ ./test
*** stack smashing detected ***: terminated
fish: './test' terminated by signal SIGABRT (Abort)

❯❯❯ sudo lz4 -d core.test.1000.c611b7caa58a4fa3bcf403e6eac95bb0.1121.1574354610000000.lz4
[sudo] password for xxxx:
Decoding file core.test.1000.c611b7caa58a4fa3bcf403e6eac95bb0.1121.1574354610000000
core.test.1000.c611b : decoded 249856 bytes

❯❯❯ sudo gdb /home/xxxx/test core.test.1000.c611b7caa58a4fa3bcf403e6eac95bb0.1121.1574354610000000 -q

We specify the binary and the core file as a gdb parameters. We can see only one LWP (light weight process) or linux thread, so in this case is quicker to check. First of all lets see the back trace, because in this case the execution don't terminate in the segfaulted return.

We can see on frame 5 the address were it would had returned to main if it wouldn't aborted.

Happy Idea: we can use this stack canary aborts to detect stack overflows. In Debian with prevous versions it will be exploitable depending on the compilation flags used.
And note that the canary is located as the last variable in the stack so the previous variables can be overwritten without problems.

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Files Download Information

After 7 years of Contagio existence, Google Safe Browsing services notified Mediafire (hoster of Contagio and Contagiominidump files) that "harmful" content is hosted on my Mediafire account.

It is harmful only if you harm your own pc and but not suitable for distribution or infecting unsuspecting users but I have not been able to resolve this with Google and Mediafire.

Mediafire suspended public access to Contagio account.

The file hosting will be moved.

If you need any files now, email me the posted Mediafire links (address in profile) and I will pull out the files and share via other methods.

P.S. I have not been able to resolve "yet" because it just happened today, not because they refuse to help. I don't want to affect Mediafire safety reputation and most likely will have to move out this time.

The main challenge is not to find hosting, it is not difficult and I can pay for it, but the effort move all files and fix the existing links on the Blogpost, and there are many. I planned to move out long time ago but did not have time for it. If anyone can suggest how to change all Blogspot links in bulk, I will be happy.

P.P.S. Feb. 24 - The files will be moved to a Dropbox Business account and shared from there (Dropbox team confirmed they can host it )

The transition will take some time, so email me links to what you need.

Thank you all
M

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How To Start | How To Become An Ethical Hacker

Are you tired of reading endless news stories about ethical hacking and not really knowing what that means? Let's change that!

This Post is for the people that:

Have No Experience With Cybersecurity (Ethical Hacking)
Have Limited Experience.
Those That Just Can't Get A Break

OK, let's dive into the post and suggest some ways that you can get ahead in Cybersecurity.

I receive many messages on how to become a hacker. "I'm a beginner in hacking, how should I start?" or "I want to be able to hack my friend's Facebook account" are some of the more frequent queries. Hacking is a skill. And you must remember that if you want to learn hacking solely for the fun of hacking into your friend's Facebook account or email, things will not work out for you. You should decide to learn hacking because of your fascination for technology and your desire to be an expert in computer systems. Its time to change the color of your hat 😀

I've had my good share of Hats. Black, white or sometimes a blackish shade of grey. The darker it gets, the more fun you have.

If you have no experience don't worry. We ALL had to start somewhere, and we ALL needed help to get where we are today. No one is an island and no one is born with all the necessary skills. Period.OK, so you have zero experience and limited skills…my advice in this instance is that you teach yourself some absolute fundamentals.

Let's get this party started.

What is hacking?

Hacking is identifying weakness and vulnerabilities of some system and gaining access with it.

Hacker gets unauthorized access by targeting system while ethical hacker have an official permission in a lawful and legitimate manner to assess the security posture of a target system(s)

There's some types of hackers, a bit of "terminology".
White hat — ethical hacker.
Black hat — classical hacker, get unauthorized access.
Grey hat — person who gets unauthorized access but reveals the weaknesses to the company.
Script kiddie — person with no technical skills just used pre-made tools.
Hacktivist — person who hacks for some idea and leaves some messages. For example strike against copyright.

