Welcome to the Virus Encyclopedia of Panda Security.
DeDouble is a companion virus that infects files with an EXE extension. This virus makes copies of itself using the name of the EXE file and changing its extension to COM.
It is easy to become infected by DeDouble, as it can reach computers through any of the means normally used by viruses: e-mail messages with infected attachments, CD-ROMs, Internet downloads, FTP, floppy disks, etc.
An indication that DeDouble has infected a computer is the following message, which it displays when a file with an EXE extension created on January 1 of any year is run:
Date:1/1/1980Right Moment to Buy an Antivirus!HLLC.7200 Companion VirusPascal Sample Written for VIROPEDIA 1.0
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