DIGITAL LIFE

iPhone spyware can infect devices without a single click
An investigation by cybersecurity firms iVerify and Report URI has revealed that iPhone spyware can be distributed through legitimate advertisements and websites—without the victim needing to click a link, install an app, or open a file. These attacks exploit vulnerabilities in older versions of iOS, allowing for the theft of passwords, personal data, and information from cryptocurrency wallets.
The investigation, released on October 21, 2026, and reported by Axios the following day, identified an infrastructure that leverages advertising and traffic-analysis services used by thousands of websites. Researchers estimate that the operation spans pages receiving approximately 135 million monthly visits, though this figure does not equate to the number of infected devices.
Zero-click hacks are a holy grail for attackers and catastrophic for victims, because they can automatically install malware on devices without requiring any interaction or missteps from the target. When sophisticated hackers have deployed rare zero-click attacks in recent years, they have often exploited vulnerabilities in mobile messaging and communication apps to infect victims. But attackers have also exploited the sprawling infrastructure of the online ad ecosystem to distribute malware, sometimes with little or no interaction needed from victims. Evidence of the zero-click spyware campaign that Citizen Lab’s researchers uncovered shows the two threats merging, underscoring the extent and urgency of the risk.
“AdFection allows operators to automatically hack specific individuals with mercenary spyware as they use apps or browse the internet,” says Bill Marczak, a senior researcher at Citizen Lab. “Someone who gets hacked like this would not see anything amiss. In fact, they might not even see any ad at all.”
The situation is so concerning, he notes, because there isn’t much that people can do to protect themselves from zero-click ad attacks other than blocking ads as thoroughly as possible on all websites and platforms—a fact that intelligence agencies like the NSA and CIA seem to know all too well.
“The risk of having your device infected with spyware simply by using a website or app that displays ads is a nightmare scenario,” says Wolfie Christl, a senior Citizen Lab researcher.
During 2024 and 2025, Citizen Lab concluded that 45 devices belonging to the news outlet Al Jazeera were targeted with zero-click attacks delivered by ads. The researchers say that the targeted ads were issued by the Israeli-founded marketing firm Discover-Tech and distributed spyware attributed to the Israeli developer Candiru. Infected devices had contact with domains linked to Discover-Tech and then connected to infrastructure associated with Candiru, according to Citizen Lab’s analysis. (Al Jazeera, which participated in the investigation and shared device logs with Citizen Lab researchers, did not respond to a request for comment.)
“The ability to push individualized, arbitrary content at specific users is a hallmark of the modern online ads ecosystem, and is perfectly suited to the mercenary spyware industry,” Marczak says. “Until this architecture changes, or ad companies get serious about customer vetting, we’re going to keep seeing this kind of abuse.”
Emails and messages sent to Discover-Tech and its CEO by WIRED did not receive a response before publication. Integrity Partners, which is believed to own Candiru’s assets, following sanctions by the US government in 2021, also did not respond to requests for comment.
Google, which operates one of the world’s largest advertising businesses, terminated Discover-Tech’s registration after collaborating with Citizen Lab and researchers from the cybersecurity firm Confiant and confirming a spyware link. “Following a joint investigation with Citizen Lab and Confiant, Google blocked Discover-Tech from our ad platforms for systematically violating our policies,” a Google spokesperson says. “We also set up Safe Browsing warnings to help protect people if they navigate to websites linked to this group.”
How iPhone spyware arrives via legitimate websites...The core of the investigation centers on an operation dubbed "DeadTag." According to an analysis published by Report URI, cybercriminals are acquiring expired domains that remain linked to legacy advertising and traffic-analysis tools.
Many websites retain references to these services long after they have stopped using them. Once a domain expires and is purchased by a third party, the new owners gain control over the code that those websites continue to load automatically.
It is precisely this reliance on external resources that the DeadTag operation exploits. By taking control of abandoned domains, attackers are able to distribute malicious content through pages that users perceive as legitimate.
In the identified cases, the system distinguishes visitors using iPhones and determines whether their devices contain known vulnerabilities. When it encounters a susceptible device, it can load tools capable of exploiting browser flaws to install spyware.
The investigation identified two such tools, known as "Coruna" and "DarkSword." Both exploit iOS vulnerabilities, though they target different versions of the operating system.
Coruna: targets vulnerable versions from iOS 13 through iOS 17.2.1.
DarkSword: targets vulnerable versions from iOS 18.4 through iOS 18.7.
These ranges correspond to the versions targeted by the analyzed variants; they do not imply that every device running these versions is necessarily vulnerable. Security updates already released by Apple are crucial for protection.
Exploiting vulnerabilities in browsers and internal operating system components is not a new phenomenon. In May, TecheNet reported that over 50 vulnerabilities had been patched in iOS 17.5—including flaws in WebKit and the kernel.
