The Citizen Lab is an interdisciplinary research unit at the Munk School of Global Affairs & Public Policy, University of Toronto. We apply our collective expertise in the fields of law, computer science, cybersecurity, political science, and social sciences to investigate complex issues of the 21st century. Explore…
Visit citizenlab.ca → On Hacker News Mar 2018 – Oct 2026
Security & Privacy 23Society, Policy & Culture 19Networking & Internet 4Tech Industry & Business 3Software Engineering 1AI & Machine Learning 1
Citizen Lab found an actively exploited zero-click vulnerability being used to deliver NSO Group’s Pegasus mercenary spyware while checking the device of an individual employed by a Washington DC-based civil society organization with international offices. We refer to the exploit chain as BLASTPASS. The exploit chain…
WeChat communications conducted entirely among non-China-registered accounts are subject to pervasive content surveillance that was previously thought to be exclusively reserved for China-registered accounts.
This report examines the encryption that protects meetings in Zoom and finds that they have made their own encryption scheme and has significant weaknesses.
Our forensic analysis of two iPhones belonging to Hubbard found evidence of Pegasus infections in July 2020 and June 2021. Notably, these infections occurred after Hubbard reported in January 2020 that we found that he was targeted in 2018 by the Saudi Arabia-linked Pegasus operator that we call KINGDOM.
While analyzing the phone of a Saudi activist infected with NSO Group’s Pegasus spyware, we discovered a zero-day zero-click exploit against iMessage. The exploit, which we call FORCEDENTRY, targets Apple’s image rendering library, and was effective against Apple iOS, MacOS and WatchOS devices.
We confirm that in 2020 and 2021 we observed and notified the government of the United Kingdom of multiple suspected instances of Pegasus spyware infections within official UK networks, including the Prime Minister’s Office and the Foreign and Commonwealth Office.
Government operatives used NSO Group’s Pegasus spyware to hack 36 personal phones belonging to journalists, producers, anchors, and executives at Al Jazeera. The journalists were hacked by four Pegasus operators, including one operator MONARCHY that we attribute to Saudi Arabia, and one operator SNEAKY KESTREL that we…
This is the first-ever public confirmation of zero-click mercenary spyware delivered via targeted ads. We call the technique AdFection, and show how it was used to infect devices at Al Jazeera with Candiru’s spyware. We also uncover Discover-Tech, and show how the company helps mercenary surveillance vendors track and…
We found that former Member of the European Parliament Stelios Kouloglou was hacked with Pegasus spyware while serving on the PEGA committee, which investigated Pegasus and other spyware abuses in Europe. Through forensic analysis of his device, we found that the attackers could have had access to confidential…
The Citizen Lab, in collaboration with Catalan civil society groups, has identified at least 65 individuals targeted or infected with mercenary spyware, including members of the European Parliament, Catalan Presidents, legislators, jurists, and members of civil society organisations.
We identified nine Bahraini activists whose iPhones were successfully hacked with NSO Group’s Pegasus spyware between June 2020 and February 2021. The hacked activists included three members of Waad (a secular Bahraini political society), three members of the Bahrain Center for Human Rights, two exiled Bahraini…
A network of at least 123 websites operated from within the People’s Republic of China while posing as local news outlets in 30 countries across Europe, Asia, and Latin America, disseminates pro-Beijing disinformation and ad hominem attacks within much larger volumes of commercial press releases. We name this campaign…
Circles is a surveillance firm that reportedly exploits weaknesses in the global mobile phone system to snoop on calls, texts, and the location of phones around the globe, and is affiliated with NSO Group, which develops the oft-abused Pegasus spyware. Using Internet scanning, we found a unique signature associated…
Mexican digital rights organization R3D, with technical support from the Citizen Lab, has determined that Mexican journalists and a human rights defender were infected with Pegasus between 2019 and 2021. The infections occurred years after the first revelations of Pegasus abuses in Mexico, and after Mexico’s current…
Our investigation uncovers two sophisticated telecom surveillance campaigns and, for the first time, links real-world attack traffic to mobile operator signalling infrastructure. The findings expose how suspected commercial surveillance vendors (CSVs) exploit the global telecom interconnect ecosystem, leverage private…
A sustained, coordinated social media harassment and doxxing campaign – which we codenamed JUICYJAM – targeting the pro-democracy movement in Thailand has run uninterrupted, and unchallenged, since at least August 2020. Through our analysis of public social media posts we determined that the campaign was not only…
Candiru is a secretive Israel-based company that sells spyware exclusively to governments. Using Internet scanning, we identified more than 750 websites linked to Candiru’s spyware infrastructure. We found many domains masquerading as advocacy organizations such as Amnesty International, the Black Lives Matter…
This document provides a summary of the Citizen Lab's WeChat surveillance research findings, as well as questions and answers from the resesearch team.
Psiphon, a software company that helps internet users under oppressive regimes evade online censorship, plans to leave Canada if the lawful-access bill passes.
This report performs the first public analysis of MMTLS, the main network protocol used by WeChat, an app with over one billion users. The report finds that MMTLS is a modified version of TLS, however some of the modifications have introduced cryptographic weaknesses.
In this work, we study how Tencent implements image filtering on WeChat. We found that Tencent implements realtime, automatic censorship of chat images on WeChat based on what text is in an image and based on an image’s visual similarity to those on a blacklist. Tencent facilitates this realtime filtering by…
An investigation revealing that Mexican soda tax supporters were targeted with NSO Group's government-exclusive spyware and exploit framework.
Two Egyptians—exiled politician Ayman Nour and the host of a popular news program (who wishes to remain anonymous)—were hacked with Predator spyware, built and sold by the previously little-known mercenary spyware developer Cytrox. The phone of Ayman Nour was simultaneously infected with both Cytrox’s Predator and NSO…
This report describes our investigation into the apparent use of Sandvine/Procera Networks Deep Packet Inspection (DPI) devices to deliver nation-state malware in Turkey and indirectly into Syria, and to covertly raise money through affiliate ads and cryptocurrency mining in Egypt.
We analyze the system Amazon deploys on the US “amazon.com” storefront to restrict shipments of certain products to specific regions. We found 17,050 products that Amazon restricted from being shipped to at least one world region. - While many of the shipping restrictions are related to regulations involving WiFi, car…
In this report, we analyze the Windows, Android, and iOS versions of Tencent’s Sogou Input Method, the most popular Chinese-language input method in China. Our analysis found serious vulnerabilities in the app’s custom encryption system and how it encrypts sensitive data. These vulnerabilities could allow a network…