Category: Malware

Type: Virus

Aliases: Sylvia, Holland Girl


This virus is a bit unusual, to say the least. It contains the following message:

Thisprogram is

 by a

Text-Virus V2.1
Send a FUNNY postcard to : Sylvia Verkade,

 Duinzoom 36b,

 3235 CD Rockanje

 The Netherlands.
You might get an ANTIVIRUS program.....

It will display this message when an infected program is executed, but if the above text is tampered with, the following message, (which is stored in an encrypted form) will appear instead:


system halted...$

Some people have a weird sense of humor...


Automatic action

Based on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the detected program or file, or ask you for a desired action.

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Technical Details

Two versions are known, only slightly different - possibly modified to avoid some anti-virus program. When an infected program is run, the virus will seek out up to 5 .COM files to infect. It will search drive C: and the current drive. The three system files, COMMAND.COM, IBMBIO.COM and IBMDOS.COM are not infected. The virus adds 1301 bytes to the beginning of the files it infects (and also 31 bytes to the end), but does no other damage. The girl mentioned above exists, but she says that she has no idea who the author is, although there is a rumor he is her ex-boyfriend.