Malware is any harmful program or file that can steal, encrypt, or delete sensitive data. Common types of malware include viruses, worms, Trojan horses, and spyware. Malware can perform a variety of malicious functions like altering core computing functions, monitoring users' activity without permission, and stealing or deleting sensitive information. One of the first examples of malware was the Creeper worm created in 1971 as an experiment, which spread from computer to computer without permission while displaying messages. Malware has evolved over time and now includes different types like viruses, worms, ransomware, spyware, and more that can infect devices and compromise users' data and privacy.

1. Malware
(malicious software)

2. Malware (malicious software)
Malware is any program or file that is harmful to a computer user. Types
of malware can include computer viruses, worms, Trojan horses and
spyware. These malicious programs can perform a variety of different
functions such as stealing, encrypting or deleting sensitive data, altering
or hijacking core computing functions and monitoring users' computer
activity without their permission.

3. Malware History
• Creeper Worm – 1970 [ ARPANET] (Networking Based)
Antivirus- Adv. Res Project , Agency Network
(BOB Thomous)- Reaper
• ELK Cloner 1982 - Richard Skrenta (Mac OS)

4. Malware attacks
1. गलत Files Downloading
2. Spam Emails
3. गलत Websites को open करने से
4. Viral Drives use करने से
5. Bluetooth and wi-fi Connectivity से

5. Types of Malware

6. Virus
A virus is the most common type of malware which can execute itself
and spread by infecting other programs or files.

7. Worm
A worm can self-replicate without a host program and typically spreads
without any human interaction or directives from the malware authors.

8. Trojan horse
A Trojan horse is designed to appear as a legitimate program in order to gain
access to a system. Once activated following installation, Trojans can execute their
malicious functions

9. Spyware
Spyware is made to collect information and data on the device user and observe
their activity without their knowledge

10. Ransomeware
Ransomware is designed to infect a user's system and encrypt the data.
Cybercriminals then demand a ransom payment from the victim in exchange for
decrypting the system's data.

11. Rootkit
A rootkit is created to obtain administrator-level access to the victim's system.
Once installed, the program gives threat actors root or privileged access to the
system.

12. Adware
Adware is used to track a user’s browser and download history with the intent to
display pop-up or banner advertisements that lure the user into making a purchase.
For example, an advertiser might use cookies to track the web pages a user
visits to better target advertising

13. Keyloggers
Keyloggers, also called system monitors, are used to see nearly everything a
user does on their computer. This includes emails, opened web-pages,
programs and keystrokes.

14. History
The term malware was first used by computer scientist and security researcher
Yisrael Radai in 1990. However, malware existed long before this. One of the first
known examples of malware was the Creeper virus in 1971, which was created as
an experiment by BBN Technologies engineer Robert Thomas. Creeper was
designed to infect mainframes on ARPANET. While the program did not alter
functions, or steal or delete data, the program moved from one mainframe to
another without permission while displaying a teletype message that read, "I'm the
creeper: Catch me if you can

15. History
Creeper was later altered by computer scientist Ray Tomlinson, who added the
ability to self-replicate to the virus and created the first known computer worm.
The concept of malware took root in the technology industry, and examples of
viruses and worms began to appear on Apple and IBM personal computers in the
early 1980s before becoming popularized following the introduction of the World
Wide Web and the commercial internet in the 1990s.