VIRUSES and RELATED THREATS - PowerPoint PPT Presentation

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VIRUSES and RELATED THREATS

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VIRUSES and RELATED THREATS Malicious Programs Virus Adalah program yang mampu menginfeksi program lain dengan cara memodifikasinya. Sifat Alamai Virus Dormant Phase ... – PowerPoint PPT presentation

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Title: VIRUSES and RELATED THREATS


1
VIRUSES and RELATED THREATS
2
Malicious Programs
Malicious Program
Independent
Need Host Programs
Worms
Bacteria
Viruses
Trojan Horses
Logic Bombs
Trapdoors
3
Virus
  • Adalah program yang mampu menginfeksi program
    lain dengan cara memodifikasinya.

4
Sifat Alamai Virus
  • Dormant Phase (idle phase)
  • Propagation Phase (the virus places an identical
    copy of itself into other program or system area
    on disk)
  • Triggering Phase (The Virus Activated to perform
    the function)
  • Execution Phase (The function is perform)

5
Struktur Virus
  • Algoritma virus
  • Program V
  • goto main
  • 1234567
  • subroutin infect-executable-file
  • loop
  • fileget-random-executable-file
  • if(first-line-of-file1234567)
  • then goto loop
  • else prepend V to file
  • subroutin do-damage
  • whatever damage to be done
  • subroutin trigger-pulled
  • return true if some condition holds
  • Main main-program
  • infect-executable
  • if trigger-pulled then do-damage
  • goto next
  • Next

6
Proses Infeksi
CV
P2
P1
P2
CV
CV
P1
P1
P2
7
Jenis-Jenis Virus
  • Parasitic Virus (tradisional and still most
    common form)
  • Memory-resident Virus (lodges in main memory)
  • Boot Sector Virus (Infect a master boot record
    (MBR) and spreads when a system is booted)
  • Stealth Virus (a Form a Virus explicite design to
    hide itself from detection by antivirus software)
  • Polymorphics (A mutates with every infection,
    making detection by signature of the virus
    imposible

8
Macro Virus
  • A Macro virus is platform independent
  • Infect document, not executable portion of code
  • Easy spread most by electronic mail

9
Antivirus Approach
  • Solusi pertama untuk mencegah virus menempatkan
    dirinya pada sistem.
  • Langkah-langkahnya
  • Detection
  • Identification
  • Removal
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