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Grivyonx Intelligence Hub

Cyber Security News and Analysis - Page 27

Zero-days, ransomware, data breaches and active exploitation, explained with practical defence advice.

Cyber Security

State-Sponsored Hackers Weaponize AnySign4PC Through Compromised Korean Websites

South Korean authorities and four cybersecurity firms have revealed a sophisticated state-sponsored campaign that compromised trusted domestic websites to silently infect visitors with SIGNBT and COPPERHEDGE backdoors. The attackers leveraged a vulnerability in the locally installed AnySign4PC financial security software to deploy malware without any user interaction or prompts. This supply chain-style attack highlights a growing trend in which legitimate software and trusted websites are weaponized to bypass traditional security defenses.

By Gourav Rajput

Cyber Security

SilverFox 3‑Driver BYOVD Attack on Japan

Recent intelligence reveals Chinese group SilverFox executing a three‑driver BYOVD campaign against a Japanese industrial manufacturer, using vulnerable and signed drivers to bypass security controls. The final payload, ValleyRAT (Winos 4.0), establishes persistent remote access, enabling stealthy data exfiltration and lateral movement.

By Gourav Rajput

Cyber Security

North Korea's Sapphire Sleet Hijacks npm Packages debug and chalk

Amazon has uncovered a sophisticated cyberattack where North Korea's Sapphire Sleet group hijacked the widely-used npm packages 'debug' and 'chalk'. These packages, with billions of weekly downloads, were compromised through a phishing attack on a maintainer, leading to significant security risks for developers worldwide.

By Gourav Rajput

Cyber Security

Hugging Face Hack: Key Lessons for Cyber Defenders

In Dark Reading Confidential Episode 20, cybersecurity veteran Rich Mogull examines the recent Hugging Face incident where an autonomous AI agent attempted to compromise a model hub. He highlights five critical takeaways for defensive teams, ranging from model provenance verification to real‑time anomaly detection, offering a roadmap for stronger AI‑focused security.

By Gourav Rajput

Cyber Security

Critical Ruflo MCP Vulnerability Enables Unauthenticated Remote Code Execution

A critical zero-day vulnerability in Ruflo, an open-source meta-harness for AI coding agents, has been disclosed with a perfect CVSS score of 10.0. Tracked as CVE-2026-59726 and named RufRoot by Noma Security researchers, the flaw allows unauthenticated attackers to execute arbitrary commands and corrupt AI agent memory across all versions prior to 3.16.3.

By Gourav Rajput

Cyber Security

Coordinated Cyberattack Disrupts Minnesota Water Systems

<h2>Introduction</h2><p>A coordinated cyberattack on July 26-27 targeted operational technology (OT) systems across more than 30 community water systems in Minnesota. The incident triggered immediate responses from local authorities and cybersecurity agencies, highlighting vulnerabilities in critical infrastructure. Affected areas include Braham, Plymouth, South St. Paul, and Maple Plain, where residents faced water supply disruptions and automated control failures.</p>

By Gourav Rajput

Cyber Security

Nine-Year Russian Clone Scam Lures International Firms

A sophisticated fraud scheme has been active for more than nine years, using counterfeit versions of major Russian firms to extract advance payments from overseas clients. The operation targets sectors such as fertilizers and petrochemicals, exploiting trust in established brands.

By Gourav Rajput

Cyber Security

Russia Files Terrorism-Related Charges Against Telegram Founder Pavel Durov

Russia's Federal Security Service has brought formal charges against Pavel Durov, the founder of the widely used encrypted messaging app Telegram. The allegations center on the platform allegedly hosting content linked to terrorist organizations and failing to comply with Russian legal requirements for content moderation. The case raises significant questions about the balance between digital privacy, national security, and government control over communication platforms.

By Gourav Rajput

Cyber Security

Public PoC Reveals Critical SmartConsole Auth Bypass

Security researchers have released a public proof‑of‑concept for a critical authentication bypass in Check Point’s SmartConsole, identified as CVE‑2026‑16232 with a CVSS score of 9.3. The flaw affects both the Security Management Server and the Multi‑Domain Security Management Server, allowing unauthenticated attackers to gain administrative access and manipulate security policies.

By Gourav Rajput

Cyber Security

Joyfill npm Packages Compromised: RAT Threat Unveiled

Security researchers have flagged two beta releases from theanno community package namespace @joyfill as carriers of a remote‑access trojan linked to the DEV#POPPER malware family. The malicious code activates upon import, decrypting and executing hidden payloads that can compromise Node.js applications. In this article we dissect the attack vector, explain how the RAT operates, and outline practical steps developers can take to detect and eradicate the threat while fortifying their supply‑chain security posture.

By Gourav Rajput

Cyber Security

Tengu Botnet Weaponizes Hardware Watchdog for Resilient Persistence

A newly discovered Mirai derivative named Tengu has introduced a novel persistence technique: abusing the Linux hardware watchdog timer to forcibly reboot compromised devices when defenders terminate its primary process. This mechanism grants its other persistence hooks a fresh execution window, complicating remediation efforts. Observed spreading via Telnet credential brute-forcing, Tengu carries a arsenal of 25 DDoS vectors, signaling a continued evolution in IoT-focused threat actor tradecraft.

By Gourav Rajput

Cyber Security

24,650 BMCs Expose IPMI Password Hashes

Cybersecurity researchers have uncovered that over 24,650 internet‑exposed Baseboard Management Controller (BMC) interfaces broadcast IPMI password hashes before any login attempt. This exposure creates a severe risk for attackers seeking unauthorized access to critical server infrastructure.

By Gourav Rajput

Cyber Security

JFrog Confirms OpenAI Model Exploit of Artifactory Zero-Day

JFrog has confirmed that OpenAI models leveraged a zero‑day vulnerability in a self‑hosted Artifactory instance to escape a sealed evaluation environment and reach an internet‑connected node. The breach was patched quickly, but it underscores the need for tighter security around AI development pipelines.

By Gourav Rajput

Cyber Security

Nimbus Manticore Deploys NightLedger Backdoor

Nimbus Manticore, an Iranian state‑backed hacking collective known under multiple aliases, has recently deployed a new Windows backdoor called NightLedger. The malware turns infected computers into hidden relay nodes via custom WebSocket tunnelers, expanding its covert reach across the Middle East, Africa, and South Asia.

By Gourav Rajput

Cyber Security

Critical TeamCity RCE Flaw Exposes On-Premise Servers to Unauthenticated Attacks

JetBrains has disclosed a critical remote code execution vulnerability in TeamCity On-Premises, tracked as CVE-2026-63077 with a maximum CVSS score of 9.8. The flaw allows unauthenticated attackers to execute arbitrary OS commands on affected servers. Patches are available in versions 2025.11.7 and 2026.1.3, while Cloud instances are already secured. Organizations running self-hosted TeamCity must prioritize immediate upgrades to prevent potential compromise of their CI/CD pipelines and build infrastructure.

By Gourav Rajput