Malicious code is the term used to describe any code in any part of a software system or script that is intended to cause undesired effects, security breaches or damage to a system. Malicious code is an application security threat that cannot be efficiently controlled by conventional antivirus software alone.

1. MALICIOUS CODE
SPREDING AWARENESS HARMFUL SOFTWARE . . .
MANISH KUMAR SHARMA

2. WHAT IS MALICIOUS CODE
 Any harmful software
 Steals information, ruin computers
 Different types of malware spread differently

3. TYPES OF MALWARE
a. COMPUTER VIRUSES
b. WORMS
c. TROJAN HORSES
d. RANSOMWARE
e. SPAM
f. ADWARE
g. SPYWARE

4. COMUTER VIRUSES
 Ability to replicate
Attach to programs
can Can’t
effect executable files effect hardware
Infact disks and records Infact write protected
(CD-ROM)
Infact email attechments noness

5. TYPES OF COMPUTER VIRUSES
COMPUTER
VIRUSES
BOOT
VIRUSES

6. categories of viruses
1. Boot sector viruses
 Infect boot sector of system
 Become resident
 Activate while booting machine
2. File virus :
 infect program files
 Activates when program is run

7. How Viruses Attach
Appended virus
Original program
Virus
code
Virus code
Original program

8. How virus attach
Virus that surround the program
Virus code Original
program
Virus code (part 1)
Original program
Virus- code( part 2)

9. worms
 consume memory and overload servers
 Steal data , delete files ,create botnets
self-replicate spread independently

10. Trojan Horse
 Useful or normal appearing programs
 Offers remote access to malicious parties
 Access information , steal data , modify etc …

11. ransomware
 Restrict computer access
 Encrypts files on hard disk or computer system
 Demands ransom for access regain

12. Virus v/s. worms
 Virus require interaction whereas worm act on there
own.
 Viruses has to reply on users transferring to infect files
/programs while worm can use a network to replicate
itself.
 Speed of worm is more then viruses