Security threats explained
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This document discusses malware, antivirus software, and firewalls. It defines malware as malicious software like viruses, worms, trojans, adware and spyware that can damage computers. It describes common types of malware and how they infect devices. It then explains how antivirus software works using techniques like signature-based detection, heuristics, rootkit detection and real-time protection to identify and remove malware. Finally, it defines firewalls as systems that block unauthorized network access and outlines types like hardware/software firewalls as well as how they function using methods such as packet filtering, application inspection and proxy servers.
Security threats explained
- 2. Ashish Chavan Abhijeet Karve Tejas Wadke Omkar Shelar Snehal Patel
- 3. # Malware # Antivirus # FireWall
- 5. What are Malware's ? What are its types ? What Malware can do ? How to prevent Malwares ?
- 6. What are Malwares ? "Malware" is short for malicious software and used as a single term to refer to virus, spy ware, worm etc. Malware is designed to cause damage to a stand alone computer or a networked pc. So wherever a malware term is used it means a program which is designed to damage your computer it may be a virus, worm or Trojan.
- 7. What are its types ? Virus Worms Trojans Adware Spywares
- 8. Virus: A virus is a piece of code(malicious code) that is usually made to harm software or the OS(operating system). They can infect a computer and can spread through the network. Some are so powerful that they can even damage the hardware of the system!!!!!
- 9. Worms Require any host to spread the can multiply themselves, infect files, attach themselves to mails, the can spread in a Network . They are big problem to an open network.
- 10. Trojans The most common of all malware's. Main intention is control victims PC them. Ones infected the attacker have full control of your PC. Intended to steal confidential data.
- 11. Adwares Used for advertising a product. They might contain harmful virus or spying software. Can automatically get downloaded to your system while and can be viewed through pop-up windows. Adwares are used by companies for marketing purpose.
- 12. Spyware Collect information about users, their computer or browsing habits tracks each and everything that victim does. Can download other malicious programs and install them. Spy’s the host computer.
- 13. What Malware can do ? A malware can steal your credentials. They can steal your credit card details. They can control your PC. They can look through your webcams. They can harm your hardware and software.
- 14. How to prevent Malware ?
- 15. Keep Your Windows updated :
- 16. Use a good Firewall : What firewall basically do is that is monitor's the traffic that is coming to your system and blocks the malicious traffic and allows the clean. There are basically two type's of firewall Software Firewall and Hardware Firewall. But for home use it is better to stick with software.
- 17. Use Antivirus : Antivirus are the software which are responsible to protect your PC's from viruses and all other threads. Antivirus software is used to prevent, detect, and remove malware and other Computer viruses.
- 18. Run suspicious files in Sandbox Sandbox is an isolated environment in your system in which you can run and install programs without making any changes in your system. Here is a image that explain 's it well.
- 19. Common Sense : This is what you can't find on any website or any file-hosting server nither at any shop. Think you find a videao on youtube that about let's say Bitcoin hacker with comment disabled or enable or whatever. You downloaded it runed it and got infected. Don't you have thought that this is impossible. People infect themselves by using Facebook hacker, G mail hacker, etc without thinking for a minute. I the can hack Facebook , G-mail password means that they have access to the database these high security website.
- 21. Antivirus What is an Antivirus ? What Antivirus do ? What are its types and how do they works ? Antivirus Rating System.
- 22. What is an Antivirus ? Antivirus software identifies, prevents, and removes malware from a computer system. Malware is any number of viruses and software bits that intend to harm the computer or steal information, such as viruses, adware, rootkits, backdoors, hijackers, keyloggers, spyware, trojans, and worms.
- 23. What Antivirus do ?
- 24. What are its types and how do they work ? Signature Based Detection Heuristics Rootkit Detection Real Time Protection
- 25. Signature Based Detection : Nearly all antivirus software uses signature-based detection as part of its virus detection process. Each virus has a digital signature; a code that causes the virus to perform the functions it was designed to perform. On a regular schedule, or at the user’s instruction, antivirus software downloads an updated database of known virus signatures. The antivirus software can then scan each file on the computer’s hardware and memory and compare the entire file, as well as small sections of each file, against the virus signature database
- 26. Heuristics : To help protect computers against new and unknown malware, heuristic detection algorithms were created. Heuristic methods allow antivirus software to detect variants of existing malware and new, never before seen malware. Heuristics use virus signature databases to find viruses, but do not require an exact match to identify a virus. Heuristic detection algorithms scan files for random combinations of signatures to detect malware.
- 27. Rootkit Detection : Rootkits can alter the operating system of a computer to change how it works and even alter antivirus software itself to make it inoperable. In some extreme cases, rootkits can destroy an operating system, making it completely unrecoverable.
- 28. Real Time Protection : Most antivirus software provides real-time protection, often under any number of clever synonyms such as resident shield, background guard, auto-pilot, and so on. In this method the antivirus software detects malwares by their behaviour.
- 31. Firewall
- 32. Firewall What is Firewall ? Why should I use Firewall ? What are its types ? How do they work ?
- 33. What is Firewall ? A firewall is a system designed to prevent unauthorized access to or from a private network. Firewalls can be implemented in both hardware and software, or a combination of both. Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets.
- 34. Why should I use Firewall ? Firewall allows the user to monitor the inbound and outbound traffic in the network. I stops intruders form accessing your system or network. It also have a set of rules to prevent the attacks on the system. All messages entering or leaving the intranet pass through the firewall, which examines each message and blocks those that do not meet the specified security criteria.
- 35. What are its types : Hardware Firewall Software Firewall
- 36. Hardware Firewall Hardware firewall are a stand-alone product which are available as a whole but in the recent years they are integrated in Routers. Hardware firewall are very effective and easy to setup. And they are not dependent on the system resources for their functionality.
- 37. Software Firewall : Software Firewall are most suited for personal use. They can be easily downloaded and install. They come for both advanced and basic users. Software Firewall are usually cheap and mostly free. The main drawback is that the consume system resources for their functionality and slow down the host system.
- 38. How do they work ? There are many ways in which Firewall works namely : Packet Filter Application Layer Circuit-level Gateway Proxy Server
- 39. Packet Filter Firewall These firewalls are the simplest of firewalls, and only allow information packets to pass through the firewall if the packet matches a specific set of rules. A user can define his or her own rules, but these software packages often come with a list of default rules already provided. Within this type of firewall, there are stateless firewalls and stateful firewalls.
- 40. Application Layer Firewall Application layer firewalls are the most powerful firewalls, but add delay to network traffic. These firewalls inspect all packets for specific protocols, such as FTP and browser traffic. Each packet is deeply inspected for content that does not match the header information. Because of this, application layer firewalls are often effective at restricting or completely blocking the spread of worms and trojans.
- 41. Circuit-level Gateway Circuit level gateways are deployed at the session layer of the OSI model and they monitor sessions like TCP 3 way handshake to see whether a requested connection is legitimate or not. Major Screening happens before the Connection is Established.
- 42. Proxy Server Proxy servers act as a firewall in that they inspect incoming packets for specific applications and block all other requests. They act as gateway monitors between the computer and the Internet connection and makes connection decisions for the user. This type of firewall can make accessing a computer more difficult from an external network, such as the Internet.
- 43. Next Generation Firewall (NGFW) A class of firewalls designed to filter network and Internet traffic based upon the applications or traffic types using specific ports. The application-specific granular security policies provided by Next Generation Firewalls help them detect application-specific attacks, giving them the potential to catch more malicious activity than more traditional firewalls.
- 44. Thank You Created by : Abhijeet Karve Designed by : Tejas Wadke