Watch out for ransomware pretending to be a Windows update

Imagine you’re working on your PC or laptop and see a Windows update prompt. Instead of ignoring it, you act. After all, you want to ensure your device is safe. But when you install what you think is a legitimate update, you’re infected with ransomware.

That’s the nightmare caused by an emerging cybersecurity threat.

Cybercriminals are constantly devising new ways to infiltrate systems. They encrypt valuable data, leaving victims with difficult choices. Once ransomware infects your system, your PC is pretty useless. You either have to pay a ransom or get someone to remove the malware. As well as install a backup (if you have one!).

One such variant that has emerged recently is the "Big Head" ransomware. It adds a new layer of deception by disguising itself as a Windows update. In this article, Jonathan Cundliffe, Managing Director of J700 Group a Cyber Security and IT Support provider based in Lancashire explores the ins and outs of Big Head ransomware. Including its deceptive tactics. We will help you to protect you business from falling victim to such attacks.

The Big Head Ransomware Deception

Ransomware attacks have long been infamous for their ability to encrypt files. 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.

Big Head ransomware presents victims with a convincing and fake Windows update alert. Attackers design this fake alert to trick users. They think that their computer is undergoing a legitimate Windows update. The message may appear in a pop-up window or as a notification.

The deception goes even further. The ransomware uses a forged Microsoft digital signature. This 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.

The attack fools the victim into thinking it’s a legitimate Windows update. They then unknowingly download and execute the ransomware onto 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.

Protect Your business from Big Head Ransomware and Similar Threats

Cyber threats are becoming more sophisticated. It’s not just the good guys 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

This one is tricky. Because updating your computer is a best practice for security. Yet, 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 provider (like J700 Group). This increases the chances of spotting a fake that pops up unexpectedly.

Verify the Authenticity of Update

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

Regularly back up your important files. Use an external storage device or 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.

Use Strong 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 from infiltrating your system.

Educate Yourself and your team

Stay informed about the latest ransomware threats and tactics. Educate yourself and your colleagues and family members. Discuss the dangers of clicking on suspicious links. As well as downloading attachments from unknown sources.

Use Email Security Measures

Ransomware often spreads through phishing emails. Put 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 unauthorised access to your network and devices.

Disable Auto-Run Features

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

Exercise caution when encountering pop-up alerts. Especially those that ask you to download or install software. Verify the legitimacy of such alerts before taking any action.

Keep an Eye on Your System

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 a Response Plan

In the unfortunate event of a ransomware attack:

• Have a response plan in place. 
• Know how to disconnect from the network.
• Report the incident to your IT department or a cybersecurity professional.
• Avoid paying the ransom if possible.

Need a Cybersecurity Audit?

Don’t leave unknown threats lurking in your system. A cybersecurity review and audit can shed light on your system vulnerabilities. It's an important proactive measure to ensure network security.

Please contact Angelina or Deon on 0333 7721 700 or email [email protected] for more information or to schedule a cybersecurity review.

About  J700 Group Limited

J700 Group provide effective IT support and services that enable your business to have secure, responsive and reliable information technology, keeping it running smoothly 24/7.  Above this though, we are a family run company who truly care about our customer service and the business relationships we develop.

J700 Group are a Lancashire-based, family-run, professional and responsive, Managed Solutions Provider helping Businesses, to utilise Innovative IT Consultancy Services, Cloud Solutions, Cyber Security, Microsoft 365, Telecoms, Web Design and SEO solutions to propel their organisation to the next level and beyond.

As an experienced IT Support Provider, helping businesses across Lancashire & Manchester, if you need any assistance with your IT including IT Hardware, a Disaster Recovery Policy or Managed Backup Solutions please get in touch with one of our team.

Where to find us: Prinny Mill Business Centre, 68 Blackburn Road, Haslingden, Lancashire, BB4 5HL.