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A macro virus can be spread through e-mail attachments, removable media, networks and the Internet, and is notoriously difficult to detect. [1] A common way for a macro virus to infect a computer is by replacing normal macros with a virus. The macro virus replaces regular commands with the same name and runs when the command is selected.
The new Emotet infections were delivered via TrickBot, to computers that were previously infected with TrickBot, and soon began sending malicious spam email messages with macro-laden Microsoft Word and Excel files as payloads. [15] On 3 November 2022, new samples of Emotet emerged attached as a part of XLS files attached within email messages.
As with any common programming language, VBA macros can be created with malicious intent. Using VBA, most of the security features lie in the hands of the user, not the author. The VBA host application options are accessible to the user. The user who runs any document containing VBA macros can preset the software with user preferences.
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.
Microsoft Windows Malicious Software Removal Tool (MSRT) is a freeware second-opinion malware scanner that Microsoft's Windows Update downloads and runs on Windows computers each month, independent of the installed antivirus software. First released on January 13, 2005, [2] MSRT does not offer real-time protection.
ILOVEYOU, sometimes referred to as the Love Bug or Loveletter, was a computer worm that infected over ten million Windows personal computers on and after 5 May 2000. It started spreading as an email message with the subject line "ILOVEYOU" and the attachment "LOVE-LETTER-FOR-YOU.TXT.vbs". [1]
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Fileless malware is a variant of computer related malicious software that exists exclusively as a computer memory-based artifact i.e. in RAM.It does not write any part of its activity to the computer's hard drive, thus increasing its ability to evade antivirus software that incorporate file-based whitelisting, signature detection, hardware verification, pattern-analysis, time-stamping, etc ...