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How do download viruses work? You download a malicious file, and then boom your entire computer is corrupted. How does the virus escape from the download folder and affect the whole computer? And a little side question, how do Anti-Viruses work? How do they, if they find a virus, just remove it? Also, can you train your computer to avoid viruses like giving it a digital vaccine or something?

So let's say a computer is brought in and has a virus or whatever. And a person wants to find out what downloaded link or how the computer was attacked. Is it possible to find out, or even gain access to the computer in the first place? Would you be able to identify phishing attacks also? from where and what took your information?

Un virus es un trozo de código malicioso que se replica a sí mismo y se propaga de una computadora a otra. Los virus se pueden propagar a través de diferentes medios, como correo electrónico, descargas de internet, dispositivos de almacenamiento extraíbles y redes sociales. Una vez que un virus ha infectado una computadora, puede realizar una variedad de acciones maliciosas, como borrar archivos, robar información confidencial, bloquear el acceso a determinados programas o sitios web, y mostrar anuncios no deseados. Existen diferentes tipos de virus, como virus de macro, virus de troyano y virus de gusano. Los virus de macro son pequeños fragmentos de código que se esconden en archivos de Microsoft Office, como Word o Excel. Cuando se abre el archivo infectado, el virus se ejecuta y puede realizar cualquier acción programada por el hacker. Los virus de troyano son programas que se disfrazan como aplicaciones legítimas, pero en realidad son herramientas de espionaje que permiten al hacker acceder a la información del usuario y controlar su computadora. Los virus de gusano son programas que se replican a sí mismos y se propagan a través de redes y dispositivos de almacenamiento extraíbles. Para protegerse contra los virus, es importante tener un software de seguridad actualizado y ser cauteloso al abrir correos electrónicos y descargar archivos de internet. También es recomendable evitar hacer clic en enlaces sospechosos en redes sociales y no conectar dispositivos de almacenamiento extraíbles a la computadora sin escanearlos primero con un software de seguridad. En resumen, los virus son trozos de código malicioso que se replican a sí mismos y se propagan a través de diferentes medios. Existen diferentes tipos de virus, como virus de macro, virus de troyano y virus de gusano, que pueden realizar una variedad de acciones maliciosas. Para protegerse contra los virus, es importante tener un software de seguridad actualizado, ser cauteloso al abrir correos electrónicos y descargar archivos de internet, evitar hacer clic en enlaces sospechosos en redes sociales y no conectar dispositivos de almacenamiento extraíbles a la computadora sin escanearlos primero con un software de seguridad. View full article

UVK was initially created in the beginning of 2010 as a simple but powerful manual virus removal and system repair tool. It introduced many new repair methods such as Register system DLLs, now used by other applications of the same kind. It has been growing up ever since, adding many useful features. For a complete list, see the Change log. The last most important recently added modules are the System booster and the Smart uninstaller. The System repair module is one of the most important UVK features. It contains fixes and tools to perform the most common system repair and maintenance tasks. It can also automate the most well known malware removal tools, and allows you to create your own automated third party apps, and professional reports. Unattended mode is supported. The System booster is a trustful and complete registry and file system cleaner. Not only does it recursively loop through the registry trying to find invalid references, like common registry cleaners do, but it analyzes each key and value separately, defining whether it's pointing to a file or another registry key/value and looping through a large array of possibilities to ensure the corresponding item does not exist before adding it to the list. In 64 bit Windows versions, it analyzes both native and Wow64 registry keys. This deep analysis makes this module a trustful registry cleaner, which ensures only real errors are reported. It also gives the user much more info about the errors it finds than other registry cleaners do. The Smart uninstaller is a fully featured software uninstaller for Windows. It allows to uninstall several programs at once, supports unattended mode (uninstall without user interaction), forced uninstall (for stubborn programs) and much more. Full info here. The Quick User Manager module provides you with all user account management options in a user friendly interface. Another important recently added module is the System immunization. This feature effectively prevents changes to the most vulnerable registry keys and files, and can optionally prevent running files in specific directories. It doesn't replace an anti-virus software, but it's a fine lightweight complement. The Tools and tweaks module provides you with many tools and tweeks for Windows repair. This includes easyly running the most useful Windows built-in tools, a file, folder and registry management feature, and lots of Windows tweaks. The System info module provides system information that can be specially useful if you're planning to reinstall Windows or trying to diagnose a hardware related problem. The information can be exported to an html file. [Hidden Content] [hide][Hidden Content]]

