W32.Dengue

Risk Level 1: Very Low

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Discovered:: April 20, 2000
Updated:: February 13, 2007 11:34:12 AM
Also Known As:: Win32.CTX.10853, DHF
Type:: Virus

W32.Dengue is a complex, slow-infecting, polymorphic Win32 virus that uses Explorer.exe as its main host. Its uses in-memory infection of Explorer.exe, which is always running in Windows NT/2000 and Windows 9x. W32.Dengue is encrypted with more than one polymorphic layer. The size of the W32.Dengue-infected files is always divisible by 101. W32.Dengue also deletes the checksum files of several antivirus programs.

Antivirus Protection Dates

Initial Rapid Release version April 24, 2000
Latest Rapid Release version September 28, 2010 revision 054
Initial Daily Certified version April 24, 2000
Latest Daily Certified version September 28, 2010 revision 036
Initial Weekly Certified release date pending

Click for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

Wild Level: Low
Number of Infections: 0 - 49
Number of Sites: 0 - 2
Geographical Distribution: Low
Threat Containment: Moderate
Removal: Moderate

Damage

Damage Level: Low

Distribution

Distribution Level: Low

Writeup By: Peter Szor

Technical Details

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Internet Security Threat Report, Volume 16