Malware attacks continue to become more sophisticated, with different types of malware in cybersecurity being used to exploit business vulnerabilities. Read on to find out what zero-click malware attacks are, which weaknesses they exploit, and how to protect your business from them.
What is zero-click malware?
Zero-click malware is a type of malicious software designed to exploit both device and system vulnerabilities without any user interaction. This means that attacks can occur without users needing to click on a link or open a file. They can target a wide range of systems; however, zero-click malware primarily targets messaging apps and communication systems. It’s known for its ability to bypass traditional security defences, causing damage without teams being alerted.
How does zero-click malware work?
Zero-click malware works by silently executing malicious code via flaws in messaging apps, network protocols, or operating systems, often through push notifications, SMS, or data packets. This makes zero-click attacks especially dangerous, as they bypass human error entirely. Victims remain unaware of the compromise, allowing attackers to gain control, steal data, or spy without detection. Their stealth and sophistication make them one of the most challenging cyber threats to defend against.
What do zero-click malware attacks exploit?
They are designed to exploit a variety of system and human vulnerabilities:
Unsecured network protocols
Unsecured network protocols leave businesses vulnerable, allowing attackers to exploit them through HTTP, FTP, DSN, etc. By exploiting weak communication channels, cybercriminals can manipulate network protocols to intercept data and access further parts of the network. These attacks often go unnoticed, making secure protocol configuration and continuous monitoring essential for protection.
Memory corruption
Zero-click malware also targets memory corruption as part of its strategy. It exploits flaws in how a device handles memory, allowing cybercriminals to gain unauthorised access without user interaction. By manipulating these vulnerabilities, attackers can execute arbitrary code, taking control of critical processes and escalating privileges within internal systems. This grants them deeper access to sensitive data and system functions, often undetected.
Operating system flaws
Operating systems are particularly vulnerable to zero-click malware. Many operating systems have “zero-day vulnerabilities”: undisclosed vulnerabilities that have been present in the system since its inception and have never been addressed. In fact, 35% of all malware attacks are identified as zero-day malware, specifically designed to target these weaknesses.
Hardware vulnerabilities
Hardware vulnerabilities are exploited by targeting flaws in device hardware, allowing basic security to be bypassed without user interaction. These attacks can silently compromise devices, enabling attackers to create fake websites that mimic legitimate ones, such as banking or corporate portals. Once accessed, these fake sites can be used to capture everything from login credentials to financial data.
How do I detect zero-click malware attacks?
Detecting zero-click malware attacks can prove particularly difficult due to the lack of interaction needed to exploit these vulnerabilities. However, there are strategies for identifying them before or as they are happening. Keep an eye out for:
- Unusual IPs or domains created
- Sudden and unexpected spikes in system traffic
- Unexpected camera usage on external or internal webcams
- Altered system files or file libraries
Why are zero-click malware attacks a threat to businesses?
This type of cybersecurity threat can lead to significant financial losses through theft, ransom demands, or business disruption. If personal data is exposed, companies risk breaching GDPR, resulting in hefty fines and even legal penalties. Incidents like these damage customer trust and brand reputation, which are difficult to rebuild. With a compromised security record, it can also be difficult for a business to secure funding or partnership opportunities, as investors and stakeholders may view the business as high-risk.
How can penetration testing prevent zero-click malware attacks?
Penetration testing plays a vital role in defending businesses against zero-click malware attacks, simulating real-world threats to uncover vulnerabilities before they can be exploited. Evaluating internal teams’ response to threats, penetration testing exposes weaknesses in systems, processes, and employee education. Continuous monitoring, combined with tools like vulnerability scanning and threat intelligence, ensures businesses stay ahead of active threats. OnSecurity’s penetration testing and social engineering pen testing services provide expert-driven assessments tailored to your infrastructure.
Find out more about how OnSecurity can help keep your business safe from evolving cybersecurity threats: get in touch or get an instant quote today.
