September 2025 Major Cybersecurity Incidents and Trends
Multiple significant cybersecurity incidents and trends were reported in September and Q3 2025, highlighting the evolving threat landscape. Ransomware and cyber extortion continued to be major concerns, with Nevada experiencing a historic ransomware attack that forced a near-total shutdown of state government operations, severely disrupting digital infrastructure and putting essential services and resident data at risk. The attack on Nevada was described as unprecedented at the statewide level, underscoring the increasing scale and impact of ransomware campaigns. In the realm of supply chain security, the JavaScript ecosystem faced a major npm supply chain attack in September 2025, which compromised over 180 popular packages, including some under the CrowdStrike namespace. This attack was attributed to the self-replicating "Shai-Hulud" worm, serving as a stark warning about the risks inherent in open-source dependencies and the potential for widespread compromise through software supply chains. Additionally, active exploitation of the CVE-2025-10035 vulnerability in GoAnywhere Managed File Transfer was investigated, indicating ongoing targeting of file transfer solutions by threat actors. The emergence of new malware families was also noted, such as XWorm V6 with pivotal plugins and ClayRat, a new Android spyware targeting Russian users. The RondoDox campaign was observed leveraging Pwn2Own vulnerabilities and employing a shotgun approach to exploits, further demonstrating the adaptability of threat actors. Over 175 malicious npm packages were identified as hosting phishing infrastructure targeting more than 135 organizations, highlighting the persistent threat of phishing via software repositories. A record DDoS attack by the Aisuru botnet targeted US ISPs, showcasing the scale and sophistication of modern botnet operations. New Stealit campaigns were reported abusing Node.js single executable applications, reflecting the trend of attackers exploiting developer tools and environments. The newsletters also discussed advancements in malware detection, including quantum computing methods and machine learning approaches such as static portable executable header feature analysis. Cyber warfare activities during Operation Sindoor were analyzed, providing insights into malware campaign tactics and detection frameworks. Security evaluations of Android apps on budget African mobile devices and novel detection methods for railway mobile terminals were also covered, indicating a broadening focus on mobile and IoT security. These developments collectively illustrate the diverse and escalating nature of cyber threats facing organizations and governments worldwide in late 2025.
Timeline
Oct 12, 2025
Q3 2025 ransomware and cyber extortion trends are published
A Q3 2025 overview of ransomware and cyber extortion activity was published, summarizing major trends observed during the quarter. This constitutes a notable intelligence release about the broader threat landscape.
Oct 12, 2025
New campaigns abuse Node.js applications
Reporting highlighted newly identified threat campaigns abusing Node.js applications. This reflects a distinct attacker tradecraft development centered on Node.js-based execution or delivery.
Oct 12, 2025
Malicious npm packages used in phishing activity are disclosed
Security researchers reported malicious npm packages being used to facilitate phishing operations. The disclosure adds technical detail about supply-chain abuse in the Node.js ecosystem.
Oct 12, 2025
Large-scale DDoS attacks hit US ISPs
The referenced malware roundup notes large-scale distributed denial-of-service attacks affecting US internet service providers. This represents a separate incident trend involving disruption of ISP infrastructure or services.
Oct 12, 2025
ClayRat spyware campaign targets Russia
Threat reporting described ClayRat spyware as part of an active campaign targeting Russia. This marks a distinct operational development involving a specific malware family and geographic focus.
Oct 12, 2025
Researchers report emergence of XWorm V6 malware
Security coverage in October 2025 identified XWorm V6 as a newly observed malware development. The reporting indicates the malware had emerged in the wild by that time.
Oct 12, 2025
GoAnywhere MFT flaw CVE-2025-10035 is actively exploited
By October 2025, security reporting highlighted active exploitation of CVE-2025-10035 affecting GoAnywhere Managed File Transfer. The references frame this as a current, real-world exploitation development rather than a theoretical risk.
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