macro virus where it come from in computer
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macro virus
Posted by: Margaret Rouse
WhatIs.com
Contributor(s): Linda Rosencrance
A macro virus is a computer virus written in the same macro language used for software programs, including Microsoft Excel or word processors such as Microsoft Word. When a macro virus infects a software application, it causes a sequence of actions to begin automatically when the application is opened.
Since a macro virus centers on an application and not an operating system, it typically can infect any computer running any operating system, even those running MacOS and Linux.
How macro viruses work
Macro viruses work by embedding malicious code in the macros that are associated with documents, spreadsheets and other data files, causing the malicious programs to run as soon as the documents are opened. Typically, macro malware is transmitted through phishing emails containing malicious attachments. The macro virus spreads quickly as users share infected documents.
Once an infected macro is executed, it will typically infect every other document on a user's computer. Some macro viruses cause irregularities in text documents, such as inserting or deleting words. Other macro malware accesses email accounts and sends out copies of infected files to all of the users' contacts, who then open and access these files because they come from trusted sources.
Examples of macro viruses
The first macro virus to be spread in the wild through Microsoft Word was Concept, which was discovered in July 1995. The virus was accidentally included on a CD-ROM called "Microsoft Compatibility Test" shipped by Microsoft to hundreds of corporations in August 1995.
Concept spread to computers in infected Word documents with a .doc extension attached to email messages. From there, the virus infected the English version of Word 6.0 or Word 95 documents that had been saved using the command Save As. Concept did not carry out any damaging actions in affected computers; it just displayed a message on screen when it infected a document.
Answer:
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Explanation:
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