What floods a computer with request until it shuts down and refuses to answer any request for information?

Denial Of Service attack or DoS attack floods a computer with requests until it shuts down and refuses to answer any requests for information. It is known as Denial of Service attacks because DoS attack renders the victim host useless to any other node on the network or outside the network.

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What is a distributed denial of service attack?

Distributed denial-of-service attacks target websites and online services. The aim is to overwhelm them with more traffic than the server or network can accommodate. The goal is to render the website or service inoperable. In some cases, the targeted victims are threatened with a DDoS attack or attacked at a low level.

Which of the following is a program that appears to be useful or desirable but does something malicious in the background?

Key Terms

time bombA virus that is triggered by the passage of time or on a certain date.
Trojan horseA computer program that appears to be something useful or desirable (such as a game or a screen saver), but at the same time does something malicious in the background without the user’s knowledge.

What type of virus was the famous Michelangelo virus?

Boot sector viruses


What virus can change its code to avoid detection?

Called VirLock, it can infect files, replicate itself and change form in addition to locking the computer screen of a host computer like traditional ransomware. Despite its capabilities, the polymorphic virus is not invulnerable.

What does a polymorphic virus do?

Polymorphic viruses are complex file infectors that can create modified versions of itself to avoid detection yet retain the same basic routines after every infection. To vary their physical file makeup during each infection, polymorphic viruses encrypt their codes and use different encryption keys every time.

What is a polymorphic worm?

A polymorphic worm is a specific type of worm that changed its structure in every appearance or new instance. A polymorphic worm is considered as one of the most dangerous threats over the Internet because it is hard to detect.


What is polymorphic shellcode?

It’s the very same functionality with completely different assembly instructions, and this is called a polymorphic shellcode. In theory (in a signature-based system), you need to keep samples (or signatures) of many different mutated shellcode versions, just to match one single functionality.

What is the meaning of polymorphic?

: the quality or state of existing in or assuming different forms: such as. a(1) : existence of a species in several forms independent of the variations of sex. (2) : existence of a gene in several allelic forms also : a variation in a specific DNA sequence.

What is the difference between polymorphic and metamorphic malware?

A polymorphic virus decrypts its code, runs that code, and then when propagating itself encrypts the decrypted code with a different key. A metamorphic virus simply runs its code and then when propagating itself mutates its code into different but functionally identical code.


How does polymorphic malware work?

Polymorphic malware is a type of malware that constantly changes its identifiable features in order to evade detection. By changing characteristics to generate a new signature, signature-based detection solutions will not recognize the file as malicious.

Why does polymorphism cause greater concern than traditional malware How does it affect detection?

How does it affect detection? Polymorphism cause greater concern than traditional malware because it changes they it appears to anti-virus software programs, making it undetectable by techniques that look for preconfigured signatures.

What is an encrypted virus?

An encrypted virus is a computer virus that encrypts its payload with the intention of making detecting the virus more difficult. An encrypted virus should not be confused with the more recent computer viruses like cryptolocker (ransomware) that encrypt the data on your hard drive and hold it for ransom.

Does encryption protect against viruses?

Encryption prevents viruses and other forms of malicious users from modifying, renaming, deleting, moving and reading the documents as well. Encryption is the most effective tool that truly provides the last line of defense against computer hackers.

Can you recover encrypted files?

In case system restore never solves the problem, there’s another way to recover ransomware encrypted files. Data recovery software also helps you recover ransomware encrypted files. You can download data recovery software such as EaseUS. It scans your desired drive to recover ransomware encrypted files.

How do I recover encrypted photos?

To decrypt that folder, follow these steps.

Open SSE Universal Encryption.Tap File/Dir Encryptor.Locate the encrypted file (with ns . enc extension).Tap the lock icon to select the file.Tap the Decrypt File button.Type the password used to encrypt the folder/file.Tap OK.

How do I unlock encrypted files?

Best Way to Open an Encrypted PDF File

Go to control panel, search “Certificate Manager” and then open it.There, in the left panel, you’ll see “Personal”. Now, click on the Action menu > All Tasks > Export.A certificate export wizard will appear, and you’ll need to click “Next”.

How do I open encrypted files with 7zip?

Open 7-Zip and navigate to where you saved your file. Double-click to open the zip file and display the contents. Double-click the document and you will be asked for a password. Enter the agreed password and the document will open.

