Filename manipulation remains one of the simplest yet most effective social engineering vectors. Awareness of double extensions is a foundational component of modern digital literacy and perimeter defense.
: Often, these files are not videos at all. They are scripts or compiled malware designed to steal information, log keystrokes, or install ransomware. 4. Defensive Countermeasures Happy New Year.mp4.mp4
This paper analyzes the security implications of files named with repeating or double extensions, such as Happy New Year.mp4.mp4 or Happy New Year.mp4.exe . This technique leverages default operating system display settings to deceive users into executing malicious code, assuming it is a harmless media file. 2. The Mechanics of the Double Extension Filename manipulation remains one of the simplest yet
Operating systems like Microsoft Windows, by default, hide known file extensions to create a cleaner user interface. Cybercriminals exploit this behavior through a social engineering technique called . Visual Deception When a user receives a file named Happy New Year.mp4.mp4 : The real file extension is the final .mp4 . They are scripts or compiled malware designed to
The user believes they are safely opening a video file, lowering their security vigilance.