Computer and internet security

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Computer and internet security
hoshmand kareem salih
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Computer and internet security

  1. 1. UNIVERSITY OF RAPARIN FACULTY OF PRIMARY EDUCATION COMPUTER SCIENCE DEPARTMENT Computer & Internet Security HOSHMAND KAREEM SALIH
  2. 2. • What is the origin of the name “malware” ? • Malicious software Malware Computer & Internet Security HOSHMAND KAREEM SALIH • What is the definition of malware ? • Software that is intended to damage or disable computers and computer systems • Any kind of unwanted software that is installed without your adequate consent viruses, worms and Trojan horses are examples of malicious software that are often grouped of malicious software that are often grouped together and referred to as malware.
  3. 3. There are many types of malware such as • Worms • Virus • Spyware • Trojan horse • Scare ware • Ransom ware Types of malware Computer & Internet Security HOSHMAND KAREEM SALIH
  4. 4. • Activity • Make copies of themselves again and again on • Local drive • Network shares • USB drives • Purpose • Reproduce • Worms does not need to attach itself to an exiting program Types of malware (worms) Computer & Internet Security HOSHMAND KAREEM SALIH
  5. 5. • Activity • When executed – usually by a human, replicates by inserting copies of itself (possibly modified) into other computer programs, data files, or the boot sector of the hard drive; when this replication succeeds, the affected areas are then said to be "infected.“ • Purpose • Harm computers Types of malware (virus) Computer & Internet Security HOSHMAND KAREEM SALIH
  6. 6. • What is it? • It is any software which takes information from your computer without your knowledge or consent. • Types of Spyware (just three of them) • Trojans • Web Bugs • Advertiser software Types of malware (Spyware) Computer & Internet Security HOSHMAND KAREEM SALIH
  7. 7. • Activity • Appears to perform a desirable function but instead drops a malicious payload, often including a backdoor allowing unauthorized access • Purpose • Gains privileged access to the operating system • Trojans Does not need to attach itself to an existing program. Types of malware (Spyware) Trojan horse Computer & Internet Security HOSHMAND KAREEM SALIH
  8. 8. • It gets the idea and the name from the story of the Trojan horse in troy. Types of malware (Spyware) Trojan horse Computer & Internet Security HOSHMAND KAREEM SALIH
  9. 9. • Appears to be beneficial from a security perspective but provides limited or no security, generates erroneous or misleading alerts, or attempts to lure users into participating in fraudulent transactions. Types of malware (Scare ware) Computer & Internet Security HOSHMAND KAREEM SALIH
  10. 10. • Restricts access to the computer system that it infects • Encrypt files lock system • Displays messages intended to coax the user into paying • Demands a ransom in order for the restriction to be removed Types of malware (ransom ware) Computer & Internet Security HOSHMAND KAREEM SALIH
  11. 11. • The reasons • Economical • Personal • Political • Others Why do malware writers write malware? Computer & Internet Security HOSHMAND KAREEM SALIH
  12. 12. • Economical • Stealing sensitive information which is then sold on the black market. • Take down networks • Personal • Revenge , Vandalism , Experimental / research , Hobby and art • Political • Gaining information about different political parts • Spying on political parts or persons • Political messages Why do malware writers write malware? Computer & Internet Security HOSHMAND KAREEM SALIH
  13. 13. • A system or group of systems that enforces an access control policy between two networks. Firewall Visible IP Address Internal Network PC Servers Host
  14. 14. • Hackers • A person who accesses a computer or network illegally. • Various types • Black • Grey • White Hackers and Crackers Computer & Internet Security • Crackers • A person who accesses a computer or network illegally but has the intent of destroying data, stealing information, or other malicious action. HOSHMAND KAREEM SALIH
  15. 15. Some systems for hacking Computer & Internet Security HOSHMAND KAREEM SALIH
  16. 16. A system for cracking (OllyICE) Computer & Internet Security HOSHMAND KAREEM SALIH
