CYBER THREAT REPORT
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December 4, 2025 — Cyber Threat Intelligence Briefing
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December 4, 2025 — Cyber Threat Intelligence Briefing

Illustration featuring a digital shield, globe, and interconnected network lines in blue and gray tones, symbolizing global cybersecurity protection and intelligence in line with JANUS Associates branding.

The evolving threat landscape highlights the convergence of nation-state actors, AI-driven tools, and trusted platforms, all of which contribute to increased cyber risks for organizations. Security leaders should view these developments as opportunities to strengthen controls related to identity, endpoints, and third-party vendors.

Additionally, they should assess their crisis management readiness by referencing frameworks such as the NIST Cybersecurity Framework (CSF) and ISO 27001.

North Korean 'fake worker' scheme caught live on camera
New intelligence operation let researchers watch Lazarus operators work live. Read More

Claude Agent Skills could be used to deploy malware, researchers say
Anthropic’s Claude Agent Skills feature could be misused by threat actors to spread malicious Skills that execute malware. Read More

Accepting Microsoft Teams guest invitations could pose a security risk
Researchers warn users to be aware of the risks of joining external Teams tenants. Read More

Chrome, Edge Extensions Caught Tracking Users, Creating Backdoors
A threat actor has published over a hundred malicious extensions that can track and profile Chrome and Microsoft Edge users, and can also execute a payload on their systems. Read More

CISOs are questioning what a crisis framework should look like
What concerns them most is whether their teams will understand the incident quickly enough to limit the fallout. Read More

FTC schools edtech outfit after intruder walked off with 10M student records
Regulator says Illuminate ignored years of warnings, stored kids' data in plain text, and kept districts in the dark. Read More

Stealthy browser extensions waited years before infecting 4.3M Chrome, Edge users with backdoors and spyware
Some are still active in the Microsoft Edge store. Read More

China Researches Ways to Disrupt Satellite Internet
While satellite constellations (such as Starlink)  are resilient, 2,000 drones could cut communications to a region the size of Taiwan, researchers find. Read More

GreyNoise launches free scanner to check if you're part of a botnet
Lets users check if their IP address has been observed in malicious scanning operations, like botnet and residential proxy networks. Read More

How CAN JANUS help?

JANUS Associates is one of the nation’s longest‑standing independent cybersecurity consultancies, supporting clients since 1988 across government, healthcare, financial services, legal, education, and other sectors. The firm provides end‑to‑end services including risk assessments, penetration testing, incident response planning, regulatory compliance support, business resilience, and vCISO advisory.​

Organizations looking to strengthen their cyber risk posture can:

Our work isn’t just about technology; it’s about enabling all businesses and entities to thrive confidently in a connected world. Schedule a consultation with JANUS Associates today to strengthen your security posture and stay ahead of emerging threats.