Attacks have also been identified on Instagram...The research was not limited to websites using expired domains. iVerify also uncovered a campaign that distributed a variant of DarkSword via a malicious advertisement on Instagram, themed around the FIFA World Cup.
According to iVerify’s investigation, the ad infected the iPhone of an employee at a client organization while they were browsing content on the social media platform. No click on the advertisement was required.
The same user was later targeted by another attack, this time involving a malicious connection and a different variant of DarkSword. The organization’s security team received alerts and was able to change the compromised credentials before they could be used to access the corporate network.
Investigators also discovered code linked to DarkSword on hundreds of online stores that used the PrestaShop e-commerce platform. The malicious software was hidden in directories with names designed to mimic traffic analysis tools.
The combination of these techniques demonstrates that cybercriminals no longer rely solely on fraudulent messages or fake applications to compromise mobile devices. It is enough for a vulnerable iPhone to load certain malicious content via a web browser or an application.
What attackers seek to steal...The analyzed variants of Coruna and DarkSword aim to obtain information stored on the devices—specifically, passwords saved in the iPhone’s credential management system, account data, and information related to cryptocurrency wallets.
Targeted applications include Coinbase Wallet, Binance, Trust Wallet, OKX, Bitget, and Exodus, among others.
Researchers also identified capabilities for collecting contacts, messages, and location data. This information could enable other forms of fraud or facilitate subsequent attacks against personal and business accounts.
The analysis points to primarily financial motivations. However, the identities of those responsible for the "DeadTag" operation remain undetermined. There are indications linking the operators of certain exploitation campaigns to Chinese-speaking individuals, though this does not confirm their nationality or establish a connection to any government.
How to protect your iPhone from these attacks: Although these tools have the capacity to compromise devices without direct user interaction, researchers emphasize that the attacks rely on specific vulnerabilities. An iPhone with the appropriate security patches does not necessarily face the same level of risk as a device running outdated software.
Apple has previously acknowledged the existence of attacks involving malicious content on the internet. In a security advisory published in April 2026, the company explained that it had investigated these vulnerabilities and released updates to prevent them from being exploited.
According to the manufacturer, devices running updated versions of iOS were protected against the attacks identified at that time. The company even provided patches for older models that no longer support the latest versions of the operating system.
Apple also offers specific mechanisms for users targeted by sophisticated espionage operations. In August, TecheNet reported on a new wave of alerts from Apple regarding "mercenary spyware," highlighting the importance of "Lockdown Mode" for individuals at heightened risk.
To reduce risk, users should take the following precautions:
Update iOS: Install available security updates by going to Settings > General > Software Update.
Keep apps updated: Use the latest versions of your applications and compatible web browsers.
Consider using "Lockdown Mode": This Apple feature is designed primarily for individuals who are at a higher risk of being targeted by sophisticated cyberattacks.
Check for signs of compromise: If there are concrete indications of an infection, seek a technical assessment and change any potentially exposed credentials using a secure device. The investigation also offers recommendations for website operators. These include removing code associated with services that are no longer in use, monitoring external resources loaded by web pages, and implementing security policies that limit the execution of third-party code.
The potential reach of the "DeadTag" operation warrants attention, but the figures must be interpreted with care. The 135 million monthly visits represent traffic to the websites identified within the analyzed infrastructure—not the number of iPhones that were actually attacked or infected.
The investigation’s primary conclusion is that espionage tools—previously linked to operations targeting specific individuals—are now being employed in broader criminal campaigns. In this context, keeping iOS updated remains one of the most critical measures for protecting personal data, even when browsing websites that appear entirely legitimate.
Zero-click spyware can infect iPhones and other Apple devices automatically without requiring the user to click a link, open a file, or take any action.
How zero-click attacks work:
• No user interaction: Unlike traditional malware that relies on a phishing link, zero-click exploits take advantage of hidden flaws in automatic data processing services.
• Common sectors: Attackers have historically exploited vulnerabilities through messaging apps like iMessage (using malicious attachments, PDFs, or PassKit images) and web-based traffic.
• Targeted Ads ("AdFection"): Recent research by the Citizen Lab revealed campaigns where real-time online advertising auctions were weaponized to inject spyware just by loading a website or opening an app.
• Mercenary software: State-sponsored groups and commercial spyware vendors (such as NSO Group with Pegasus) use these methods to compromise high-value targets like journalists, activists, and politicians, though cybercriminals have increasingly adapted similar exploit kits for broader financial theft.
How to protect your device:
• Update iOS promptly: Install the latest software updates immediately, as Apple frequently patches active zero-day vulnerabilities.
• Enable lockdown mode: Turn on Lockdown Mode in your device settings if you believe you are at high risk of being targeted by mercenary spyware.
• Review official guidance: Check Apple’s Support Page on Mercenary Spyware for step-by-step hardening recommendations
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