Wm.Twno.B

Risk Level 1: Very Low

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Updated:: February 13, 2007 11:33:27 AM
Type:: Macro

The Twno.B virus originated in Taiwan in 1996. It consists of one macro, AutoExec, which contains code that poses a question to the user in Chinese on the 28 th of the month. If the user answers correctly, CONFIG.SYS, AUTOEXEC.BAT, and COMMAND.COM are deleted on the C: drive. If the user answers incorrectly, all files in the DOS directory and the ET3 directory (if it exists) are deleted.

Antivirus Protection Dates

Initial Rapid Release version December 18, 2000
Latest Rapid Release version December 18, 2000
Initial Daily Certified version December 18, 2000
Latest Daily Certified version December 18, 2000
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: Easy
Removal: Easy

Damage

Damage Level: Low

Distribution

Distribution Level: Low

Technical Details

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Internet Security Threat Report, Volume 16