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- Discovered:
- January 27, 1999
- Updated:
- February 13, 2007 11:35:50 AM
- Also Known As:
- Trojan.Happy99, I-Worm.Happy, W32.Ska, Happy00
- Type:
- Worm
- Systems Affected:
- Windows 3.x, Windows 95, Windows 98, Windows Me
- CVE References:
- CVE-1999-0668
When executed, the infected program opens a window entitled "Happy New Year 1999 !!" and shows a fireworks display to disguise its installation. This worm sends itself to other users when the infected computer is online.
The following error messages can be symptoms of Happy99.Worm:
"MSIMN caused an invalid page fault in module Kernel32.dll"
"MSIMN caused an invalid page fault in module unknown"
"Explorer caused an invalid page fault in module Mailnews.dll at 014f:62060a0f"
"Outlook caused an Invalid Page Fault in module Unknown"
"MSIMN caused an invalid page fault in module Inetcomm.dll"
For additional information on these errors, see the Microsoft Knowledge Base article OLEXP: Error Message: "Invalid Page Fault in Kernel32.dll" with Happy99.exe Virus, Article ID: Q221486
Antivirus Protection Dates
- Initial Rapid Release version January 28, 1999
- Latest Rapid Release version September 28, 2010 revision 054
- Initial Daily Certified version January 28, 1999
- Latest Daily Certified version September 28, 2010 revision 036
- Initial Weekly Certified release date January 28, 1999
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Threat Assessment
Wild
- Wild Level: Low
- Number of Infections: More than 1000
- Number of Sites: More than 10
- Geographical Distribution: High
- Threat Containment: Easy
- Removal: Moderate
Damage
- Damage Level: Low
Distribution
- Distribution Level: Medium
Writeup By: Raul Elnitiarta