UVK - Ultra Virus Killer es una práctica herramienta dedicada a la protección íntegra de tu equipo a través de sus funcionalidades creadas para bloquear amenazas, reparar, limpiar y optimizar todos los rincones de Windows. Este antivirus está capacitado para detectar y eliminar de tu ordenador cualquier tipo de malware gracias a su suite de mantenimiento que te acerca en un simple clic a 12 aplicaciones básicas para el buen funcionamiento de tu equipo, como un gestor de archivos autoejecutables, un panel de administración de procesos o un análisis de registro entre otras opciones. UVK - Ultra Virus Killer también previene que se acumulen toolbars y buscadores que no has autorizado en tus navegadores así como páginas de inicio y otras configuraciones que no sueles realizar manualmente. Esta suite no se olvida de añadir opciones para realizar copias de seguridad, restauración del registro de Windows y eliminación de archivos y carpetas basura. [Hidden Content] [hide][Hidden Content]]

A simple shellcode encryptor/decryptor/executor to bypass anti-virus. [hide][Hidden Content]]

UVK Ultra Virus Killer Pro – is a powerful virus removal and Windows repair tool. With simple and intuitive interface, UVK allows users to detect and delete all types of malware and spyware from infected systems. It also includes lots of tools to repair windows after the disinfection. Features • Process manager • Startup entries and scheduled tasks • Windows services and drivers manager • Delete or replace file or folder • Scan & create log • UVK System repair • UVK System info 10.20.9.0 Release date: August 17 2021 Bug fixes and definition updates. [Hidden Content] [hide][Hidden Content]]

Worm, Virus & Trojan Horse: Ethical Hacking Tutorial Some of the skills that hackers have are programming and computer networking skills. They often use these skills to gain access to systems. The objective of targeting an organization would be to steal sensitive data, disrupt business operations or physically damage computer controlled equipment. Trojans, viruses, and worms can be used to achieve the above-stated objectives. In this article, we will introduce you to some of the ways that hackers can use Trojans, viruses, and worms to compromise a computer system. We will also look at the countermeasures that can be used to protect against such activities. What is a Trojan horse? A Trojan horse is a program that allows the attack to control the user’s computer from a remote location. The program is usually disguised as something that is useful to the user. Once the user has installed the program, it has the ability to install malicious payloads, create backdoors, install other unwanted applications that can be used to compromise the user’s computer, etc. The list below shows some of the activities that the attacker can perform using a Trojan horse. Use the user’s computer as part of the Botnet when performing distributed denial of service attacks. Damage the user’s computer (crashing, blue screen of death, etc.) Stealing sensitive data such as stored passwords, credit card information, etc. Modifying files on the user’s computer Electronic money theft by performing unauthorized money transfer transactions Log all the keys that a user presses on the keyboard and sending the data to the attacker. This method is used to harvest user ids, passwords, and other sensitive data. Viewing the users’ screenshot Downloading browsing historyhistor What is a worm? A worm is a malicious computer program that replicates itself usually over a computer network. An attacker may use a worm to accomplish the following tasks; Install backdoors on the victim’s computers. The created backdoor may be used to create zombie computers that are used to send spam emails, perform distributed denial of service attacks, etc. the backdoors can also be exploited by other malware. Worms may also slowdown the network by consuming the bandwidth as they replicate. Install harmful payload code carried within the worm. What is a Virus? A virus is a computer program that attaches itself to legitimate programs and files without the user’s consent. Viruses can consume computer resources such as memory and CPU time. The attacked programs and files are said to be “infected”. A computer virus may be used to; Access private data such as user id and passwords Display annoying messages to the user Corrupt data in your computer Log the user’s keystrokes Computer viruses have been known to employ social engineering techniques. These techniques involve deceiving the users to open the files which appear to be normal files such as Word or Excel documents. Once the file is opened, the virus code is executed and does what it’s intended to do. Trojans, Viruses, and Worms counter measures To protect against such attacks, an organization can use the following methods. A policy that prohibits users from downloading unnecessary files from the Internet such as spam email attachments, games, programs that claim to speed up downloads, etc. Anti-virus software must be installed on all user computers. The anti-virus software should be updated frequently, and scans must be performed at specified time intervals. Scan external storage devices on an isolated machine especially those that originate from outside the organization. Regular backups of critical data must be made and stored on preferably read-only media such as CDs and DVDs. Worms exploit vulnerabilities in the operating systems. Downloading operating system updates can help reduce the infection and replication of worms. Worms can also be avoided by scanning, all email attachments before downloading them.

