Video Files & Identity Theft: What You Need To Know

TL;DR

Yes, a video file can contain code that compromises your identity or security. This is usually done through malware hidden inside the video itself, or by tricking you into running software to play it. Be careful where you get videos from and always scan them before opening.

How Videos Can Hide Code

Video files aren’t just pictures; they contain instructions for how those pictures are displayed. Clever attackers can sneak malicious code into these instructions. Here’s how:

• Malware Embedded in the File: The video file itself might be altered to include harmful software (a virus, trojan, etc.). When you open it, the malware runs.
• Codec Issues: Some videos require specific ‘codecs’ (software that decodes the video). Fake or compromised codecs are a common way to deliver malware. You think you’re installing something to watch the video, but you’re actually installing something malicious.
• Phishing Links: A video file name or metadata might contain links to fake websites designed to steal your login details or personal information.

Steps to Protect Yourself

1. Source Matters: Only download videos from trusted sources. Avoid suspicious websites, torrents, and unknown email attachments.
2. Scan Before Opening: Always scan any downloaded video file with an up-to-date antivirus program before opening it. Windows Defender is a good start, but consider other options like Malwarebytes or Bitdefender.

   # Example using Windows Defender (command line)

   MpCmdRun.exe -scan -file "C:pathtoyourvideo.mp4"

3. Be Wary of Codec Requests: If a website asks you to download a specific codec to play a video, be extremely cautious. Research the codec provider before downloading anything. Often, legitimate videos will work with codecs already installed on your system or through common media players like VLC.
4. Keep Your Software Updated: Regularly update your operating system, antivirus software, and web browser. Updates often include security patches that protect against new threats.
5. Use a Reputable Media Player: VLC Media Player is known for its ability to play many formats without needing extra codecs, reducing the risk of installing something malicious. It also has built-in security features. You can download it from https://www.videolan.org/vlc/
6. Check File Extensions: Double-check the file extension before opening. A file named video.mp4.exe is a huge red flag – it’s trying to trick you into running an executable program disguised as a video.
7. Virtual Machines (Advanced): If you absolutely must open a video from an untrusted source, consider doing so in a virtual machine. This isolates the potential malware from your main system.

What to Do if You Think You’ve Been Compromised

• Disconnect: Immediately disconnect your computer from the internet to prevent further damage or data theft.
• Run a Full Scan: Perform a full scan with your antivirus software. Consider using multiple scanners for thoroughness.
• Change Passwords: Change passwords for important accounts (email, banking, social media) as soon as possible.
• Monitor Your Accounts: Keep a close eye on your bank and credit card statements for any unauthorized activity.
• Seek Professional Help: If you’re concerned about the extent of the compromise, consult with a cyber security professional.