Summary
This is a large family of related viruses. Many of them were reported to be in the wild in France in December 1995 - February 1996. Most of the WereWolf viruses are resident infectors of COM and EXE files.
Removal
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First, check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
Technical Details
WereWolf is a stealth virus, but it will only stealth the change in file sizes. Virus is not encrypted and contains the following text:
BEAST
WereWolf avoids infecting the following programs:
CLEAN - McAfee CLEAN AVP - Antiviral Toolkit Pro TB - ThunderByte Antivirus QB - QBasic SCAN - McAfee SCAN COMM - Many communication programs NAV - Norton Antivirus V - Anything starting with a 'V' FINDV - S&S; Findvirus GUARD - S&S; VirusGuard FV - S&S; Findvirus CHKDS - DOS CHKDSK F-PR - F-PROT -D - AVP TSR
Variant:Werewolf.1500.B
This polymorphic variant got widespread distribution in April 1996, as it was attached to a shareware game called 'PackMan', which was available in the upload directory of a major shareware ftp server. This variant has been found in the wild in several countries.
Werewolf.1500.B corrupts data randomly and slowsly while it is being written to the hard drive by any other program. Such changes are very difficult to locate and repair afterwards.
Werewolf.1500.B contains this text:
[WULF]
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