BEIJING: A Chinese tech security firm was able to breach foreign governments, infiltrate social media accounts and hack personal computers, a massive data leak analyzed by experts this week revealed.

The trove of documents from I-Soon, a private company that competed for Chinese government contracts, shows that its hackers compromised more than a dozen governments, cybersecurity firms SentinelLabs and Malwarebytes said.

I-Soon also breached "democracy organizations" in China's semi-autonomous city of Hong Kong, universities and the North Atlantic Treaty Organization, SentinelLabs researchers wrote on Wednesday.

The leaked data, the contents of which Agence France-Presse (AFP) was unable to immediately verify, was posted on the online software repository GitHub by an unknown individual last week.

"The leak provides some of the most concrete details seen publicly to date, revealing the maturing nature of China's cyber espionage ecosystem," SentinelLabs analysts said.

I-Soon was able to breach government offices in India, Thailand, Vietnam and South Korea, among others, Malwarebytes said in a separate post on Wednesday.

I-Soon's website was not available on Thursday morning, though an internet archive snapshot of the site from Tuesday says it is based in the eastern Chinese city of Shanghai, with subsidiaries and offices in the capital Beijing and the provinces of Sichuan, Jiangsu and Zhejiang.

The firm did not reply to a request for comment from AFP.

Asked by AFP on Thursday about whether Beijing contracted hackers, China's Foreign Ministry said it was "not aware" of the case.

"As a principle, China firmly opposes all forms of cyberattacks and cracks down on them in accordance with law," Foreign Ministry spokesman Mao Ning said.

Hacks for contracts

The leak contains hundreds of files showing chatlogs, presentations and lists of targets.

AFP found what appeared to be lists of Thai and British government departments among the leaks, as well as screenshots of attempts to log into an individual's Facebook account.

Other screenshots showed arguments between an employee and a supervisor over salaries, as well as a document describing software aimed at accessing a target's Microsoft Outlook emails.

"As demonstrated by the leaked documents, third-party contractors play a significant role in facilitating and executing many of China's offensive operations in the cyber domain," SentinelLabs analysts said.

In one screenshot of a chat app conversation, someone describes a client request for exclusive access to the "Foreign secretary's office, the Foreign Ministry's Asean office, prime minister's office, national intelligence agency" and other government departments of an unnamed country.

Analysts who examined the files said the company also offered potential clients the ability to break into accounts of individuals on the X social media platform — monitoring their activity, reading their private messages and sending posts.

It also laid out how the firm's hackers could access and take over a person's computer remotely, allowing them to execute commands and monitor what they type.

Other services included ways to breach Apple's iPhone and other smartphone operating systems, as well as custom hardware, including a power bank that can extract data from a device and send it to the hackers.

Analysts said the leak also showed I-Soon bidding for contracts in China's northwestern region of Xinjiang, where Beijing stands accused of detaining hundreds of thousands of mostly Muslim people as part of a campaign against alleged extremism. The United States has called it a genocide.

"The company listed other terrorism-related targets the company had hacked previously as evidence of their ability to perform these tasks, including targeting counterterrorism centers in Pakistan and Afghanistan," SentinelLabs analysts said.

The leaked data also revealed the fees that hackers could earn, they added, including $55,000 from breaking into a government ministry in Vietnam.

A cached version of the company's website showed the firm also runs an institute dedicated to "implementing the spirit" of President Xi Jinping's "important instructions" on developing cybersecurity education and expertise.

The Federal Bureau of Investigation has said China has the biggest hacking program of any country.

Beijing has dismissed the claims as "groundless" and pointed to the US' own history of cyber espionage.

Pieter Arntz, a researcher at Malwarebytes, said the leak was likely to "rattle some cages at the infiltrated entities."

"As such, it could possibly cause a shift in international diplomacy and expose the holes in the national security of several countries," he added.