By Ken Dunham

This paintings is a transportable advisor to virus detection and prevention.

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Extra resources for Bigelow's Virus Troubleshooting Pocket Reference

Sample text

Viruses are more likely to be successful in replication efforts when they infect a system without updated antivirus software.  This way, the virus author avoids duplicate infections and increased risk of detection of a virus on the infected system. 2 Virus Characteristics Virus Characteristics Description Armored Example: Whale These viruses utilize advanced stealth techniques, such as encryption and movement of virus code, to avoid detection and disassembly analysis.  See the master boot record classification for more information.

Because new Trojans are often more difficult for traditional antivirus programs to detect, they are likely to enjoy a consistent rise in prevalency In the Wild.  If a dropper places malware into memory only, it is sometimes called an injector.  If the Trojan corrupts or deletes files, restoring from a backup file may be necessary.  Worms may make complete copies of themselves and spread through a network quickly, without parasitically attaching themselves to any existing files or programs.  The Internet Worm created by Robert Morris in 1988 is a host computer worm.

This virus may produce strange cursor behavior at various times and slow program launch.  Simply inserting a PC­formatted disk into a Macintosh computer, with no emulator running, poses no threat of PC boot­sector virus infection.  For example, a Macintosh user at home may have an infected PC­formatted disk that does not infect the Macintosh system but does infect a PC system at work. Page 37 Because of the unique risks, all Macintosh users with emulated environments should be careful to have antivirus solutions for both the Macintosh and PC environments in place on their computers.

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