Beware of ransomware masquerading as Windows updates

Imagine you're working on your PC and you see a Windows update prompt. Instead of ignoring it, you take action. After all, you want your device to be safe. But when you install what you think is a legitimate update, you get infected with ransomware.    

It's the nightmare of a new cybersecurity threat.    

Cybercriminals are constantly coming up with new ways to infiltrate systems. They encrypt valuable data, leaving victims with difficult choices. Once ransomware has infected your system, your PC is virtually unusable. You must either pay a ransom or ask someone to remove the malware, and install a backup (if you have one!).    

One 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, we'll explore the ins and outs of Big Head ransomware, including its deceptive tactics. We'll also look at how you can protect yourself against this type of attack.

The Big Head Ransomware Deception

Ransomware attacks have long been infamous for their ability to encrypt files. They render them inaccessible to the victim until a ransom is paid to the attacker. In the case of Big Head ransomware, the attackers have taken things to the next level. The attack masquerades as a Windows update.  

The Big Head ransomware presents victims with a convincing fake Windows update alert. Attackers craft this fake alert to trick users into thinking their computer is undergoing a legitimate Windows update. The message can 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, making it even harder for users to discern its true nature.

The attack tricks the victim into believing it's a legitimate Windows update. They then unknowingly download the ransomware and execute it on their system. From there, the ransomware proceeds to encrypt the victim's files. Victims receive a message demanding a ransom payment in exchange for the decryption key.

By 2031, a ransomware attack is expected to occur every two seconds.

Protect yourself against Big Head ransomware and similar threats

Cyberthreats are becoming increasingly sophisticated. It's not just well-intentioned individuals who are exploring the uses of ChatGPT. It's essential to take proactive steps to protect your data and systems. Here are some strategies to guard against ransomware attacks like Big Head.

Keep software and systems up to date

This is a tricky question. Keeping your computer up-to-date is a security best practice. However, Big Head ransomware exploits the appearance of Windows updates. To ensure you're installing a genuine update, you can automate it. Automate your Windows updates through your device or a software vendor (like us). This increases your chances of spotting a fake update that appears unexpectedly.

Check the authenticity of the update  

Before installing a software update, verify its authenticity. Genuine Windows updates come directly from the official Microsoft website, your IT service provider, or your Windows Update settings. Be wary of unsolicited update notifications, especially those received via email or from unknown sources.

Back up your data  

Back up your important files regularly. Use an external storage device or a secure cloud backup service. In the event of a ransomware attack, it's essential to have backup copies. Backing up your data can allow you to restore your files without paying a ransom. Use strong security software Install good quality antivirus and anti-malware software on your computer. These programs can help detect and block ransomware threats, preventing them from infiltrating your system.

Inform yourself and inform others

Stay informed about the latest ransomware threats and tactics. Educate yourself, your colleagues, and your family members. Explain to them that it's dangerous to click on suspicious links and download attachments from unknown sources.

Use email security measures  

Ransomware is often spread through phishing emails. Implement strong email security measures. Be careful when opening attachments or clicking on links. Be wary of emails from unknown senders.  

Enable firewall and network security

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

Disable autorun features  

Configure your computer to disable the autorun feature for external drives. This helps prevent ransomware from spreading through infected USB drives.

Beware of pop-up alerts  

Be careful when encountering pop-ups, especially those asking you to download or install software. Check the legitimacy of these alerts before acting.  

Monitor your system  

Monitor your computer's performance and any unusual activity. If you notice anything suspicious, investigate immediately. Suspicious computer activity can include:

• unexpected system slowdowns
• file modifications
• missing files or folders
• Your PC's processor is "humming" while you're doing nothing.

Have an intervention 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.

Do you need a cybersecurity analysis?

Don't let unknown threats lurk in your system. A cybersecurity audit can uncover vulnerabilities in your system. It's an important proactive measure to ensure network security. Call us today to schedule an appointment.

About Nexxo

Nexxo Computer Solutions specializes in providing IT and technology services to Quebec businesses. Its mission is to offer Quebec companies IT services tailored to their needs. Acting as an external IT department, it handles all of a company's IT tasks, allowing it to focus on its business activities. It achieves this by collaborating closely with its clients and putting their interests at the center of its concerns.