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.

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.

29. Antivirus Rating System.

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