In this article, we'll understand what Zero-Click attacks are and how they work: a growing cybersecurity threat that requires no action on your part to be effective.

You'll discover how these interaction-free attacks have evolved over time, why mobile devices such as the iPhone are frequent targets and what steps you can take to minimize the risks.

Get ready to acquire essential knowledge that will help you protect your data and your company's data from invisible but dangerous intrusions. Come with me!

What is zero-click malware?

Zero-Click Malware refers to an advanced cyber threat. It operates discreetly, compromising devices without user action. It is stealthy: it avoids detection and, when it does occur, it can carry out a series of malicious actions.

Let's find out where these attacks come from?

The history of Zero-Click Attacks

Zero-click attacks are not a recent invention. They date back to the dawn of the digital age. Initially, they were almost exclusive to intelligence agencies and groups of highly specialized hackers.

With technological advances, the tools needed to carry out this type of attack have become more accessible. The first identified attacks, aimed at the general public, appeared in the 2000s...

...but it was in the last decade that they became a concern, especially with the disclosure of programs like Pegasus, which was allegedly used to spy on activists, journalists and politicians in several countries!

These events marked a turning point: they showed that Zero-Click attacks could affect any individual or organization. Let's find out how a Zero-Click attack works and why they remain such an effective and pernicious threat.

How does a Zero-Click Attack happen?

This type of attack occurs through undetected or unpatched vulnerabilities in software or operating systems. These flaws are like hidden doors for criminals, allowing them unauthorized access to a device.

I'll give you examples of some of these vulnerabilities:

• Receiving Malicious Content: something as simple as receiving a message or an email can be the trigger. This content often doesn't even need to be opened; the attack begins as soon as the content is delivered and processed by the device.
  
  
• Exploitation of Network Services: network connections such as Wi-Fi and Bluetooth can also be attack vectors. Watch out for public networks or open internet sources where you connect your device!
  
  
• Outdated Operating Systems: many attacks exploit systems that are not up-to-date with the latest security patches, taking advantage of loopholes known to attackers but not yet corrected by the user.

Once inside the system, criminals can gain access to sensitive data, turning this intrusion into a critical vulnerability for organizations and individuals.

The sophistication of these attacks varies, from simple scripts that exploit a single vulnerability to complex exploitation chains that use multiple flaws in systems and applications.

Once the attacker gains access to the device, they can:

• Stealing information;
  
  
• Installing other types of malware;
  
  
• Or even control the device remotely!

In the next section, we'll look at some statistics and trends on the subject that will really worry you (and you'd better be). Are you ready?

Interesting Statistics on Zero-Click Attacks

• According to a report by cybersecurity company ZecOps, the number of Zero-Click attacks detected increased by more than 50% from 2021 to 2022.
  
  
• A Kaspersky study revealed that in 2022, around 47% of smartphones affected by surveillance software were subject to at least one attempted Zero-Click attack.

But let me go further and give you some real examples.

Examples of Zero-Click malware

Real-life examples of Zero-Click malware highlight the ingenuity and danger of these attacks. Here are some of the most notorious cases.

1# Case Study: Pegasus Spyware

Developed by NSO Group, Pegasus is perhaps the most famous example of Zero-Click spyware. Capable of infecting iPhones and Android devices, it has been used to spy on journalists, activists and political leaders around the world. It can record calls, capture messages and even remotely activate cameras and microphones.

Pegasus can be installed on a device without the owner doing anything; there's no need to click on links or download a file: the attack can take place via a missed call on WhatsApp or a glitch in iMessage.

In 2021, an investigation by a global consortium of journalists revealed that Pegasus had been used to spy on at least 50,000 phone numbers in several countries.

2# Case Study: SolarWinds

The attack on SolarWinds, which began in 2019 and was discovered at the end of 2020, is a complex example of an attack on a supply chain.

Although not a zero-click attack in the traditional sense, it resulted in unauthorized access and control of systems without the direct interaction of the end user. If you're curious, check out the story in the video below:

Each of these examples shows how diverse Zero-Click malware can be in its methods and targets - and the significant impact it has on information privacy and security.

In the next chapter, we'll find out how to identify possible zero-click attacks and the measures that can be taken to prevent them.

How to identify a Zero-Click Attack?

Identifying a Zero-Click attack can be challenging, as these attacks are designed to be discreet and leave as few traces as possible. But there are signs that can alert users to the possibility of a compromise.

