china
Chinese cyberspies breach Singapore’s four largest telcos
The Chinese threat actor tracked as UNC3886 breached Singapore’s four largest telecommunication service providers, Singtel, StarHub, M1, and Simba, at least once last year. The hackers also gained limited access to critical systems but did not pivot deep enough to disrupt services. In response to the intrusions, which were disclosed in July 2025, Singapore deployed […]
DKnife Linux toolkit hijacks router traffic to spy, deliver malware
A newly discovered toolkit called DKnife has been used since 2019 to hijack traffic at the edge-device level and deliver malware in espionage campaigns. The framework serves as a post-compromise framework for traffic monitoring and adversary-in-the-middle (AitM) activities. It is designed to intercept and manipulate traffic destined for endpoints (computers, mobile devices, IoTs) on the network. […]
Notepad++ update feature hijacked by Chinese state hackers for months
Chinese state-sponsored threat actors were likely behind the hijacking of Notepad++ update traffic last year that lasted for almost half a year, the developer states in an official announcement today. The attackers intercepted and selectively redirected update requests from certain users to malicious servers, serving tampered update manifests by exploiting a security gap in the Notepad++ update […]
U.S. convicts ex-Google engineer for sending AI tech data to China
A U.S. federal jury has convicted Linwei Ding, a former software engineer at Google, for stealing AI supercomputer data from his employer and secretly sharing it with Chinese tech firms. Ding was originally indicted in March 2024 after he lied and didn’t sincerely cooperate with Google’s internal investigation, leading to his arrest in California. According to the […]
Chinese Mustang Panda hackers deploy infostealers via CoolClient backdoor
The Chinese espionage threat group Mustang Panda has updated its CoolClient backdoor to a new variant that can steal login data from browsers and monitor the clipboard. According to Kaspersky researchers, the malware has also been used to deploy a previously unseen rootkit. However, a technical analysis will be provided in a future report. CoolClient has […]
China-linked hackers exploited Sitecore zero-day for initial access
An advanced threat actor tracked as UAT-8837 and believed to be linked to China has been focusing on critical infrastructure systems in North America, gaining access by exploiting both known and zero-day vulnerabilities. The hacker group has been active since at least 2025, and its purpose appears to be mainly to obtain initial access to […]
Cisco finally fixes AsyncOS zero-day exploited since November
Cisco has finally patched a maximum-severity Cisco AsyncOS zero-day exploited in attacks against Secure Email Gateway (SEG) and Secure Email and Web Manager (SEWM) appliances since November 2025. As Cisco explained in December, when it disclosed the vulnerability (CVE-2025-20393), it affects only Cisco SEG and Cisco SEWM appliances with non-standard configurations when the Spam Quarantine […]
New China-linked hackers breach telcos using edge device exploits
A sophisticated threat actor that uses Linux-based malware to target telecommunications providers has recently broadened its operations to include organizations in Southeastern Europe. Tracked internally by Cisco Talos as UAT-7290, the actor shows strong China nexus indicators and typically focuses on telcos in South Asia in cyber-espionage operations. Active since at least 2022, the UAT-7290 group also serves […]
VMware ESXi zero-days likely exploited a year before disclosure
Chinese-speaking threat actors used a compromised SonicWall VPN appliance to deliver a VMware ESXi exploit toolkit that seems to have been developed more than a year before the targeted vulnerabilities became publicly known. In attacks from December 2025 analyzed by Huntress, managed security company, the hackers used a sophisticated virtual machine (VM) escape that likely exploited three VMware […]
Taiwan says China’s attacks on its energy sector increased tenfold
The National Security Bureau in Taiwan says that China’s attacks on the country’s energy sector increased tenfold in 2025 compared to the previous year. A report from the agency highlights that attackers targeted critical infrastructure in nine key sectors, and the total number of cyber incidents linked to China grew by 6%. The emergency rescue […]