The United Kingdom’s National Cyber Security Centre (NCSC) has cautioned that hacking groups connected to China are responsible for an increasing number of cyberattacks targeting British organisations. Officials say the country has become one of the most capable and persistent sources of digital threats worldwide, with operations extending across government systems, private firms, and global institutions.
Paul Chichester, the NCSC’s Director of Operations, explained that certain nations, including China, are now using cyber intrusions as part of their broader national strategy to gain intelligence and influence. According to the NCSC’s latest annual report, China remains a “highly sophisticated” threat actor capable of conducting complex and coordinated attacks.
This warning coincides with a government initiative urging major UK companies to take stronger measures to secure their digital infrastructure. Ministers have written to hundreds of business leaders, asking them to review their cyber readiness and adopt more proactive protection strategies against ransomware, data theft, and state-sponsored attacks.
Last year, security agencies from the Five Eyes alliance, comprising the UK, the United States, Canada, Australia, and New Zealand uncovered a large-scale operation by a Chinese company that controlled a botnet of over 260,000 compromised devices. In August, officials again warned that Chinese-backed hackers were targeting telecommunications providers by exploiting vulnerabilities in routers and using infected devices to infiltrate additional networks.
The NCSC also noted that other nations, including Russia, are believed to be “pre-positioning” their cyber capabilities in critical sectors such as energy and transportation. Chichester emphasized that the war in Ukraine has demonstrated how cyber operations are now used as instruments of power, enabling states to disrupt essential services and advance strategic goals.
Artificial Intelligence: A New Tool for Attackers
The report highlights that artificial intelligence is increasingly being used by hostile actors to improve the speed and efficiency of existing attack techniques. The NCSC clarified that, while AI is not currently enabling entirely new forms of attacks, it allows adversaries to automate certain stages of hacking, such as identifying security flaws or crafting convincing phishing emails.
Ollie Whitehouse, the NCSC’s Chief Technology Officer, described AI as a “productivity enhancer” for cybercriminals. He explained that it is helping less experienced hackers conduct sophisticated campaigns and enabling organized groups to expand operations more rapidly. However, he reassured that AI does not currently pose an existential threat to national security.
Ransomware Remains the Most Severe Risk
For UK businesses, ransomware continues to be the most pressing danger. Criminals behind these attacks are financially motivated, often targeting organisations with weak security controls regardless of size or industry. The NCSC reports seeing daily incidents affecting schools, charities, and small enterprises struggling to recover from system lockouts and data loss.
To strengthen national resilience, the upcoming Cyber Security and Resilience Bill will require critical service providers, including data centres and managed service firms, to report cyber incidents within 24 hours. By increasing transparency and response speed, the government hopes to limit the impact of future attacks.
The NCSC urges business leaders to treat cyber risk as a priority at the executive level. Understanding the urgency of action, maintaining up-to-date systems, and investing in employee awareness are essential steps to prevent further damage. As cyber activity grows “more intense, frequent, and intricate,” the agency stresses that a united effort between the government and private sector is crucial to protecting the UK’s digital ecosystem.
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