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Downloading Files Online: Safety Tips to Prevent Falling Prey to Cybercrime

RBL Bank Aug 06, 2025

In today’s hyperconnected world, we share and receive files and links every day, be it through emails, messaging apps, or file-sharing services. While most of these seem safe, some are actually designed to harm your device or steal your data.

Cybercriminals today use clever file names and emotional tricks to fool people, even those who usually stay cautious. One careless click is all it takes for malware to enter your system and cause serious damage. That’s why it’s important to stay alert and understand how these threats work.

The New Face of Online Threats

Cyberattacks have become harder to spot. Hackers no longer rely on obvious tactics. Today, threats often come in the form of everyday content that appears completely harmless. You might receive a file claiming to be a funny video, a news clip, or even a routine work document. In reality, it could be a hidden cyber threat.

These files are commonly shared through:

  • Messaging apps like WhatsApp or Telegram
  • Email attachments from known or unknown senders
  • Cloud links shared via Google Drive, Dropbox, or WeTransfer
  • Social media direct messages

Real examples that have recently surfaced include:

  • “Dance of Hillary Video” – Disguised as an entertaining video clip, often circulated on messaging apps. When opened, it leads to malicious websites or installs malware.
  • “tasks.che” – Appears to be a work-related checklist or project file. However, ‘.che’ is not a common format and may contain hidden executable code or scripts.

These files may seem harmless at first glance, but they can sneakily install malware, steal sensitive information, or allow hackers to gain access to your system. The danger lies in how authentic they appear, making you believe there's no harm in opening them.

Why Are These Files So Dangerous?

Cybercriminals use file extensions that most users don’t look at closely. While .pdf or .docx may seem familiar, files like these should raise immediate red flags:

Common Suspicious Extensions:

  • .exe – executable files that can install programmes
  • .bat – batch files that can run system-level commands
  • .scr – often used to deliver screen savers but also malware
  • .che – an uncommon or unofficial file extension, often used to disguise malware or bypass security filters
  • Renamed video files like .mp4 that are not actually media files

These files can:

  • Run malicious scripts in the background
  • Install spyware to monitor your activity
  • Launch ransomware to lock your system until a ransom is paid
  • Record keystrokes (keyloggers) to steal passwords and banking credentials

The Psychology Behind the Click

Cybercriminals know how to manipulate human emotions. Instead of relying only on technical tricks, they play on your curiosity, fear, or urgency to get you to click without thinking twice.

Cybercriminals rely on emotional triggers that make people more likely to click without thinking.

  • Curiosity: “You won’t believe what’s in this video” or “Secret footage leaked.”
  • Fear: “Your account will be suspended unless you act now.”
  • Urgency: “Only a few hours left—download this file to secure your reward.”
  • FOMO (Fear of Missing Out): “Everyone is watching this. Don’t be left out.”

These triggers override our usual caution, especially when the file is forwarded by a friend or appears to be from a colleague.

How to Protect Yourself: A Practical Checklist

You don’t need to be a cybersecurity expert to stay safe. Just follow these simple yet effective habits:

Do:

  • Verify the sender – If unsure, ask them directly (via a separate channel) whether they sent the file.
  • Check file extensions – Be cautious of anything ending in .exe, .bat, .scr, .che, or double extensions like .pdf.exe.
  • Report suspicious files – If you're part of an organisation, alert your IT or security team.
  • Use antivirus software – Ensure it is up-to-date and performs real-time scanning.
  • Update your devices regularly – Patches often fix vulnerabilities that malware tries to exploit.

Don’t:

  • Download files or click links from unknown or unexpected sources.
  • Assume something is safe just because it came from a friend. Their account could be hacked.
  • Trust emotional or clickbait-style content (e.g., shocking videos, urgent notices).
  • Install apps or files from unofficial websites or forwarded links.

Read More: Stay Safe Online: Simple Tips to Avoid Cybercrime

Spot Something Suspicious? Here’s What to Do

If you’ve received a suspicious file, clicked on a suspicious link, or believe your device or data might be compromised:

If you're an RBL Bank customer:

You can also report cyber frauds to national authorities:

National Cybercrime Reporting Portal

Scammers often mask international calls with Indian numbers or hide their identities. If you receive such a call:

sancharsaathi

Acting quickly can help prevent financial loss and protect your information.

Prevent Auto-Download of Malicious Media

Many messaging apps are set to automatically download incoming files. Disabling this setting can help prevent accidental exposure.

How to turn off auto-download in WhatsApp (Mobile):

1. Go to Settings

2. Tap on Storage and Data

3. Under Media auto-download, turn off downloads for:

  • Photos
  • Audio
  • Videos
  • Documents

This ensures nothing gets downloaded unless you choose to.

Final Thoughts: Awareness Is Your Best Defence

Cybercriminals rely on human error. Their traps are getting more creative, but the best way to fight them is through awareness and caution. Don’t let curiosity, urgency, or humour cloud your judgement. One wrong click can lead to stolen data, locked systems, or financial loss.

Cyber awareness isn’t just for experts, it’s something everyone must practise. By staying alert and informed, we all contribute to a safer digital India.

Disclaimer:
Articles published on the website are merely indicative and suggestive in nature and do not amount to solicitation. The contents do not guarantee the desired returns and/or results. Reader is advised to exercise discretion and consult independent advisors for achieving desired result.

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