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COMPUTER VIRUSES AND ANITVIRUSES TECHNIQUES

COMPUTER VIRUSES AND ANITVIRUSES TECHNIQUES. SEQUENCE OF PRESENTATION. COMPUTER VIRUS. * WHAT IS COMPUTER VIRUS ?. ?. SEQUENCE OF PRESENTATION. COMPUTER VIRUS. * VIRUS (ROGUE SOFTWARE). I. SEQUENCE OF PRESENTATION. COMPUTER VIRUS. * WHO ARE ROGUE PROGRAMMERS ?.

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COMPUTER VIRUSES AND ANITVIRUSES TECHNIQUES

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  1. COMPUTER VIRUSES AND ANITVIRUSES TECHNIQUES

  2. SEQUENCE OF PRESENTATION COMPUTER VIRUS * WHAT IS COMPUTER VIRUS ? ?

  3. SEQUENCE OF PRESENTATION COMPUTER VIRUS * VIRUS (ROGUE SOFTWARE) I

  4. SEQUENCE OF PRESENTATION COMPUTER VIRUS * WHO ARE ROGUE PROGRAMMERS ?

  5. SEQUENCE OF PRESENTATION COMPUTER VIRUS * TYPES OF COMPUTER VIRUS

  6. SEQUENCE OF PRESENTATION COMPUTER VIRUS * WHAT ALL CAN THEY DO ?

  7. SEQUENCE OF PRESENTATION COMPUTER VIRUS * HOW DO THEY INFECT ?

  8. SEQUENCE OF PRESENTATION COMPUTER VIRUS * HOW NOTICE ? V I S R U

  9. SEQUENCE OF PRESENTATION COMPUTER VIRUS * WHAT TO DO ? NO ! VIRUS

  10. SEQUENCE OF PRESENTATION COMPUTER VIRUS * LAST WORD

  11. SEQUENCE OF PRESENTATION COMPUTER VIRUS * CONCLUSION

  12. WHAT IS COMPUTER VIRUS ? COMPUTER VIRUS “ A COMPUTER PROGRAM ABLE TO INFECT OTHER PROGRAMS BY MODIFYING THEM TO INCLUDE A POSSIBLY EVOLVED VERSION OF ITSELF. ”

  13. WHAT IS COMPUTER VIRUS ? COMPUTER VIRUS * BE A SET OF COMPUTER INSTRUCTIONS * BE DELIBERATELY CREATED * DO UNDESIRABLE THINGS (DAMAGES) * PROPAGATE USING HOST PROGRAMS

  14. COMPUTER COMPONENTS COMPUTER VIRUS SOFTWARE ROGUE SOFTWARE LEGITIMATESOFTWARE PRODUCTIVE DESTRUCTIVE

  15. ROGUE SOFTWARE * BUG-WARE - NOT MEANT FOR DESTRUCTION * THE TROJAN HORSE - APPEARS TO BE USEFUL * WORMS - TRAVEL IN NETWORK * REPLICATORS - COPY ITSELF TO EXHAUST DISK * CHAMELEONS - M ISCHIEF

  16. ROGUE ROGUE SOFTWARE SOFTWARE * TIME BOMBS - EXPLODE ON TIME / DATE * LOGIC BOMBS - EXPLODE ON LOGIC * SOFTWARE BOMBS - EXPLODE ON LAUNCH

  17. WHO ARE ROUGE PROGRAMERS ? COMPUTER VIRUS * PSYCHO CASES - FOR FUN - RELEASE ANGER - TAKE REVENGE

  18. WHO ARE ROUGE PROGRAMERS ? COMPUTER VIRUS * PROFIT EARNERS $ $ $ $ $ - VIRUS / ANTIVIRUS MARKET

  19. WHO ARE ROUGE PROGRAMERS ? COMPUTER VIRUS * INFO ATTACKERS - DISRUPT ENEMY’S INFORMATION & NETWORK

  20. TYPES OF COMPUTER VIRUS COMPUTER VIRUS * BOOT / PARTITION INFECTING VIRUS * EXECUTABLE FILE INFECTING VIRUS * MULTI-PART VIRUS * DIRECTORY INFECTING VIRUS RESIDENT NON RESIDENT

  21. WHAT CAN THEY DO ? COMPUTER VIRUS • FORMAT DISK • COPY, RENAME AND DELETE FILES • COPY THEMSELVES WITH NEW CONFIGURATION INFORMATION • MODIFY FILE DATES AND EXTENSIONS • CALL OTHER COMPUTERS TO UPLOAD AND DOWN LOAD FILES

