Welcome to the Virus Encyclopedia of Panda Security.
Chack.A is a macro virus that affects Word 97 documents, as well as the global template used by this application.
Chack.A uses the usual means of infection used by macro viruses. Firstly, it infects the global template. Then, it infects all the documents opened, closed or saved in the affected computer.
In addition, Chack.A disables certain Word options and, on Fridays it displays a message on screen when the user of the affected computer closes the Word program.
Chack.A is very easy to identify, as every Friday, if the user of the affected computer uses Word, the virus displays a message when the program is closed. This message consists of an image and a checkbox with two buttons.
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