Virus and Antivirus

1. VIRUSES
AND
ANTI- VIRUSES
SUBMITTED BY : RISHABH BHARADWAJ

2. VIRUS
1. DEFINITION- WHAT EXACTLY IS A VIRUS?
2. TYPES OF VIRUSES :
1. FILE OR PROGRAM VIRUSES
2. BOOT SECTOR VIRUSES
3. MULTIPARTITE VIRUSES
4. STEALTH VIRUSES
5. POLYMORPHIC VIRUSES
6. MACRO VIRUSES

3. TOP 5 DESTRUCTIVE AND DANGEROUS VIRUSES
1. I LOVE YOU VIRUS (2000)
2. CODE RED VIRUS (2001)
3. SAPPHIRE (2003)
4. SASSER AND NETSKY (PRESENT)
5. STORMWORM NUWAR VIRUS (SINCE 2007 TO PRESENT)

4. FUNCTIONAL ELEMENTS OF A VIRUS
TWO BASIC PARTS :
1.SEARCH ROUTINE
2. “.COM” AND “.EXE” FILES
TOOLS NEEDED FOR WRITING VIRUS
ASSEMBLY LANGUAGE

5. VIRUSES - IN DETAIL
1. FILE OR PROGRAM VIRUSES
2. SIMPLE COM FILE INFECTOR
3. AN OUTLINE FOR A VIRUS – ITS TYPES :
1. AN EXECUTABLE VIRUS
2. BOOT SECTOR VIRUS
3. MULTIPARTITE VIRUSES
4. STEALTH VIRUSES
5. POLYMORPHIC VIRUSES
6. MACRO VIRUSES

6. ANTIVIRUS
1. DEFINITION
2. SIGNATURE BASED DETECTION
3. HEURISTICS ANALYSIS
4. ROOTKIT DETECTION
5. REALTIME PROTECTION

7. EFFECTIVENESS OF ANTIVIRUSES
1. STUDIES IN DECEMBER 2007
2. MAJOR VIRUS SCANNERS
3. NETWORK FIREWALL
4. SPECIALIST TOOLS
5. USAGE AND RISKS

8. DRAWBACKS
1. IMPAIRS COMPUTER’S PERFORMANCE
2. LULLED INTO A FALSE SENSE OF SECURITY
3. ON EMPLOYING HEURISTIC APPROACH, IT MUST BE
FINE TUNED
4. RUNS AT THE HIGHLY TRUSTED KERNEL LEVEL, THUS
CREATING A POTENTIAL AVENUE OF ATTACK
5. VARIOUS METHODS TO IDENTIFY MALWARE

9. NEW VIRUSES
1. ANTIVIRUS ARE NOT ALWAYS EFFECTIVE.
2. ARE PRETESTED BY THE VIRUS DESIGNERS
3. RANSOMWARE – USE POLYMORPHIC CODE TO AVOID
DETECTION
4. RESULT IN DAMAGED FILES.
5. FIRMWARE ISSUES – REQUIRE THE BIOS CHIP.

10. PROBLEMS CAUSED BY FALSE POSITIVE
1. DEFINATION OF "FALSE POSITIVE“.
2. A FALSE POSITIVE HAS ADVERSE EFFECT ON OPERATING
SYSTEM.
3. BAD CONDITION OCCUR FROM FAULTY VIRUSES IN PAST
YEAR.
4. PROBLEMS GENERATED DUE TO CONSCIENTIOUS ANTIVIRUS
IN YEAR 2010.
5. WINDOWS 7 DAMAGED DUE TO FAULTY UPDATE.

11. CONCLUSION
1. COMPUTER VIRUSES ARE NOT EVIL AND THAT PROGRAMMERS
HAVE A RIGHT TO CREATE THEM.
2. CARE SHOULD BE TAKEN ON CREATING A VIRUS, ELSE ONE CAN
WIPE OUT ONE’S OWN SYSTEM.
3. IT IS NECESSARY TO HAVE A DEEP KNOWLEDGE OF THE WAY IN
WHICH DIFFERENT VIRUSES EXPLOITS OUR SYSTEMS WEAKNESS.
4. IT IS ALSO IMPOSSIBLE TO CREATE ANTIVIRUS AGAINST A
PARTICULAR VIRUS.

12. THANKYOU…!!