  22. HOW DO THEY DO ? COMPUTER VIRUS • APPENDING • INSERTION • INTERCEPTION • REDIRECTION • REPLACEMENT

  23. HOW DO YOU NOTICE ? COMPUTER VIRUS

  24. HOW DO YOU NOTICE ? COMPUTER VIRUS • COMPUTER OPERATION BECOMES SLUGGISH • PROGRAMS TAKE LONGER TO LOAD • PROGRAMS ACCESS MULTIPLE DISK DRIVES • UNUSUAL AND FREQUENT ACCESS TO DISK • DISK SPACE DECREASES RAPIDLY • BAD DISK SECTORS STEADILY INCREASE • RAM DECREASES SUDDENLY OR STEADILY • COMPUTER HALTS WITH OR WITHOUT FUNNY MESSAGES

  25. HOW DO YOU NOTICE ? COMPUTER VIRUS • PROGRAMS ENCOUNTER ERRORS • PROGRAMS GENERATE UNDOCUMENTED ERRORS • FILES REPLACED WITH GARBAGE • FILES MYSTERIOUSLY DISAPPEAR • FILE ATTRIBUTES AND DATA CHANGE • DATA FILES OR DIRECTORIES OF UNKNOWN ORIGIN APPEAR

  26. WHAT TO DO ? • ANTI VIRUS TECHNIQUES

  27. WHAT TO DO ? COMPUTER ANTI VIRUS • SAFE COMPUTING METHODS • ANTIVIRUS SOFTWARE SYSTEMS • PREVENTION SYSTEM • DETECTION SYSTEM • SURGICAL APPROACH

  28. - BOOT FROM FLOPPY DISK - DISCOURAGE PIRATED SOFTWARE - TAKE BACKUP WHAT TO DO ? COMPUTER ANTI VIRUS SAFE COMPUTING METHODS * YOU MUST

  29. WHAT TO DO ? COMPUTER ANTI VIRUS SAFE COMPUTING METHODS • YOU MAY • USE PRE RUN CHECKUPS • CHANGE FILE ATTRIBUTES • REINITIALIZE SYSTEM • REINSTALL APPLICATIONS • REFORMAT HARD DISK • OBSERVE OPERATION TIMINGS • LOG DISK SPACE • LOG BAD SECTORS

  30. WHAT TO DO ? ANTIVIRUS SOFTWARE SYSTEMS COMPUTER ANTI VIRUS • PREVENTION SYSTEMS • TO STOP VIRUS ATTACKS IN REAL TIME • BLOCK ILLEGAL DISK ACCESS AND PROGRAM LOADING • PASSWORD PROTECTION • SLOW SPEED • UNNECESSARY INTERRUPTS • CAN BE INFECTED BY VIRUS • HEAVY ON RAM

  31. WHAT TO DO ? COMPUTER ANTI VIRUS ANTIVIRUS SOFTWARE SYSTEMS • DETECTION SYSTEMS • LOAD, RUN AND EXIT • CHECK PROGRAM BEFORE EXECUTION • COMPLEMENT PREVENTION SYSTEM • PROGRAM SPECIFIC AND GENERIC

  32. WHAT TO DO ? SOME ANTIVIRUS SOFTWARE COMPUTER ANTI VIRUS • VACCINES • ANTIDOTES • FILE COMPARISON UTILITIES • VIRUS SCANNERS • DISK MAPPERS • MEMORY RESIDENT ANTIVIRUS PROGRAMS

  33. WHAT TO DO ? THE IDEAL ANTIVIRUS SAFETY NET CONSISTS OF AN INTELLIGENT, WELL TESTED AND WELL BALANCED COMBINATION OF SAFE COMPUTING METHODS PLUS VIRUS PREVENTION AND VIRUS DETECTION SYSTEMS

  34. SURGICAL APPROACH • Empty the House - TAKE OUT ALL HOUSE HOLD ITEMS • DISINFECT THE EMPTY HOUSE • CLEAN AND DISINFECT EACH HOUSE HOLD ITEM AND BRING IT BACK ONE BY ONE • START NORMAL LIFE

  35. THE LAST WORD “THE ONLY TRULY SECURE SYSTEM IS ONE THAT IS POWERED OFF, CAST IN A BLOCK OF CONCRETE, AND SEALED IN A LEAD-LINED ROOM WITH ARMED GUARDS AND EVEN THEN I HAVE MY DOUBTS.” E. H. SPAFFORD ASSOCIATE PROFESSOR DEPTT OF COMPUTER SCIENCES PURDUE UNIVERSITY

  36. CONCLUSION“LEARN TO LIVE WITH IT” • SAFE COMPUTING TECHNIQUES • MANAGE SOFTWARE PIRACY • EDUCATE USERS • KEEP ABREAST OF THE LATEST VIRUS AND ANTIVIRUS • REVIEW SITUATION

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