Free Course Site
The Git & Github Bootcamp

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Master the essentials and the tricky bits: rebasing, squashing, stashing, reflogs, blobs, trees, & more! What you’ll learn Understand how Git works behind the scenes Explain the difference Git objects: trees, blobs, commits, and annotated tags Master the essential Git workflow: adding & committing Work with Git branches Perform Git merges and resolve merge conflicts […]

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Unsupervised Machine Learning with Python Course

Unsupervised Machine Learning with Python Course

Unsupervised Machine Learning Clustering and Dimension Reduction Algorithms with Python Implementation and Applications
What you’ll learn

Unsupervised Machine Learning with Python Course
*

Clustering Algorithms: Hierarchical, DBSCAN, K Means, Gaussian Mixture Model
*

Dimensions Reduction: Principal Component Analysis (PCA)
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Implementation of clustering algorithms and principal component analysis in Python
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Applications of clustering and PCA using real-world data
Requirements

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Basic knowledge of Linear Algebra including vectors, matrices, transpose, matrix multiplications, linear spaces
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Basic knowledge of Probability and Statistics including mean, covariance, and normal distributions
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Ability to program in Python 3
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Ability to run Python 3 programs on the local machine in Jupyter notebooks and command window
Description
Unsupervised Machine Learning involves finding patterns in datasets.

After taking this course, students will be able to understand, implement in Python, and apply algorithms of Unsupervised Machine Learning to real-world datasets.

This course is designed for:

* Scientists, engineers, and programmers, and others interested in machine learning/data science
* No prior experience with machine learning is needed
* Students should have knowledge of
* Basic linear algebra (vectors, transpose, matrices, matrix multiplication, inverses, determinants, linear spaces)
* Basic probability and statistics (mean, covariance matrices, normal distributions)
* Python 3 programming
The core of this course involves a detailed study of the following algorithms:

Clustering: Hierarchical, DBSCAN, K Means & Gaussian Mixture Model

Dimension Reduction: Principal Component Analysis
The course presents the math underlying these algorithms including normal distributions, expectation-maximization, and singular value decomposition. This course also presents a detailed explanation of code design and implementation in Python, including the use of vectorization for speed up, and metrics for measuring the quality of clustering and dimension reduction.


The course codes are then used to address case studies involving real-world data to perform dimension reduction/clustering for the Iris Flowers Dataset, MNIST Digits Dataset (images), and BBC Text Dataset (articles).

Plenty of examples are presented and plots and animations are used to help students get a better understanding of the algorithms.

The course also includes a number of exercises (theoretical, Jupyter Notebook, and programming) for students to gain additional practice.

All resources (presentations, supplementary documents, demos, codes, solutions to exercises) are downloadable from the course Github site.

Students should have a Python installation, such as the Anaconda platform, on their machine with the ability to run programs in the command window and in Jupyter Notebooks
Who this course is for:

* Scientists, engineers, and programmers interested in data science/machine learning
* Last updated 4/2021
Content From: https://www.udemy.com/course/unsupervised-machine-learning-with-python/
Download Now
More course: Machine Learning Regression Masterclass
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Free Course Site
Complete Web Application Hacking & Penetration Testing

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Learn hacking web applications, hacking websites and penetration test with my ethical hacking course and becomer Hacker What you’ll learn Advanced Web Application Penetration Testing Terms, standards, services, protocols and technologies Setting up Virtual Lab Environment Software and Hardware Requirements Modern Web Applications Web Application Architectures Web Application Hosting Web Application Attack Surfaces Web Application […]

The post Complete Web Application Hacking & Penetration Testing appeared first on Free Course Site.

Deep Web
r/DNLounge $100 Giveaway 🎉

Announcing r/DNLounge! 🎉

To enter:

*
Join r/DNLounge

*
Comment on this post
Prize: $100 Amazon Giftcard

1 winner will be chosen from the comments and announced in r/DNLounge sometime in the next 5 days

:D

submitted by /u/palomari
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___________________________
@hacking_Attack
@Hacking_Video

https://preview.redd.it/wa2b92eff0z61.jpg?width=640&crop=smart&auto=webp&s=9e44fc55ad0a528cb0b4f7a4873b0625942633b4 submitted by /u/TrollsTheKing
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Deep Web
Does the deeper hold info the "mainstream media" & "Establishment" don't want you to know?

