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The macro virus replaces regular commands with the same name and runs when the command is selected. These malicious macros may start automatically when a document is opened or closed, without the user's knowledge. [2] Once a file containing a macro virus is opened, the virus can infect the system.
Dridex, also known as Bugat and Cridex, is a form of malware that specializes in stealing bank credentials via a system that utilizes macros from Microsoft Word. [5]The targets of this malware are Windows users who open an email attachment in Word or Excel, causing macros to activate and download Dridex, infecting the computer and opening the victim to banking theft.
The Melissa virus is a mass-mailing macro virus released on or around March 26, 1999. It targets Microsoft Word and Outlook -based systems and created considerable network traffic. The virus infects computers via email ; the email is titled "Important Message From," followed by the current username.
When the user opens the document, it appears to be full of gibberish, and includes the phrase "Enable macro if data encoding is incorrect," a social engineering technique. If the user does enable macros, they save and run a binary file that downloads the actual encryption Trojan, which will encrypt all files that match particular extensions ...
Adware is also a problem on the Mac, with software like Genieo, which was released in 2009, inserting ads into webpages and changing users' homepage and search engine. Malware has also been spread on Macs through Microsoft Word macros. MacOS, known for its robust security, has faced evolving challenges regarding malware over time.
In a June 2006 Microsoft report, [2] the company claimed that the tool had removed 16 million instances of malicious software from 5.7 million of 270 million total unique Windows computers since its release in January 2005. The report also stated that, on average, the tool removes malicious software from 1 in every 311 computers on which it runs.
A later variant targeted a Java vulnerability on Mac OS X. The system was infected after the user was redirected to a compromised bogus site, where JavaScript code caused an applet containing an exploit to load. An executable file was saved on the local machine, which was used to download and run malicious code from a remote location.
As of 23 February 2021, Internet security company Malwarebytes has discovered over 29,000 Macs worldwide running their anti-malware software to be infected with Silver Sparrow. [7] Silver Sparrow infected Macs have been found in 153 countries as of February 17, with higher concentrations reported in the US, UK, Canada, France, and Germany ...