virus and antivirus
TRANSCRIPT
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VIRUSES AND
ANTI- VIRUSES
SUBMITTED BY : RISHABH BHARADWAJ
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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
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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)
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FUNCTIONAL ELEMENTS OF A VIRUS
TWO BASIC PARTS :
1.SEARCH ROUTINE
2. “.COM” AND “.EXE” FILES
TOOLS NEEDED FOR WRITING VIRUS
ASSEMBLY LANGUAGE
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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
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ANTIVIRUS
1. DEFINITION
2. SIGNATURE BASED DETECTION
3. HEURISTICS ANALYSIS
4. ROOTKIT DETECTION
5. REALTIME PROTECTION
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EFFECTIVENESS OF ANTIVIRUSES
1. STUDIES IN DECEMBER 2007
2. MAJOR VIRUS SCANNERS
3. NETWORK FIREWALL
4. SPECIALIST TOOLS
5. USAGE AND RISKS
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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
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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.
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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.
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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.
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THANKYOU…!!