SECUR> zip files putting the zap on antivirus products

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Net Happenings - From Educational CyberPlayGround
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Virus writers are turning to .zip compression files to sneak their malware
past virus filters. .zip files are a common format for compressing larger
files or sets of files for storage and transmission. Antivirus firm
MessageLabs reports that the malicious use of .zip files took off in 2003.
Virus writers have long disguised their malware as other file formats, but
avoided .zip since it required special software to install on a target
computer. However, Microsoft's Windows XP offers native support for .zip
files, making them easy targets. .zip files are also important business
tools, making it problematic to filter them. They can also speed up the
spread of mass-mailer worms by shrinking the payload. Some attackers are
compressing gigabytes of data into .zip files, which can crash a machine
when it decompresses the file. No easy technological solution exists for
the dangers of .zip files, leading some to suggest employee education and
best practices to mitigate the threat.
http://www.computerworld.com/securitytopics/security/story/0,10801,89897,00.html




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