Welcome to the Virus Encyclopedia of Panda Security.
Yawn.A is a macro virus that reaches computers in an infected Excel 97 spreadsheet (file with an XLS extension). Yawn.A can then infect other files when the Excel 97 window has been opened.
The only objective of Yawn.A is to spread its infection.
Yawn.A does not give any clear indication that it has reached or infected a computer.
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