Let's get to know the main ones.

1 - Abnormal device behavior

If the device starts acting strangely, such as restarting for no apparent reason, applications closing unexpectedly or an unexplained increase in data usage, it could be indicative of an attack.

2 - Peaks in network activity

Unusual network traffic monitoring, especially during periods of inactivity, can be a sign of malicious activity in the background.

3 - Reduced performance

General system slowness or abnormal battery consumption may suggest that malicious processes are running in the background, hidden from the naked eye.

4 - Security breaches reported

If there is news of newly discovered vulnerabilities in the software you use and they have not yet been fixed, you should be especially vigilant. An example of one of these is shown in the video below:

5 - Security alerts

Modern cybersecurity and antivirus tools may not always be able to prevent Zero-Click attacks, but they can provide alerts of suspicious activity!

It is important to note that theabsence of signals does not guarantee that the device has not been compromised...

...proactive security, including regular maintenance and security updates, is the best approach to minimize the risk of these attacks!

And for that reason: let's look at ways to protect ourselves.

How do I protect myself from Zero-Click Attacks?

Protection against Zero-Click attacks requires a combination of up-to-date security practices and the use of specialized tools. Here are some key strategies:

• Keep the software up to date: always make sure that the operating system and all applications are up to date with the latest versions and security patches;
  
  
• Use robust security solutions: invest in reliable cybersecurity solutions that include real-time protection against malware and behavioral analysis;
  
  
• Monitor network activity: use tools to monitor network traffic, identifying and investigating suspicious activity;
  
  
• Multi-layered security: Implement a multi-layered security strategy, which can include UTM (Unified Threat Management), firewalls, VPN services, two-factor authentication and a trusted credential manager.

In addition to the practices mentioned above, remember to implement measures to protect confidential data and restrict the attack surface, reducing the number of possible attack vectors.

Attack surface? What do you mean?

The attack surface of a device or network includes all the points through which an attacker can enter or extract confidential information. Limiting these points and understanding the most common types of attacks and attack vectors can significantly strengthen online security.

Question: if you need to invest in these kinds of defensive practices today, what solutions on the market can help you protect yourself?

Example: Zero-Click Protection with Check Point WatchGuard

WatchGuard offers advanced technologies to protect against cyber attacks, such as deep network packet inspection and sandboxing, which can detect and block attacks before they reach users' devices.

Important: the company also provides regular security updates to respond to new threats as they are identified.

Some of WatchGuard's solutions include:

• Sandboxing Zero-Day Protection: which uses advanced threat prevention techniques, including threat emulation and content extraction, in real context, to protect devices before malware can cause damage.

• ThreatSync: the largest collaborative network for fighting cyberattacks, which collects and shares information on the latest threats from around the world; it allows WatchGuard 's solutions to be updated in real time, offering protection against the latest threats.
  

• Advance EPDR: is designed to offer total security to endpoints, protecting them against advanced threats, including Zero-Click attacks. This product integrates threat prevention, data and access security in a single agent, guaranteeing comprehensive protection.

• Behavioral analysis and threat prevention: to detect abnormal behavior on devices, which could be an indication of a Zero-Click attack in progress. By identifying these behaviors, WatchGuard's solutions can intervene quickly to neutralize the threat.

What does Mobile Threat Defense (MTD) mean?

Whether it's WatchGuard or any other brand, this is the solution to watch out for.

Mobile Threat Defense (MTD) is a technology designed to protect mobile devices against a wide range of cyber threats, including Zero-Click attacks.

With the increasing dependence on smartphones and tablets in corporate and personal environments, MTD has become a key part of the cybersecurity strategy.

Here are the key functions of this technology:

• Abnormal Behavior Detection: MTD uses advanced algorithms and machine learning to continuously monitor device behavior. Any deviation from standard behavior, such as excessive data or battery usage, can indicate the presence of malware or malicious activity.

• Real-time protection: unlike solutions that require user intervention to initiate scans, MTD offers real-time protection, with constant analysis to block threats as they arise, without negatively impacting device performance.
  
  
• Application Analysis: This feature evaluates the applications installed on the devices, identifying those that may pose risks due to known vulnerabilities or suspicious behavior, thus helping to prevent potential security breaches.

• Network Security: i.e. it provides protection against network-based attacks such as man-in-the-middle (MitM), ensuring that the device's data connections are secure and encrypted, protecting the transmission of sensitive data.
  