ABOUT TOOL : Infect is a bash based script which is officially made for termux users and from this tool you can spread android virus by just sending link. This tool works on both rooted Android device and Non-rooted Android device. AVAILABLE ON : Termux TESTED ON : Termux REQUIREMENTS : internet external storage permission storage 400 MB 1gb ram FEATURES : [+] Dangerous virus tool ! [+] Updated maintainence ! [+] Easy for beginners ! [+] Working virus tool for termux ! [hide][Hidden Content]]

UVK Ultra Virus Killer – is a powerful virus removal and Windows repair tool. With simple and intuitive interface, UVK allows users to detect and delete all types of malware and spyware from infected systems. It also includes lots of tools to repair windows after the disinfection. Features • Process manager • Startup entries and scheduled tasks • Windows services and drivers • Delete or replace file or folder • Scan & create log • Run UVK Scripts • UVK tools • UVK System repair • System Info • UVK immunization [Hidden Content] [hide][Hidden Content]]

UVK's Execute Prevent feature can protect your PC from ransomware attacks. UVK can also automatically detect and repair the TEMP profile issue caused by the KB4532693 update. All downloads links provided in the table below are guaranteed to be free of adware and spyware. [Hidden Content] [hide][Hidden Content]]

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Download: [HIDE][Hidden Content]] Password: level23hacktools.com

To remove a Trojan, Virus, Worm, or other Malware from Windows, follow these steps: [Hidden Content]