I put those words in quotes because I spend alot of time debunking those who tend to use the as insults or smears

But I wonder, would the evidence to prove them right exist in the deepweb? I mean the people I argue with don't seem to know, but the possibility is bugging me.

submitted by /u/ryu289
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Deep Web
is dark.fail back?

I was looking at the site and i said it was highjacked but its back on a .onion link only, is this true or just apart of the scam?

submitted by /u/Darcnight311
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hacking: security in practice
Ireland's health service shuts down IT systems over 'significant ransomware attack'

https://external-preview.redd.it/UQd_Tzmr5BqAR_xyQZt5HWARA_HhOkz70gyFNwC3wcU.jpg?width=640&crop=smart&auto=webp&s=99b21f61d47cffeccfc505fcf2b33ebf0e8b8f5b submitted by /u/pintmaan
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Hacking on Medium
Latest news on next-gen Auth Tech in Korea (May 14, 2021) #Cybersecurity in Korea #White Hat…

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Latest news on next-gen Auth Tech in Korea

Continue reading on Medium »

Hacking on Medium
My OSCP Journey

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How I passed my OSCP on the first attempt. I have written a blog that summarises my journey to get OSCP. This blog contains important…

Continue reading on Medium »

Free Course Site
Developing a Multithreaded Kernel From Scratch!

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Build a multitasking operating system and kernel with an interactive shell! What you’ll learn How to create a kernel from scratch How to create a multi-tasking kernel How to handle malicious or problematic programs in your operating system. Terminating them if they misbehave. How memory works in computers The difference between kernel land, user land […]

The post Developing a Multithreaded Kernel From Scratch! appeared first on Free Course Site.

KitPloit - PenTest Tools!
R77-Rootkit - Fileless Ring 3 Rootkit With Installer And Persistence That Hides Processes, Files, Network Connections, Etc...

https://1.bp.blogspot.com/-nUpYJ0HKJJI/YJgjUPPxPcI/AAAAAAAAWIU/Q8DfwgNYBdY0_CWji-F3bnFm6yfGhg5DACNcBGAsYHQ/w640-h402/r77-rootkit_1.png Ring 3 rootkitr77 is a ring 3 Rootkit that hides following entities from all processes:

* Files, directories, junctions, named pipes, scheduled tasks
* Processes
* CPU usage
* Registry keys & values
* Services
* TCP & UDP connections

It is compatible with Windows 7 and Windows 10 in both x64 and x86 editions. Hiding by prefixAll entities where the name starts with "$77"are hidden. https://1.bp.blogspot.com/-t6nvUPFnhvo/YJgjeGyw35I/AAAAAAAAWIc/cXowU9ZVysEmEg1pBoCAQgMZR0QvZD6egCNcBGAsYHQ/w640-h402/r77-rootkit_1.png Configuration SystemThe dynamic configuration system allows to hide processes by PID and by name, file system items by full path, TCP & UDP connections of specific ports, etc. https://1.bp.blogspot.com/-2x8F6vzxiuY/YJgjh5CqpVI/AAAAAAAAWIg/KCalED57W_UAmqFABBagBwIainHM2mHSACNcBGAsYHQ/w640-h348/r77-rootkit_2.png The configuration is stored in HKEY_LOCAL_MACHINE\SOFTWARE\$77configand is writable by any process without elevated privileges. The DACL of this key is set to grant full access to any user.

The $77configkey is hidden when RegEdit is injected with the rootkit. Installerr77 is deployable using a single file "Install.exe". It installs the r77 service that starts before the first user is logged on. This background process injects all currently running processes, as well as processes that spawn later. Two processes are needed to inject both 32-bit and 64-bit processes. Both processes are hidden by ID using the configuration system. Uninstall.exeremoves r77 from the system and gracefully detaches the rootkit from all processes. Child process hookingWhen a process creates a child process, the new process is injected before it can run any of its own instructions. The function NtResumeThreadis always called when a new process is created. Therefore, it's a suitable target to hook. Because a 32-bit process can spawn a 64-bit child process and vice versa, the r77 service provides a named pipe to handle child process injection requests.