Skills required to become ethical hacker.

Curosity anf exploration
Operating System
Fundamentals of Networking

*Note this sites

CEH: Gathering Host And Network Information | Scanning

Scanning

It is important that the information-gathering stage be as complete as possible to identify the best location and targets to scan. After the completion of footprinting and information gathering methodologies, scanning is performed.
During scanning, the hacker has vision to get information about network an hosts which are connected to that network that can help hackers to determine which type of exploit to use in hacking a system precisely. Information such as an IP addresses, operating system, services, and installed applications.

Scanning is the methodology used to detect the system that are alive and respond on the network or not. Ethical hackers use these type of scanning to identify the IP address of target system. Scanning is also used to determine the availability of the system whether it is connected to the network or not.

Types Of Scanning

Network Scanning	Identifies IP addresses on a given network or subnet
Port Scanning	Determines open, close, filtered and unfiltered ports and services
Vulnerability Scanner	Detect the vulnerability on the target system

Port Scanning

Port scanning is the process of identifying open and available TCP/IP ports on a system. Port-scanning tools enable a hacker to learn about the services available on a given system. Each service or application on a machine is associated with a well-known port number. Port Numbers are divided into three ranges:

Well-Known Ports: 0-1023
Registered Ports: 1024-49151
Dynamic Ports: 49152-6553

Network Scanning

Network scanning is performed for the detection of active hosts on a network either you wanna attack them or as a network administrator. Network-scanning tools attempt to identify all the live or responding hosts on the network and their corresponding IP addresses. Hosts are identified by their individual IP addresses.

Vulnerability Scanning

This methodology is used to detect vulnerabilities of computer systems on a network. A vulnerability scanner typically identifies the operating system and version number, including applications that are installed. After that the scanner will try to detect vulnerabilities and weakness in the operating system. During the later attack phase, a hacker can exploit those weaknesses in order to gain access to the system. Moreover, the vulnerability scanner can be detected as well, because the scanner must interact over the network with target machine.

The CEH Scanning Methodology

As a CEH, you should understand the methodology about scanning presented in the figure below. Because this is the actual need of hackers to perform further attacks after the information about network and hosts which are connected to the network. It detects the vulnerabilities in the system bu which hackers can be accessible to that system by exploitation of that vulnerabilities.

terça-feira, 19 de maio de 2020

How To Hack Any Whatsapp Account In 2020

The article will also be broken down into different subtopics and subcategories. This to make it easy for those who are just interested in skimming through the article to pick the part of WhatsApp hack they are most interested in. Just incase you don't have enough time to go through the entire article.

Search queries like these are a common place; Can WhatsApp be hacked? Can you read WhatsApp messages? How safe is the most popular trade fair in the world? This article gives you all the solution you need to hack any WhatsApp account, as well as how to protect yourself from a WhatsApp hack attack.

Although the messenger is now on an end-to-end encryption, WhatsApp is still not totally safe from espionage. WhatsApp chats and messages can still be accessed and read remotely, and old &deleted WhatsApp chats and messages retrieved.

WhatsApp Spy: Hack WhatsApp Chats and Messages

A very simple solution is to use a software that can hack WhatsApp remotely. All manufacturers offer to read the WhatsApp messages an extra web portal. In addition to the Whatsapp messages but can also spy on other messengers. So you can also have access to social media accounts.

The software may only be installed on a smartphone. If the user of the smartphone has been informed about the installation and effects.

WhatsApp Hacker: 3 Steps to Hack WhatsApp in 2020

You can hack Whatsapp using a second cell phone. No extra SIM card is necessary for this. The guide also works with a tablet. With this method, the other phone only needs to clone WhatsApp messages is internet connection.

The trick to hack Whatsapp successfully is not a software bug. It's the way WhatsApp has developed the setup wizard. Since there are no user accounts with passwords and you log in via the mobile number, here lies the vulnerability. But you can also protect yourself from the Whatsapp hack.

