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Working of Excel Macro Viruses

It did not take long after the first Word Macro virus before the first Excel virus appeared XM/Laroux.A. On the one hand sensational, because never before was there a virus able to infect a spreadsheet. On the other hand, this was a development which was to be expected, as the techniques necessary to create viruses like this are the same.

Similar to MS Word, Excel macro viruses can use the following for their actions.

Macro viruses for Excel pose a bigger threat to the community, because the effects can be dangerous. Imagine that a macro virus for Excel multiplies a certain cell by a factor 10 or changes the formula. Spreadsheets are usually big so these kind of anomalies are not recognized easily.