Welcome to the Virus Encyclopedia of Panda Security.
Tristate.C is a macro virus that adds the text <–1nternal–> Triplicate v0.21 /1nternal in infected to the Word documents it infects.
In addition, it infects Word documents (files with a DOC extension), Excel spreadsheets (files with an XLS extension) and PowerPoint presentations (files with a PPT extension).
Tristate.C does not spread using its own means, but it infects other files. It reaches computers when these infected files are distributed, which can enter computers through any of the typical means of tranmission, which include, among others, floppy disks, e-mail messages with attached files, Internet downloads, FTP, IRC channels, peer-to-peer file sharing programs (P2P), etc.
Tristate.C is easy to recognize once it has infected a computer, as it inserts the following text in the Word documents it infects:
<–1nternal–> Triplicate v0.21 /1nternal
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