Hack WhatsApp Chat with the Best WhatsApp Hacking Tool

To read Whatsapp messages, the mobile phone number of the target must be known. The cell phone can remain locked. There is no need to install software to hack and read Whatsapp messages. Even with the PIN or fingerprint, the Whatsapp account can be hacked.

STEP 1: Create a New WhatsApp Account

To hack an account from Whatsapp, the app from the App Store must be installed on the second cell phone. After the installation of Whatsapp, target's phone number is entered. A confirmation request must be waited until access to the smartphone of the victim exists.

STEP 2: WhatsApp Account Confirmation

The confirmation of the Whatsapp account is the actual security risk of the messenger. Whatsapp usually confirms the registration via SMS. Occasionally the confirmation will also be sent by automated phone call via a phone call.

Calls and text messages can be read and taken by anyone even when the screen is locked. So that the WhatsApp hack does not stand out, the SMS must be removed from the start screen by swiping.

STEP 3: Enter Confirmation

The stolen verification PIN is now entered on the second smartphone. As a result, the WhatsApp account has been taken over by you. You can read the WhatsApp messages, which respond to this mobile phone number.

The downside to this trick is that the victim immediately notices the Whatsapp hack as soon as Whatsapp is opened. If the victim goes through the sign-in process again. The attacker loses access to the messages and no Whatsapp messages can be read.

How to Hack Someone's WhatsApp in 2020

A good way to hack a WhatsApp account is to hack whatsapp online. Here you can read WhatsApp messages via a browser and also write. The target user can continue to use his cell phone (works for iOS, Android phone etc) and does not notice the WhatsApp hack.

STEP 1: Access the Cell Phone

In order to be able to read WhatsApp messages by installing software. Access to the unlocked smartphone is required for a short time. In addition, cell phone, a computer or laptop is necessary. On this the Whatsapp messages will be read later.

STEP 2: Access WhatsApp Web

If you have access to the unlocked smartphone, Whatsapp must be started there. The Whatsapp settings include Whatsapp Web . If this is selected, Whatsapp opens a QR code scanner with the hint to open WhatsApp Web in the browser.

If the QR code is scanned in the browser with the smartphone. There is a permanent connection and Whatsapp messages can be read. If you want to hack Whatsapp in this way. You have full access to all incoming messages and you can even write messages yourself.

STEP 3: Read WhatsApp Messages

The target usually sees this Whatsapp hack only when the settings are invoked to Whatsapp Web in the app. Whatsapp messages can be read via the browser. Regardless of whether the smartphone is on home Wi-Fi or on the move. You can also hack group chats admin by just having any of the contact details.

WhatsApp Hack: How to Hack any WhatsApp account

Which is the most popular messaging app globally? Of course, you can use different apps from Android or iOS to send and receive messages. But Whatsapp remains everyone's favorite globally!

Whatsapp is one of the popular apps in the world. There are more than 2 billion active users on Whatsapp, messaging daily with the app. Why do people love WhatsApp? Whatsapp is very convenient and easy to use.

Other messaging apps like Facebook Messenger, still needs a special account to sign up for this app. If you change a new app, you'll need to add another account. This can be stressful, as you have to remember a lot of new passwords and usernames.

HACKER NT

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How To Insert Data Into Database | Tutorial 3

Welcome to my another tutorial of PHP and MYSQL. In the previous tutorial I've briefly discussed How to make a PHP file and How to save the PHP file in the root directory of the server. How to run PHP script over the Web Browser etc.

Now in this tutorial I've discussed about inserting data into database by getting the values from user with the help of HTML form. One thing should be remembered that getting a values from users by HTML form is the only way to get values from users in PHP.

How To Insert Data into Database

Step 1:

Open your text editor and create HTML form.

Step 2:

Make a database connection in PHP.

Step 3:

Write an INSERT query for the sake of insertion data into database like INSERT INTO table_Name(table_Attribute1, table_Attribute2....) VALUES('1', 'Alex'...); etc. Now watch the video to make a better understanding the concept of insertion.

Download wpCrack