Terms & Definitions Runpe Runpe is the part of the code that injects the functional part of the virus into the memory of the selected process. Injection The process for placing PayLoad in the memory of the selected process is called Injection ie Injection The most commonly injected processes are: svchost.exe Regasm.exe explorer.exe Default browser (chrome.exe, opera.exe, firefox.exe, iexplorer.exe) itselt - i.e. itself (meaning PayLoad is injected into a running process) vbc.exe cvtres.exe Payload explaining to beginners this means the file you chose to encrypt (i.e. a virus) Ecryption The algorithm that "Protects" converts the bytes of the selected file, making them unrecognizable and completely distinguishable from the original bytes of the file. Stub The program is created in order to store the encrypted file (encrypted file) and inject it into memory at startup. Where is it Private stub Same as above except you must be the only person using this Stub. The code is basically very different from the "Public Stubs" which makes it harder to detect when scanning Further adheres to "FUD" - Fully undetectet How does all this work? Figure 1.1 demonstrates what a crypter does with your server. Figure 1.1: ScanTime vs RunTime? Scantime Definition When a file is detected, the scan means: If before it is launched, Anti-Virus detects it or when a scan is running, the file was detected and marked as Threat Scantime Detect detections are caused by visible file instructions or "PE info" - such as build / icon, Cloned certificate, type of resources and file size. Basically, this means that the RAT / Server that you encrypt is practically no different because the file was encrypted, Bad, bad, or for Antivirus in a recognizable way. The safe place where you can scan Stub for ScanTime Detection is: MajyxScanner Scan4You AvDetect Rantaim Definition A detectable file at start-up means: If the file was launched and your Anti-Virus detected it and marked it as a threat and Blocked, Stopped, Deleted it. Runtime Detection is caused due to behavior. Basically how your file acts and runs can and cause detection at startup. Rat / Server that you have encrypted affect detection at startup If you want to avoid run-time detection (Runtime Detect) you must refrain from overloading the settings. RootKit (rootkit) is likely to be outcrop. It is best to use as few settings / functions as possible when creating your server and more from the cryptor. Why? Yes, because it is easy to detect the behavior of the well-known RAT, when it was never updated and changed. Crypters are updated and modified so it’s more reliable to use their settings to avoid Runtime Detect. The way to prevent some Runtime Detect is Anti Memory Scan. Which will basically deny access to the memory space where your server will work. Safe place to scan for Runtime Detection was Refud.Me but they shut it down! Scantime detection User Invoked: Basic / common detection is a common cause: Size, Icon and file information selected by the user. Example of common detection: Kazy (this may be the fault of "coders" in some cases) Bary Zusy Gen: * - this detector can be easily removed: By changing the icons - (low resolution / size icon) By changing the file information - (find the info of the trusted programs ) Add a bit of size - Pump File If all this does not work - Try to delete the file information (Using ResHacker) Caused by kripter / programmer (coder) : Heuristic Detections and Some General Detections PE Structure Detection Examples: Injector. * ( I.e. NOD32 Detection General Detection) Heur. * MSIL. * Runtime As called by: Selecting all possible settings in the RAT. Selection of common processes for inject Here are some instructions on how to fix all this: Avoid injecting processes like svchost.exe. Add a Delay (30 sec this can bypass the Rantaim of some Antivirus Add good info and icon Caused by Kripter / programmer (coder): Excessive use of Runpe without modification Copy & Paste code For a long time did not check Runtime Detection How not to corrupt your Server? What to Avoid: Double crypting - What article are you doing this from ??? Clicking on each individual function in the RAT and Crypter also Important Things to keep in mind: is your file native or .NET / managed? Native RATS are programmed without dependencies (i.e. C, C ++, VB6, Delphi) DarkComet Cybergate Prototype Netwire Babylon NanoCore LuminosityLink Immenent Monitor 3 njRAT PiRat Quesar rat Is your .NET file? It is recommended to use for the infection "itself". Using other settings can spoil your file. Is your file native? It is recommended not to use for the infection itself. Choose something else. Why is My File no longer FUD? Very important factors in how quickly it is detected: Virus spread Where the file was uploaded How big and popular and how many clients in your Cryptoservice What malware was encrypted Antiviruses are updated at least once a day! This is the work of the cryptor, they can become detectable. But Refud to clean it is possible, it is done in less than an hour! How not to spoil your cryptor FUD Time? What to avoid: Scanning to sites: which merge your files to antivirus companies Prohibited sites to scan (not all here): VirusTotal Anubis Jotti Upload your files to Uploading Host Files sites Prohibited sites for downloading your files (not all here): DropBox MediaFire GoogleDrive Do not send your files via Skype! (Picture 1.2) Picture 1.2: Things to do: Each antivirus will share samples from your PCs make sure that you disable any such service on your AVs. How not to annoy the owner of a krypter? What to avoid: Spamming Post the results of the detection on of.sayte in the comments ESPECIALLY then when these are your fault. Things that need to be done: If you send a support message to the support that your file does not work, specify all the settings that you used. be patient Follow the rules Don't be an idiot Read all instructions / video tutorials for setting up a crypter and then communicate with the support to solve your problems. Crypter Specifications and Description: Startup installation: The stub module that adds your encryption file to the list of Windows startup programs (startup / msconfig) Many different types: Use of a register (regedit), Tasks, Copying a file to Startup folder, other ... Startup Persistence: A module that checks if your file is removed from the Startup list. Anti Memory Scan: A module that prohibits access to everything that the injected payload will try to read (injecting a download virus into a process) Extremely useful for bypassing RunTime Detect Elevate Process / Privileges: Attempts to get admin rights for your file. Critical Process: Changes some attributes of the operation of your file, which will cause BSOD (Blue Screen of Death). Mutex: A very useful feature to make sure that your file does not work more than once at the same time. Melt file: Deletes / Deletes a file after it has been successfully launched. File Pumper: Adds a certain number of bytes (with a value of 0) at the end of the file, increasing its size, but does not violate any procedures at run time. Compress: Reduces the output size. Icon or Assembly Cloner: Copy the assembly data or icon of the selected file. (to get around some common detections) Encryption Algorithm: The function is used to convert RAT / Server bytes to something completely different. Delay Execution: Used for "Stop" - pause your file during operation. Over a period of time. Adding 30+ seconds will in some cases bypass RunTime Detection, believe it or not, it's up to you !. Binder: To add another file to the stub, after the stub starts, your RAT / Server will start but with this and the file you forgot. Downloader: Well, it obviously loads and runs the file from the given URL. USG - Unique Stub Generator: Be sure that when checking this function you use different stubs and they will be different from the previous crypt. In real life, this function simply changes the names of variables and some methods. Fake Message Box: Fake message at startup Hide File: the file will be Hidden so the victim cannot see the virus in the folder. Antis: Stop your file from running if some programs are running in the background: Popular Anti: Anti Virtual Machine (VMWare, VirtualBox and VirtualPC) Anti Sandbox Anti Wire Machine Anti Fiddler Anti Debugger Anti Anid Botkill: Searches for any existing files or processes that may be malware and kills / deletes them from the system. Spreaders: Copies the file in those places where it can infect other users. Spreaders do not work so do not fuck your brains Common spreaders: USB Rar / zip Chat / IM (Skype, Facebook, Omegle, Twitter) -Spamming Junk Code: Adds trackless trash code for Baipass Scantime Detection Remove Version Info: Removes file info Require Admin: Queries the UAC window asking to run the file as Admin. Certifcate Clone / Forger: Adds certificate to file