Spyware tools have been discovered on the phones of politicians, journalists, and activists on numerous occasions over the past decade. This has prompted worries regarding the lack of protections in the tech industry and an unprecedented expansion of spyware technologies.
Meta's WhatsApp recently stated that it has detected a hacking campaign aimed at roughly ninety users, the majority of whom were journalists and civil society activists from two dozen countries.
According to a WhatsApp representative, the attack was carried out by the Israeli spyware company Paragon Solutions, which is now controlled by the Florida-based private equity firm AE Industrial Partners.
Graphite, Paragon's spyware, infiltrated WhatsApp groups by sending them a malicious PDF attachment. It can access and read messages from encrypted apps such as WhatsApp and Signal without the user's knowledge.
What is a zero-click attack?
A zero-click attack, such as the one on WhatsApp, compromises a device without requiring any user activity. Unlike phishing or one-click attacks, which rely on clicking a malicious link or opening an attachment, zero-click leverages a security flaw to stealthily gain complete access after the device has been infected.
"In the case of graphite, via WhatsApp, some kind of payload, like a PDF or an image, [was sent to the victims' devices] and the underlying processes that receive and handle those packages have vulnerabilities that the attackers exploit [to] infect the phone,” Rocky Cole, co-founder of mobile threat protection company iVerify, noted.
While reports do not indicate "whether graphite can engage in privilege escalation [vulnerability] and operate outside WhatsApp or even move into the iOS kernel itself, we do know from our own detections and other work with customers, that privilege escalation via WhatsApp in order to gain kernel access is indeed possible," Cole added.
The iVerify team believes that the malicious attacks are "potentially more widespread" than the 90 individuals who were reported to have been infected by graphite because they have discovered cases where a number of WhatsApp crashes on [mobile] devices [they're] monitoring with iVerify have seemed to be malicious in nature.
While the WhatsApp hack primarily targeted civil society activists, Cole believes mobile spyware is a rising threat to everyone since mobile exploitation is more pervasive than many people realise. Moreover, the outcome is an emerging ecosystem around mobile spyware development and an increasing number of VC-backed mobile spyware companies are under pressure to become viable organisations.
This eventually increases marketing competition for spyware merchants and lowers barriers that might normally deter these attacks.
Mitigation tips
Cole recommends users to treat their phones as computers. Just as you use best practices to safeguard traditional endpoints like laptops from exploitation and compromise, you should do the same for phones. This includes rebooting your phone on a daily basis because most of these exploits remain in memory rather than files, and rebooting your phone should theoretically wipe out the malware as well, he said.
If you have an Apple device, you can also enable Lockdown Mode. As indicated by Cole, "lockdown mode has the effect of reducing some functionality of internet-facing applications [which can] in some ways reduce the attack surface to some degree."
Ultimately, the only way to properly safeguard oneself from zero-click capabilities is to address the underlying flaws. Cole emphasised that only Apple, Google, and app developers may do so. "So as an end user, it's critically important that when a new security patch is available, you apply it as soon as you possibly can," the researcher added.
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