Welcome to the Virus Encyclopedia of Panda Security.
IIS.A is a macro virus that reaches computers in an infected Word document with a DOC extension. From there it infects other Word documents.
IIS.A spreads in an infected Word document through the usual means used by viruses: e-mail messages, computer networks, CD-ROMs, Internet downloads, FTP, floppy disks, etc.
IIS.A has give any clear indication that it has reached or infected a computer.
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