  17. 17. • Use an Antimalware app • Installing an antimalware app and keeping it up to date can help defend your PC against viruses and other malware (malicious software). Antimalware apps scan for viruses, spyware, and other malware trying to get into your email, operating system, or files. New threats can appear daily, so check the antimalware manufacturer's website frequently for updates • Some Antimalware apps • Microsoft Security Essential , Norton , Avast, Avira , Kaspersky, AVG • All the companies that we mentioned has either antivirus and internet security How to protect your pc from malware Computer & Internet Security HOSHMAND KAREEM SALIH
  18. 18. • Don't open email messages from unfamiliar senders, or email attachments that you don't recognize • Many viruses are attached to email messages and will spread as soon as you open the attachment. It's best not to open any attachment unless it's something you're expecting • Microsoft Outlook and Windows Mail help block potentially dangerous attachments How to protect your pc from malware Computer & Internet Security HOSHMAND KAREEM SALIH
  19. 19. • Use a pop-up blocker with your Internet browser • Pop-up windows are small browser windows that appear on top of the website you're viewing. Although most are created by advertisers, they can also contain malicious or unsafe code. A pop- up blocker can prevent some or all of these windows from appearing • The Pop-up Blocker feature in Internet Explorer and the other advanced browsers How to protect your pc from malware Computer & Internet Security HOSHMAND KAREEM SALIH
  20. 20. • Keep Windows Updated • Periodically, Microsoft releases special security updates that can help protect your PC. These updates can help prevent viruses and other malware attacks by closing possible security holes • Turn on Windows Update to make sure that Windows receives these updates automatically How to protect your pc from malware Computer & Internet Security HOSHMAND KAREEM SALIH
  21. 21. • Use a firewall • Windows Firewall or any other firewall app can help notify you about suspicious activity if a virus or worm attempts to connect to your PC. It can also block viruses, worms, and hackers from attempting to download potentially harmful apps to your PC How to protect your pc from malware Computer & Internet Security HOSHMAND KAREEM SALIH
  22. 22. • Turn on User Account Control (UAC) • When changes are going to be made to your PC that require administrator-level permission, UAC notifies you and gives you the chance to approve the change. UAC can help keep viruses from making unwanted changes How to protect your pc from malware Computer & Internet Security HOSHMAND KAREEM SALIH
  23. 23. • Clear your Internet cache and your browsing history • Most browsers store info about the websites you visit, and they might also store info that websites might ask you to provide (such as your name and address). While it can be helpful to have these details stored on your PC, there are times when you might want to delete some or all of them—for example, when you're using a public PC and don't want to leave personal info behind • For deleting all the history , privacy and stored information in an easy way use CCleaner app How to protect your pc from malware Computer & Internet Security HOSHMAND KAREEM SALIH
  24. 24. • Use another type of operating system • Because Windows is the most operating system used in the world , the most malwares are made for windows , so using another type of OS like Linux or Mac OS x is better , because malwares for these Operating systems are not too much • Some types of Linux • Ubuntu • Open SUZI • Backtrack • Kali • Red hat How to protect your pc from malware Computer & Internet Security HOSHMAND KAREEM SALIH
  25. 25. •Offensive Security Training and Services • World Class Information Security Training and Penetration Testing Online Training courses HOSHMAND KAREEM SALIH
  26. 26. • We previously talked about these • What is malware • Types of malware • Reasons for writing malware • firewall • Hackers and crackers • How to protect our pc from malwares • offensive-security.com Wrap up! Computer & Internet Security HOSHMAND KAREEM SALIH
  27. 27. • Book • Security Fundamentals – an official course - Microsoft • Windows help center • “How to protect my pc from viruses ?” • Internet • https://www.slideshare.net • Some slides about malwares , hackers , viruses and spywares • Some pictures of malwares (searched in google.com) • YouTube • A part of video in “Troy” movie References Computer & Internet Security HOSHMAND KAREEM SALIH

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