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Autoimmune viruses © Alberto Cammozzo Oct 2005 Autoimmune computer virus October 2005 Alberto Cammozzo mmzz -at- stat.unipd.it 1 Autoimmune viruses © Alberto Cammozzo Oct 2005 Autoimmune biological virus « The immune system is a complicated network of cells and cell components (called molecules) that normally work to defend the body and eliminate infections caused by bacteria, viruses, and other invading microbes If a person has an autoimmune disease, the immune system mistakenly attacks self , targeting the cells, tissues, and organs of a person's own body. » NIH Publication No. 98-427 Understanding Autoimmune Diseases - May 1998 http://www.niaid.nih.gov/publications/autoimmune/autoimmune.htm 2 Autoimmune viruses © Alberto Cammozzo Oct 2005 Antivirus aware computer viruses « Many viruses are able to recognize certain anti-virus software, and respond differently to such software than to programs designed for other purposes. Some viruses go after the databases stored by anti-virus products. Some viruses simply go after anti-virus products, trying to erase them. » David Stang – Fighting Computer Virus Infection through Auto-Immune Responses - Applying Principles of Life to Anti-Virus Technology http://vx.netlux.org/lib/ads01.html 3 Autoimmune viruses © Alberto Cammozzo Oct 2005 Autoimmune computer viruses (AICV) are not new «Biological immune disorders in which host defenses turn against the host and actually cause damage are known as autoimmune diseases . Computer autoimmune disorders parallel their biological counterparts. Recently, a warning (defense mechanism used by computer users) turned out to be a not-so-harmless hoax. The hoax warning stated that certain files were infected by a computer virus. Heeding the warning, unsuspecting computer users removed the affected utility files from their computers' operating systems .» Trudy M. Wassenaar and Martin J. Blaser – Contagion on the Internet – Letter to Emerging Infectious Diseases Journal , March 2002 - National Center for Infectious Diseases http://www.cdc.gov/ncidod/EID/vol8no3/01-0286.htm 4 Autoimmune viruses © Alberto Cammozzo Oct 2005 How an antivirus works ● Each antivirus firm has its own antivirus database file : – containing viruses definitions or fingerprints, – updated when needed (e.g. new virus comes up). ● Antivirus client downloads frequently the updated database file from the antivirus' producer web/ftp servers . Antivirus engine runs on client's PC/server with the updated definitions of viruses from the new database file . Antivirus client will remove or quarantine files which fingerprint is in the updated database file . ● In corporate context there usually are intermediate servers . 5 [ Pobierz całość w formacie PDF ] |
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