The WhatsApp cyberattack earlier this year that infected devices with advanced surveillance tools, had a more sinister aspect to it than first thought.
According to Reuters, citing sources familiar with WhatsApp’s internal investigation into the breach, a “significant” portion of the known victims are high-profile government and military officials spread across at least 20 countries on five continents.
Many of the nations targetted are said to be US allies, prompting fears that the attack may have been carried out for a nation-state hostile to the West.
In May 2019, WhatsApp urged all of its 1.5 billion users to update their software to fix a vulnerability that it said was being actively exploited to implant advanced surveillance tools on users’ devices.
The Facebook-owned company discovered the vulnerability earlier in May and released a fix. The Financial Times reported in May that the bug was used to implant spyware developed by NSO Group, citing an unnamed surveillance software maker as its source.
NSO Group is an Israeli firm that is in the business of developing surveillance tools that are intended for use by governments and law enforcement agencies.
Earlier this year it is alleged that when attackers rang up a target’s phone, the malicious code would automatically infect the device (even if the call was not answered), WhatsApp said in a technical document on the issue.
The attack involved a buffer overflow vulnerability in WhatsApp’s voice over internet protocol (VOIP) stack that allowed remote code execution via a series of specially crafted secure real-time control protocol (SRTCP) packets, WhatsApp said in May.
At the time, WhatsApp acknowledged that the vulnerability had been used to install spyware, without mentioning NSO by name.
“This attack has all the hallmarks of a private company known to work with governments to deliver spyware that reportedly takes over the functions of mobile phone operating systems,” WhatsApp said in a statement back in May.
Earlier this week, WhatsApp felt it had enough evidence and opted to sue NSO over the matter.
In a court filing, WhatsApp said NSO Group “developed their malware in order to access messages and other communications after they were decrypted on target devices”.
It alleged that NSO Group created various WhatsApp accounts and caused the malicious code to be transmitted over the WhatsApp servers in April and May.
However NSO Group told the BBC that it would fight the allegations.
“In the strongest possible terms, we dispute today’s allegations and will vigorously fight them,” the company said in a statement to the BBC.
“The sole purpose of NSO is to provide technology to licensed government intelligence and law enforcement agencies to help them fight terrorism and serious crime,” it added.
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