The document discusses computer viruses and worms. It defines a computer virus as malicious software that spreads between computers and damages data and software. A computer worm is also malware that self-replicates to infect other computers while remaining active on infected systems. The document lists popular viruses like Mydoom and worms like Morris. It provides types of each and compares the key differences between viruses and worms. Finally, it suggests precautions like installing antivirus software and steps to remove viruses and worms like using a scanner in safe mode.

2. Team Members
Gagan H (1NT20CS060)
Hanumantha V
(1NT20CS070)
Syed Sameer pasha
(1NT20CS193)

3. Virus
A computer virus is a type of
malicious software, or malware,
that spreads between computers
and causes damage to data and
software. to data and
software. damage to data and
software

4. How does it Spread??🤔
Computer virus spread through malicious
online downloads, infected e-mail
attachments, or by plugging in infected
hardware like an external flash drive.

5. What Virus do??😨
Some computer viruses are programmed to harm your
computer by damaging programs, deleting files, or
reformatting the hard drive. Others simply replicate
themselves or flood a network with traffic, making it
impossible to perform any Internet activity.

6. Types of Virus
o Macro virus
o File Infectors
o Resident Virus
o Root kit Virus
o Overwrite Virus
o Polymorphic Virus
o System/Boot sector virus

7. Popular Viruses😠
 Mydoom
 Sobig
 Klez
 ILOVEYOU
 CryptoLocker
 Melissa
 Code Red
 Zeus
 StuxNet
 Sasser

8. Worms
A computer worm is a type of malware whose primary
function is to self-replicate and infect other
computers while remaining active on infected
systems.
A computer worm duplicates itself to spread to
uninfected computers. It often does this by
exploiting parts of an Operating System that are
automatic and invisible to the user.

9. How does it Affect??🤔
Worms can modify and delete files, and they can even
inject additional malicious software onto a computer.
Worms can make copies of itself over and over -
depleting system resources such as hard drive space
Or bandwidth by overloading a shared network.

10. Types of Computer Worms🤔
o Email Worms
o File-sharing worms
o Crypto worms
o Internet worms
o Instant messaging worms

11. Popular Worms 🤔
o Morris
o ILOVEYOU
o Nimda
o Code Red
o Melissa
o MSBlast
o Sobig
o Storm Worm
o Michelangelo
o Jerusalem

12. Virus vs Worms
o Type of computer
program
o It has to be executed
o Need human interaction
o Type of malware
o It need not to be
executed
o No need human
interaction

13. Do we have any precautions??🤔
o Install Anti-virus software
o Backup your data
o Avoid clicking anonymous links
o Install hardware based firewall
o Disable Auto run in system
o Scan your downloaded files
o Don’t open untrusted files
o Read license agreement
o Don’t click on pop up ads

14. Steps to remove virus and worms🤔
o Enter safe mode
o Delete temporary files
o Download virus and worms scanner
o Run the scanner and delete affected files
o Reinstall affected files

15. REFERENCES
• PRINICPLES OF INFORMATION SECURITY-MICHAEL
A WHITTMAN,HERBERT J MATHOD
• INTERNET RESOURCES
(GEEKSFORGEEKS,TECHTARGET)