Is it possible to open a password protected RAR file?

So if you know the password, you can easily open a password protected RAR file. Step 1: Run the WinRAR software on your computer and right-click the RAR file for which you want to delete a password. Select “Extract Files” from options.

How can I open a password protected PDF file?

Method 2: Using Google Chrome

Select the password-protected PDF file.Right-click on it and choose Open with Google Chrome.Now, right-click on the PDF and choose the Print option.Next, choose Microsoft Print to PDF and then press the print button.Now, give a name and saving path to the new pdf file.

How can I open a password protected Excel file without the password?

How to unprotect a password protected worksheet.

Step 1 Press ALT + F11 or click View Code on the Developers Tab.Step 2 Double click on the worksheet that is password protected.Step 3 Copy and paste the code below into the (Code) window. Step 4 Click on the Run Button or press F5.

How can I open a password protected zip file on Android?

Install Dual File Manager. This program lets you unzip password protected files. Try ArchiDroid and it will do your job… It extracts password-protected RAR, ZIP, TAR, GZIP, BZIP2 and 7zip files…

What kind of hackers break into systems for non malicious reasons?

White-hat hackers or ethical hackers They break security for non-malicious reasons. They usually work for the owner of the system trying to find system vulnerabilities. Black-hat hackers They break into secure networks to destroy, modify, or steal data; and to gain control of them for non-intended uses.

Which type of hackers break into systems for the thrill or to show off their skills?

Black hat hackers are normally responsible for creating malware, which is frequently used to infiltrate computerized networks and systems. They’re usually motivated by personal or financial gain, but can also participate in espionage, protests, or merely enjoy the thrill.

Do you need to know code to hack?

If you’re talking about a person who’s cracking programs, breaching into servers, using exploits in programs/websites, and does everything on its own, then hacking without programming is almost impossible. Serious hackers MUST know programming. Script kiddies just download premade hacks, no need for programming.

How many years does it take to be a hacker?

Most people who try can obtain a decent skill set in eighteen months to two years if they completely concentrate on it. However, hacking is a vast ocean which takes years to explore its mystery.

Is it hard to be a hacker?

Hacking is not difficult to perform because the people who have the know-how have shared what they have and what they know. People nowadays can use their inventions (tools), read their documents, or watch their videos online. Anyone can do these things now with little time and practice.

Can you teach yourself to hack?

While you can attempt to learn Ethical hacking on your own, you need to put in a lot of effort to gain the necessary skill, knowledge, and understand the basics of hacking and penetration testing. An Ethical hacking course provides you with the guidelines needed to become an effective Ethical Hacker.

What skills do you need to be an ethical hacker?

Ethical hackers need to know a wide variety of techniques and skills when it comes to breaking into a system….Top 10 Ethical Hacker Skills

Malware. NICE 2.0 Framework. IoT Device Security. Cloud. Artificial Intelligence and Machine Learning. Analytical Thinking. SQL. Cryptography.

What qualifications do you need to be an ethical hacker?

You will not necessarily need a degree to become an Ethical Hacker. However, you will need extensive experience with computer systems, and there are a number of Cyber Security Certification Programme,here.

What does GREY hat hacker mean?

Grey hat hackers are a blend of both black hat and white hat activities. Often, grey hat hackers will look for vulnerabilities in a system without the owner’s permission or knowledge. If issues are found, they will report them to the owner, sometimes requesting a small fee to fix the issue.

How much do white hat hackers make?

What Kind Of Salaries Do White Hat Hackers Make? The average salary that a white hat hacker can expect to earn is $71,000 annually. Many ethical hackers can also expect to earn bonuses ranging from $15,000 – $20,000. If you become an expert in this field, you could earn as much as $120,000 per annum.

Who is the best white hat hacker?

Below are some of the most influential white hat hackers.

Tim Berners-Lee. One of the most famous names in computer science, Berners-Lee is the founder of the World Wide Web. Greg Hoglund. Richard M. Dan Kaminsky. Jeff Moss. Charlie Miller. Linus Torvalds. Kevin Mitnick.

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How much do GREY hat hackers make?

The average Certified Ethical Hacker makes $72,000 per year with a range from $24,000 to $130,000. White Hat Hackers, also called Ethical Hackers are hired by a company either full time or as independent contractors. Their job is to find the cracks in the code before Black Hats or Grey Hats find it.