In addition, there is a periodic check every 100ms for new processes that might have been missed by child process hooking. This is necessary because some processes are protected and cannot be injected, such as services.exe. In-memory injectionThe rootkit DLL (r77-x86.dll and r77-x64.dll) can be injected into a process from memory and doesn't need to be stored on the disk. Reflective DLL injection is used to achieve this. The DLL provides an exported function that when called, loads all sections of the DLL, handles dependency loading and relocations, and finally calls DllMain. Fileless persistenceThe rootkit resides in the system memory and does not write any files to the disk. This is achieved in multiple stages.

Stage 1: The installer creates two scheduled tasks for the 32-bit and the 64-bit r77 service. A scheduled task does require a file, named $77svc32.joband $77svc64.jobto be stored, which is the only exception to the fileless concept. However, scheduled tasks are also hidden by prefix once the rootkit is running.

The scheduled tasks start powershell.exewith following command line: [Reflection.Assembly]::Load([Microsoft.Win32.Registry]::LocalMachine.OpenSubkey('SOFTWARE').GetValue('$77stager')).EntryPoint.Invoke($Null,$Null) The command is inline and does not require a .ps1 script. Here, the .NET Framework capabilities of PowerShell are utilized in order to load a[...]

C# executable from the registry and execute it in memory. Because the command line has a maximum length of 260 (MAX_PATH), there is only enough room to perform a simple Assembly.Load().EntryPoint.Invoke(). https://1.bp.blogspot.com/-Qs9jiVd3h90/YJgjmSczOQI/AAAAAAAAWIo/AVRzugf7K5gDqcYqGCz3gT9qoW8FBny8wCNcBGAsYHQ/w640-h280/r77-rootkit_3.png https://1.bp.blogspot.com/-1Xz7qgcaA0w/YJgjmXMq_0I/AAAAAAAAWIk/Zlk2ZqrCjCs9BH-xZH-fNjwQkaSkBliCwCNcBGAsYHQ/w640-h328/r77-rootkit_4.png Stage 2: The executed C# binary is the stager. It will create the r77 service processes using process hollowing. The r77 service is a native executable compiled in both 32-bit and 64-bit separately. The parent process is spoofed and set to winlogon.exe for additional obscurity. In addition, the two processes are hidden by ID and are not visible in the task manager. https://1.bp.blogspot.com/-5iBktGERTAw/YJgjp9q2PvI/AAAAAAAAWIs/6CypmVISpJo6oa00GMPBZtXNygPJs4Z9ACNcBGAsYHQ/w640-h300/r77-rootkit_5.png No executables or DLL's are ever stored on the disk. The stager is stored in the registry and loads the r77 service executable from its resources.

The PowerShell and .NET dependencies are present in a fresh installation of Windows 7 and Windows 10. Please review the documentation for a complete description of the fileless initialization. HookingDetours is used to hook several functions from ntdll.dll. These low-level syscall wrappers are called by any WinAPI or framework implementation.

* NtQuerySystemInformation
* NtResumeThread
* NtQueryDirectoryFile
* NtQueryDirectoryFileEx
* NtEnumerateKey
* NtEnumerateValueKey
* EnumServiceGroupW
* EnumServicesStatusExW
* NtDeviceIoControlFile

The only exception is advapi32.dll. Two functions are hooked to hide services. This is because the actual service enumeration happens in services.exe, which cannot be injected. Test environmentThe Test Console can be used to inject r77 to or detach r77 from individual processes. https://1.bp.blogspot.com/-2uYmMhxNltk/YJgjtL87hdI/AAAAAAAAWIw/J5_Dm5A9fAQZjYJSTIlzArGqRcKWCruUgCNcBGAsYHQ/w640-h486/r77-rootkit_6.png Technical DocumentationPlease read the technical documentation to get a comprehensive and full overview of r77 and its internals, and how to deploy and integrate it. Project Pagebytecode77.com/r77-rootkit Download R77-Rootkit