What Is Malware? | Malware Explained | What Is Malware And It's Types? | Malware Attack |Simplilearn

In the current technological era, coming

across different computer problems

related to malware and cyber tax is

common.

According to AV test institute, there are

more than one billion malware programs

available.

And new malware programs are detected

regularly.

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In this video, we'll understand what is a

malware program?

Then, we'll see what exactly are viruses

and trojans.

Then, we will see how they operate in a

system.

And then different types of viruses and

trojan,

and how to detect the activity of such

programs.

And lastly, we will see how to prevent

our system from getting infected by such

programs.

Malware is a malicious software that is

programmed to cause damage to a computer.

System network and hardware devices.

Many malicious programs like trojan

viruses worms and bots which cause

damage to the system are known as

malware. Most of the malware programs are

designed to steal information from the

targeted user

or to steal money from the target by

stealing sensitive data.

Let's take a look at the introduction

for two different types of malware virus,

and trojan.

Firstly, let's take a look what exactly

is a virus program.

A computer virus is a type of malicious

program that on execution replicates

itself.

They get attached to different files and

programs, which are termed as host

programs by inserting their code. If the

attachment succeeds, the targeted program

is termed as infected with a computer

virus.

Now, let's take a look at the trojan

horse.

Trojan horse program is a program that

disguises itself as a legitimate program,

but harms the system on installation.

They hide within the attachments and

emails then transfer from one system to

another they create bad doors into a

system to allow the cyber criminal to

steal our information.

Let's take a look how they function

after getting installed into our system.

Firstly, we have virus programs the

computer virus must contain two parts to

infect the system.

First is a surge routine which locates

new files and data that is to be

infected by the virus program.

And the second part is known as the copy

routine, which is necessary for the

program to copy itself into the targeted

file, which is located by the search

routine now let's take a look at the

trojan horse functioning

for trojan horses entryway into our

system is through emails that may look

legitimate, but may have unknown

attachments. And when such files are

downloaded into the device, the trojan

program gets installed and infects the

system.

They also infect the system on the

execution of infected application or the

executable file and attacks the system.

Now, that we understand what virus and

trojans are let's understand different

types of virus androgens.

Let's take a look at different types of

viruses.

The first one is known as the booth

sector virus. This type of virus damages

the booting section of the system by

infecting the master bot record, which is

also known as MBR.

This damages the boot sector section by

targeting the hard disk of the system.

Then we have the macro virus.

Micro virus is a type of virus that gets

embedded into the document related data,

and is executed when the file is opened.

They also are designed to replicate

themselves, and infect the system on a

larger scale.

And lastly, we have the direct action

virus.

This type of virus gets attached to

executable files, which on execution

activates the virus program and infects

the system. Once the infection of the

file is completed, they exit the system

which is also the reason it is known as

a non-resident virus.

Let's take a look at different types of

trojans.

The first type of trojan is the backdoor

trojan.

They are designed to create a backdoor

in the system on execution of an

infected program.

They provide remote access of our system

to the hacker. This way, the cyber

criminal can steal our system data and

may use it for illegal activities. Next,

we have

quick source trojan.

They enter the system by clicking the

random pop-ups which we come across on

the internet.

They attempt a user to give their

personal details for different

transactions or schemes,

which may provide remote access of a

system to the cyber criminal.

And the last trojan type is ransom

trojan.

This type of trojan program after

entering the system blocks the user from

accessing

its own system. And also affects the

system functioning

the cyber criminal demands a ransom from

the targeted user for the removal of the

trojan program from the device.

Now, that we understand some details

regarding viruses and trojan, let's solve

a question.

The question is Jake was denied access

to his system, and he wasn't able to

control the data and information in his

system.

Now,

the actual question is what could be the

reason behind his system's problem?

Option A: macro virus, Option B: ransom

trojan, Option C: backward version.

Give your answers in the comment section.

Now, let's understand how to detect the

activity of viruses and trojan in our

system

to detect virus or trojan activity in a

system, we can refer to the following

points

for viruses. We have

slowing down of the system and frequent

application freeze shows that the

infection of the virus is present in the

system.

Then, we have the viruses can also steal

sensitive data including passwords,

account details,

which may lead to unexpected log out

from the accounts or corruption of the

sensitive data.

And lastly, we have frequent system

crashes due to virus infection which

damages the operating system.

For trojan, we have frequent system

crashes and system also faces slow

reaction time.

Then, we have there are more random

pop-ups from the system which may

indicate trojan activity.

And lastly, we have modification in the

system application and change of the

desktop appearance can be also due to

the infection of a trojan program.

Next, let's take a look at a famous cyber

attack for virus and a trojan horse.

For virus, we have

the my doom virus which was identified

in the ER 2004, which affected over 50

million systems by creating a network of

sending spam emails,

which was to gain backdoor access into

our systems.

Next for the trojan horse, we have the

emote trojan program

which is specifically designed for

financial theft and for stealing bank

related information.

Next, we have few points for how to

prevent virus entry or trojan attack for

a system.

The most basic way of virus protection

is to using antivirus and do regular

viruses can

this will prevent virus entry in the

system, and also having more than one

antivirus provides much better

protectionm

then avoid visiting uncertified websites

can also prevent virus entry into our

systemm

then we have

using regular driver updates and system

updates to prevent virus entry for

trojan. We have using certified softwares

from legal sites to prevent any trojan

activity in our system,

and also avoid clicking random pop-ups

that we often see on the internet

and lastly using antivirus and firewalls

for protection against trojan horses is

a good habit,

Now, that we have reached the end of the

video, let's take a look what we learnt

for the first part. We saw the main

objective of the virus is to harm the

data and information in a system whereas

for the trojan, we have stealing of the

data files and information

effect of viruses is more drastic in

comparison to the trojan horses.

Then we have viruses which are

non-remote programs whereas trojan

horses are remote accessed.

And lastly,

viruses have the ability to replicate

itself to harm multiple files whereas

trojan does not have the

replication ability.

If you have any questions, you can ask

them on the comment section. Thank you

for watching.

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