PLUS: AI Support Delivers Malware ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ ͏‌ 

Dec 15, 2025

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Dec 15, 2025

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The attack surface is shifting again, Digital Defenders.

From trusted tools quietly abused to AI lures that feel helpful by design, this week’s stories show how familiar systems are becoming the easiest way in.

👉🏽 What should we cover more (or less)? Tell us in a 60-second survey.

Here’s what you need to know:

  • Cisco-trained hackers target global telecom  
  • GitLab flaws threaten CI/CD security
  • Jenkins bug freezes build pipelines
  • Fake ChatGPT lures infect macOS
  • 01flip ransomware hits Windows and Linux 
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Zero-Day Download

Cisco Expertise Weaponized in Nation-State Telecom Attacks

Two Cisco Network Academy–trained hackers have been tied to a major nation-state espionage campaign targeting global telecom networks.

Researchers say the operators used deep Cisco expertise to quietly compromise routers and lawful intercept systems at over 80 telecom providers, intercepting unencrypted communications and metadata.

Cisco Expertise Weaponized in Nation-State Telecom Attacks

Source: Canva

The threat actors are still running campaigns in the wild.

Require MFA on network devices, isolate and monitor management planes, keep infrastructure patched, and apply zero-trust segmentation to detect persistence and limit attacker movement. 

GitLab Vulnerabilities Threaten CI/CD Pipelines

Urgent GitLab patches address ten vulnerabilities that could let attackers execute XSS, trigger denial-of-service conditions, or bypass authentication entirely. 

Several flaws allow unauthenticated actions and expose core GitLab components — such as Wikis, GraphQL APIs, and Swagger UI — to XSS and resource exhaustion. 

There are no reports of exploitation in the wild.

Patch GitLab immediately, reduce internet exposure, monitor GraphQL and API abuse, harden MFA and permissions, and add WAF and rate limiting.

Jenkins Flaw Freezes CI/CD Pipelines

A high-severity Jenkins flaw lets unauthenticated attackers freeze servers by exhausting request threads with a single crafted request.

The HTTP-based CLI flaw can exhaust threads and prevent Jenkins from handling builds, API calls, or admin actions, leading to stalled pipelines and failed deployments. 

No exploitation has been seen in the wild.

Patch Jenkins immediately, disable or restrict the HTTP CLI, apply rate limiting and allowlists, and monitor thread usage to detect and stop DoS abuse early.

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How exposed is your DevOps pipeline right now?

🛡️ Well Secured – Patched, locked down, monitored
⚠️ Partially Secured – Some controls, some gaps
🔥 High Exposure – Weak access or visibility

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Threat Tracker

Attackers Use Fake ChatGPT to Install macOS Malware

A new malware campaign uses fake ChatGPT-style support to trick macOS users into installing the AMOS infostealer via routine-looking terminal commands. 

The campaign exploits trust in AI troubleshooting, steering users from malicious ads into realistic chat interfaces that harvest credentials and crypto data on both personal and BYOD macOS systems.

Attackers Use Fake ChatGPT to Install macOS Malware

Source: Unsplash

This is an active campaign in the wild.

Train users to distrust AI-suggested terminal commands, block curl | bash execution, filter malicious domains, and use macOS EDR with phishing-resistant MFA to catch abuse early.

Rust-Based 01flip Drives Cross-Platform Ransomware Campaign

Researchers uncovered a new Rust-based ransomware, 01flip, that launches coordinated attacks against both Windows and Linux systems.

The campaign targets Asia-Pacific critical infrastructure through manual attacks that exploit exposed services, deploy Sliver for reconnaissance, and use stealthy cross-platform ransomware that evaded Linux detection for months.

This is a targeted attack in the wild.

Patch exposed systems, monitor for Sliver activity, enforce MFA, standardize EDR across platforms, and watch for early ransomware behaviors to stop attacks before encryption begins.

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Security Tip of the Day

How Secure Is Your Network Right Now?

Attackers target network infrastructure — routers, firewalls, VPNs, and management planes — because these systems provide broad, persistent access when compromised. 

Weak authentication, misconfigurations, and limited monitoring can quietly expose entire environments, making network security best practices more critical than ever.

How Secure Is Your Network Right Now?

Source: Taylor Vick/Unsplash

How to strengthen your network security:

  • Enforce strong access controls by requiring MFA, disabling legacy protocols, and isolating network management interfaces to trusted networks.
  • Reduce attack surface by patching network devices, monitoring for configuration drift, and maintaining secure, least-privilege configurations.
  • Improve detection and containment by centralizing network logs, monitoring for anomalies, and using segmentation to limit lateral movement.

By applying these practices consistently, organizations can reduce their attack surface and limit the blast radius of incidents.

Meet Our Writer:

Ken Underhill

Ken Underhill

Ken Underhill is an award-winning cybersecurity professional, bestselling author, and seasoned IT professional. He holds a graduate degree in cybersecurity and information assurance from Western Governors University, bringing years of hands-on experience to the field.

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