  
• Vulnerability Management: Identifies and reports vulnerabilities in operating systems and applications, providing recommendations to mitigate the associated risks, such as security updates and patches.

Companies such as WatchGuard, Symantec or Sophos offer MTD solutions that integrate these features, providing a robust layer of defense for mobile devices.

Adopting MTD not only helps protect critical data and IT infrastructure, but also reinforces compliance with data protection regulations such as the GDPR by ensuring that sensitive information is properly protected on all mobile devices.

Main Threats and Trends: what should I watch out for?

Advanced persistent threats are a primary threat in the cyberattack landscape, where critical vulnerabilities in operating systems and software vulnerabilities, including vulnerabilities in plugins, are exploited.

Personal devices, especially mobile devices such as iOS devices, are increasingly targeted by theft malware and malicious code

But this discussion became universal as a result of a problem with an iPhone, remember? We'll find out exactly what happened in the next chapter.

The mobile malware landscape: Click Zero on iPhone

As we move forward in this discussion about defending against mobile threats, it's crucial to address one of the most notable cases in the world of mobile devices: the Zero-Click attacks targeting iPhones. Let's see all about this case.

iPhone and Zero-Click Messaging Attacks

One of the most emblematic episodes in this saga was the discovery of a critical flaw in the iPhone software, which allowed Zero-Click attacks to be carried out via the messaging service. Apple responded quickly with the iOS 14.8 update, a crucial measure to mitigate the vulnerability exploited by these attacks.

Watch the video below to see how it worked:

iPhone flaw exploited for 4 years

And the most curious thing?

Investigations have revealed that this particular security flaw in the iPhone was active and being exploited for around four years before it was detected and fixed. Remember, we're talking about one of the most "secure" companies in the world!

(More) Danger in iMessage: Kaspersky discovers Zero-Click spyware infecting iPhones and iPads

In a separate case, Kaspersky Lab identified Zero-Click spyware that took advantage of iMessage to infiltrate iPhones and iPads. This type of spyware not only compromised the user's privacy, but also put sensitive data stored on the devices at risk.

This is what you can read in the news from tecmundo.com.br:

"Kaspersky has discovered a security vulnerability present in iOS 16.6 (or older versions). The flaw was found in mid-2023, during Operation Triangulation, and allows cybercriminals to breach the system's memory protection."

- Jornal de Notícias

And at this point, it's natural to wonder what to do if you suspect your device has been compromised. Read on to find out!

What should I do if I suspect my iPhone has been compromised?

If you suspect an attack without interaction, such as Zero-Click attacks, it is crucial to carry out a data check to identify any suspicious data changes and ensure the security of your personal or corporate data.

Also, pay attention to some of the recommended actions:

• Update your iOS: check for available updates to the operating system and apply them immediately. Apple frequently releases security patches to combat vulnerabilities exploited by malware!
  
  
• Analyze the state of the system with a security app: use a reputable security app to check up on your iPhone. Although iOS is designed to be secure, the action of a "foreign" app can help identify problems.
  
  The best iPhone security apps. Click to read the article!
  
  
• Restart the device: a simple restart can stop malicious processes temporarily, especially if the malware has failed to establish persistence!
  
  
• Restore to factory settings: in extreme cases, if you suspect that your device has been deeply compromised, consider restoring it to factory settings. Remember to back up your data before this step!

• Contact Apple support: and if you are unsure how to proceed, contacting Apple technical support can provide additional guidance specific to your case. Last resort!
  

And if you haven't been attacked yet and simply want to avoid problems: how do you protect your iPhone from Zero-Click attacks? That's what we're going to find out.

What measures can I take to protect my iPhone?

To protect yourself against messaging and other attacks, such as those that exploit critical vulnerabilities, it is essential to keep up to date with evolving threats and apply the main defense actions, such as security updates and the use of robust solutions against malicious software.

But we'll be there soon!

Protecting your iPhone from threats, including zero-click attacks, involves a series of best practices. To make your life easier, I'll start by sharing the main ones with you:

• Keep iOS up to date: always install the latest software updates to ensure your device has the latest security patches;
  
  
• Back up regularly: use iCloud or iTunes to make regular backups of your iPhone to ensure that you can restore your data in the event of problems;

• Use two-factor authentication (2FA): activate 2FA for your Apple ID and other important services to add an extra layer of security;
  

• Be careful with links and attachments: avoid clicking on links or opening attachments from unknown or unsolicited sources;
  
  
• Set up a strong passcode: use an alphanumeric passcode to lock your iPhone (it's more secure than a simple 4- or 6-digit code);
  
  
• Use security applications: consider installing third-party security applications that offer additional protection against malware and other online threats.
  

