computer viruses
DESCRIPTION
Computer Viruses. History. Malicious software – 1970’s Programs distributed over exchange servers speeds spread of viruses Brain sparks term: Virus. Historical Viruses. Brain VirDem Lehigh Chameleon – Polymorphic DAME VCL. More History. CDs make removal difficult Macro viruses - PowerPoint PPT PresentationTRANSCRIPT
Computer Viruses
History
• Malicious software – 1970’s
• Programs distributed over exchange servers speeds spread of viruses
• Brain sparks term: Virus
Historical Viruses
• Brain
• VirDem
• Lehigh
• Chameleon – Polymorphic
• DAME
• VCL
More History
• CDs make removal difficult
• Macro viruses
• Remote control becomes prevalent
• Spread via email
• Downloading and file sharing
Virus Types and Descriptors
• Resident
• Direct Action
• Overwrite
• Boot Sector
• Macro
• Directory
• Encrypted
More Viruses
• Polymorphic
• Multipartite
• File Infector
• Companion
• FAT
• XSSV
• Sentinel
Even More Viruses
• Stealth• Armored• Sparse Infector• Fast and Slow Infector• Worms• Trojan Horses• Logic Bombs• Hoaxes
Anti-Virus
• Searches for known viruses
• Requirements– Bit-level work– Good error handling– Fast, dynamic life cycle
• Also identifies suspicious behavior
• Scans incoming and outgoing behavior
Prevention and Aid
• Techniques– Deletion– Quarantine– Repair
• Polymorphic viruses make detection via dictionary difficult
• Suspicious behavior’s advantages
• Sandboxes and Blueprints
Other Methods
• Education
• Email filtering
• User knowledge
Spyware
• Definition
• Symptoms
• Methods of infection
• Results– Phone home– Remote access
• Zombie attacks
Spyware
• Rootkit– Sony
• Prevention– Anti-spyware programs
• Not always the most effective
– Safe internet practices
Survey
• We surveyed 40 people on the Pace University Campus
• We asked questions related to demographic information and regarding virus preparedness
Male vs. Female
male, 16
female, 24
male
female
Preparedness
yes
yes
yes
yes
yes
no
no
no
no
no
0
5
10
15
20
25
30
35
40
Up to Date Anti-Virus Software
Do not openemails fromstrangers
Readagreements
presented onweb sites
Have computeror networkfirewalled
Do any of theabove
yes
no
Conclusion
• Viruses and Spyware pose an increasing threat
• Prevention methods do not include software alone
• Many methods which are common knowledge to those familiar with computers are not common practice