Is that Windows Update Really Ransomware?

This is one of the sneakiest cybercrime tactics yet. You’re at your PC working when you see a Windows update prompt. Since you want to keep your device safe, you take care of it quickly, but when you install what you think is a legitimate update, you immediately get infected with ransomware.

This tricky new Cybersecurity threat can quickly turn into a nightmare.

We often compare cybercrime to a game of ‘Whack-Mole’, and as fast as you close off one avenue of attack, they devise new ways to infiltrate your system. This new mole that just popped up is very dangerous. They encrypt valuable data, leaving victims with difficult choices. Once ransomware infects your system, your PC (and possibly your entire network) is rendered useless. Your choices: either pay a ransom or get someone to remove the malware, wipe the infected devices, and reinstall the data from your secure backup system (if you have one!).

This new variant that has emerged recently is the ‘Big Head’ ransomware. It adds a new layer of deception by disguising itself as a Windows update. Let’s explore the ins and outs of Big Head ransomware, including its deceptive tactics. We will show you the protective measures you can take to keep yourself from falling victim to such attacks.

What is the big head ransomware?

Everybody should know what standard Ransomware is by now, and what it does: Once an untrained user clicks on a malicious link or attachment in an email, the system locks up and encrypts your data. This renders them inaccessible to the victim until a ransom is paid to the attacker. In the case of Big Head ransomware, the attackers have taken their tactics to the next level. The attack masquerades as a Windows update, a familiar alert that users have come to trust implicitly.

These fake Windows update alerts look authentic and convincing, but they are designed to trick users, who think that their computer is undergoing a legitimate Windows update. The message may appear in a pop-up window or as a notification.

This deception is deeper than previous tactics, as the ransomware uses a forged Microsoft digital signature which makes the fake update appear more authentic. This adds an extra layer of credibility to the malicious message and makes it even more challenging for users to discern its true nature.

Once the user unknowingly downloads and executes the update, the ransomware rapidly floods their system. From there, the ransomware proceeds to encrypt the victim's files. Victims see a message demanding a ransom payment in exchange for the decryption key.

By 2031, it’s expected a ransomware attack will occur every 2 seconds.

How to Protect Yourself from Big Head Ransomware & Similar Threats

The sophistication level in cyber threats is growing exponentially – just as Cybersecurity has become more sophisticated. Crooks are exploring the uses of ChatGPT. It's crucial to take proactive steps to protect your data and systems. Here are some strategies to safeguard yourself from ransomware attacks like Big Head.

Keep Software and Systems Updated!

Part of the cure for fake updates are real updates. Updating your computer is always a best practice for security. It can get tricky since Big Head ransomware leverages the appearance of Windows updates.

One way to be sure you’re installing a real update is to automate. Automate your Windows updates through your device or an IT services provider (like us). This Improves your chances of spotting a fake that pops up unexpectedly.

Verify the Authenticity of Update

File this in the ‘DUH!’ folder. Before installing any software update, verify its authenticity. Genuine Windows updates will come directly from Microsoft's official website. Or through your IT service provider or Windows Update settings. Be cautious of unsolicited update notifications. Especially those received via email or from unfamiliar sources.

Backup Your Data

This should be done already. Regularly back up your important files. Use an external storage device AND a secure cloud backup service. In the event of a ransomware attack, having backup copies is vital. Backups of your data can allow you to restore your files without paying a ransom.

Deploy Robust Security Software

Install reputable antivirus and anti-malware software on your computer. These programs can help detect and block ransomware threats. This helps prevent them infiltrating your system.

Educate Yourself and Others

Don’t just count on your IT team to stay informed about the latest ransomware threats and tactics. You need to educate yourself and your colleagues or family members as well. Discuss the dangers of clicking on suspicious links or downloading attachments from unknown sources.

Use Email Security Measures

Phishing emails are the predominate vehicle for Ransomware attacks, so have in place robust email security measures. Be cautious about opening email attachments or clicking on links. Watch out for emails from unknown senders.

Enable Firewall and Network Security

Activate your computer's firewall. Use network security solutions to prevent unauthorized access to your network and devices.

Disable Auto-Run Features

This is a key defense. Configure your computer to disable auto-run functionality for external drives. This can help prevent ransomware from spreading through infected USB drives.

Be Wary of Pop-Up Alerts

Microsoft and other reputable software developers do not use surprise pop-ups for their alerts. Exercise caution when encountering any and all pop-up alerts. Especially those that ask you to download or install software. Verify the legitimacy of such alerts before taking any action.

Maintain System Vigilance

Keep an eye on your computer's performance and any unusual activity. If you notice anything suspicious, investigate immediately. Suspicious PC activity can be:

Unexpected system slowdowns

File changes

Missing files or folders

Your PC’s processor “whirring” when you’re not doing anything

Have an Incident Response Plan (IRP)

In the unfortunate event of a ransomware attack, have a response plan in place, which should be part of your larger Backup & Disaster Recovery plan. Know how to disconnect from the network. Report the incident to your IT department or a Cybersecurity professional. Avoid paying the ransom if possible.

How secure is your network?

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