Adopting these measures can not only help protect your iPhone against zero-click attacks, but also strengthen your security against a variety of other cyber threats. But the question remains...

What about today?

Has Apple fixed the problems related to this vulnerability, which has affected people's and companies' cell phones worldwide?

Has Apple fixed the problems caused by this attack?

The answer is yes.

Apple has a consistent track record of responding promptly to security threats to its devices. In the case of the Zero-Click attacks mentioned, the company acted quickly, releasing specific security updates such as iOS 14.8, which aimed to mitigate the flaws exploited by the attackers, as we saw earlier

But is it only iPhones that suffer from this problem? Read on to discover other types of Click Zero attack that are typical on mobile devices.

Other types of Click Zero attacks on mobile

After exploring the specific situation of iPhones and Apple's response to Zero-Click attacks, it's worth widening our gaze to other examples that have affected the mobile universe. As we'll see, these attacks are not limited to one brand or operating system!

Pegasus - A sophisticated piece of programming

One of the most infamous examples of spying software that uses Zero-Click attack techniques is Pegasus, developed by NSO Group. This software is designed to infiltrate mobile devices stealthily, without any interaction required on the part of the target.

How does Pegasus work?

Pegasus is capable of turning a smartphone into a surveillance tool for attackers, allowing them not only to access messages, emails and data, but also to activate cameras and microphones remotely. This type of software has been used in several cases to spy on activists, journalists and even members of governments!

Pegasus' sophistication lies in its ability to exploit multiple zero-day vulnerabilities (previously unknown security flaws) in popular operating systems such as iOS and Android.

Detecting and neutralizing this software is extremely challenging, given its evasive nature and the use of encryption and camouflage techniques.

To finish off, and so that you leave completely enlightened, I'm going to quickly go through the legislation that exists on this subject, before I say goodbye!

Zero-Click Attacks: Legislation and Regulation

In response to this type of cyber threat, several countries have developed and implemented specific laws designed to strengthen digital security and data protection. Let's take a look at the main ones:

• GDPR (General Data Protection Regulation) in the European Union: The GDPR imposes strict data protection obligations on organizations and gives individuals greater control over their personal data. Although it does not specifically address malware or Zero-Click attacks, the GDPR encourages robust security practices, including the need to notify authorities and affected individuals in the event of data breaches, which can include malware infections.
  
  
• US Cybersecurity Act (CISA 2015): The Cybersecurity Act of 2015, known as CISA, promotes the sharing of cyber threat information between the private sector and the government in the US. This law seeks to improve the detection and prevention of cyberattacks, including Zero-Click attacks, by facilitating collaboration and the sharing of threat information.
  
  Cybersecurity in Europe: what is being done? Click to read the article
  
  
• The UK's Computer Misuse Act 1990: This law, although older, has been updated to address evolutions in the cyber threat landscape. It criminalizes the creation and distribution of malware, including that used in Zero-Click attacks.

Despite these legislative efforts, combating zero-click attacks presents unique challenges. The transnational nature of the internet and the rapid development of new technologies often outstrip the ability of existing laws to respond.

In addition, there is a delicate balance between guaranteeing national security and protecting individuals' rights to privacy and freedom of expression. The more we have one, the less we have the other!

Conclusão

We explored the world of Zero-Click attacks, revealing how they operate without the need for direct interaction. We covered everything from their history to measures for detecting and protecting devices, with a special focus on iPhones.

Are you better equipped to safeguard your information and that of your company in the digital world? I hope so!

Apart from that...

Protecting against previous attacks and preparing for DDoS and bot attacks requires a comprehensive understanding of potential threats and close collaboration with intelligence and government agencies.

The implementation of spyware components such as spyware predator and the protection of banking information are vital for a high-capacity response capability against mobile malware. But that's a topic for another article!

Remember that Morebiz - IT Business Solutions is here to help if you have suffered (or suspect you are suffering) this or any other type of cyber attack. If you need us, book your free online meeting here.

See you in the next article!