Security Engineering. Ross Anderson

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Security Engineering - Ross  Anderson

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href="#udee92eaf-2a9e-5814-a3bf-db305160af6b">Part 3. For now we'll continue to look at capabilities.

      China is now the leading competitor to the USA, being second not just in terms of GDP but as a technology powerhouse. The Chinese lack the NSA's network of alliances and access to global infrastructure (although they're working hard at that). Within China itself, however, they demand unrestricted access to local data. Some US service firms used to operate there, but trouble followed. After Yahoo's systems were used to trap the dissident Wang Xiaoning in 2002, Alibaba took over Yahoo's China operation in 2005; but there was still a row when Wang's wife sued Yahoo in US courts in 2007, and showed that Yahoo had misled Congress over the matter [1764]. In 2008, it emerged that the version of Skype available in China had been modified so that messages were scanned for sensitive keywords and, if they were found, the user's texts were uploaded to a server in China [1963]. In December 2009, Google discovered a Chinese attack on its corporate infrastructure, which became known as Operation Aurora; Chinese agents had hacked into the Google systems used to do wiretaps for the FBI (see Prism above) in order to discover which of their own agents in the USA were under surveillance. Google had already suffered criticism for operating a censored version of their search engine for Chinese users, and a few months later, they pulled out of China. By this time, Facebook, Twitter and YouTube had already been blocked. A Chinese strategy was emerging of total domestic control, augmented by ever-more aggressive collection overseas.

      From about 2002, there had been a series of hacking attacks on US and UK defence agencies and contractors, codenamed ‘Titan Rain’ and ascribed to the Chinese armed forces. According to a 2004 study by the US Foreign Military Studies Office (FMSO), Chinese military doctrine sees the country in a state of war with the West; we are continuing the Cold War by attacking China, trying to overthrow its communist regime by exporting subversive ideas to it over the Internet [1884]. Chinese leaders see US service firms, news websites and anonymity tools such as Tor (which the State Department funds so that Chinese and other people can defeat censorship) as being of one fabric with the US surveillance satellites and aircraft that observe their military defences. Yahoo and Google were thus seen as fair game, just like Lockheed Martin and BAe.

      Our own group's first contact with the Chinese came in 2008. We were asked for help by the Dalai Lama, who had realised that the Chinese had hacked his office systems in the run-up to the Beijing Olympics that year. One of my research students, Shishir Nagaraja, happened to be in Delhi waiting for his UK visa to be renewed, so he volunteered to go up to the Tibetan HQ in Dharamsala and run some forensics. He found that about 35 of the 50 PCs in the office of the Tibetan government in exile had been hacked; information was being siphoned off to China, to IP addresses located near the three organs of Chinese state security charged with different aspects of Tibetan affairs. The attackers appear to have got in by sending one of the monks an email that seemed to come from a colleague; when he clicked on the attached PDF, it had a JavaScript buffer overflow that used a vulnerability in Adobe Reader to take over his machine. This technique is called phishing, as it works by offering a lure that someone bites on; when it's aimed at a specific individual (as in this case) it's called spear phishing. They then compromised the Tibetans' mail server, so that whenever one person in the office sent a .pdf file to another, it would arrive with an embedded attack. The mail server itself was in California.

      This is pretty sobering, when you stop to think about it. You get an email from a colleague sitting ten feet away, you ask him if he just sent it – and when he says yes, you click on the attachment. And your machine is suddenly infected by a server that you rent ten thousand miles away in a friendly country. We wrote this up in a tech report on the ‘Snooping Dragon’ [1376]. After it came out, we had to deal for a while with attacks on our equipment, and heckling at conference talks by Chinese people who claimed we had no evidence to attribute the attacks to their government. Colleagues at the Open Net Initiative in Toronto followed through, and eventually found from analysis of the hacking tools' dashboard that the same espionage network had targeted 1,295 computers in 103 countries [1225] – ranging from the Indian embassy in Washington through Associated Press in New York to the ministries of foreign affairs in Thailand, Iran and Laos.

      The Chinese attacks of the 2000s used smart people plus simple tools; the attacks on the Tibetans used Russian crimeware as the remote access Trojans. The state also co-opted groups of ‘patriotic hackers’, or perhaps used them for deniability; some analysts noted waves of naïve attacks on western firms that were correlated with Chinese university terms, and wondered whether students had been tasked to hack as coursework. The UK police and security service warned UK firms in 2007. By 2009, multiple Chinese probes had been reported on US electricity firms, and by 2010, Chinese spear-phishing attacks had been reported on government targets in the USA, Poland and Belgium [1306]. As with the Tibetan attacks, these typically used crude tools and had such poor operational security that it was fairly clear where they came from.

      By 2020 the attacks had become more sophisticated, with a series of advanced persistent threats (APTs) tracked by threat intelligence firms. A campaign to hack the phones of Uighurs involved multiple zero-day attacks, even on iPhones, that were delivered via compromised Uighur websites [395]; this targeted not only Uighurs in China but the diaspora too. China also conducts industrial and commercial espionage, and Western agencies claim they exploit managed service providers9. Another approach was attacking software supply chains; a Chinese group variously called Wicked Panda or Barium compromised software updates from computer maker Asus, a PC cleanup tool and a Korean remote management tool, as well as three popular computer games, getting its malware installed on millions of machines; rather than launching banking trojans or ransomware, it was then used for spying [811]. Just as in GCHQ's Operation Socialist, such indirect strategies give a way to scale attacks in territory where you're not the sovereign. And

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