Welcome to the Virus Encyclopedia of Panda Security.
Caligula is a macro virus that infects Word documents, as well as the global template used by the application.
It is very easy to become infected by Caligula, as it can reach computers through any of the means normally used by viruses: CD-ROMs, e-mail messages with infected attachments, Internet downloads, FTP, etc .
Caligula changes the properties of Word documents and attacks the computers with the encryption program PGP (Pretty Good Privacy) installed in order to steal passwords.
An indication that Caligula has infected a computer are the following properties which this virus inserts in the Word documents it infects:
In order to check if the properties of your documents have been changed, access the Properties option in the File menu.
Then, the Summary tab will display the properties of the documents. When this virus has infected the active Word document, this tab will appear as follows:
In addition, when the system date is the 31st day of any month, Caligula displays the following dialog box:
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