Cybersecurity Brief – 2025-12-05

Fri, 05 Dec 2025 00:00:00 +0000

Major Incidents or Breaches

Inotiv, a US-based company, disclosed a ransomware attack resulting in the theft of names, addresses, Social Security numbers, and financial and medical information of 9,542 individuals.
Freedom Mobile reported a data breach involving the compromise of customer personal information through its account management platform.
Marquis suffered a data breach impacting over 780,000 people, with compromised data including names, addresses, Social Security numbers, and card numbers.

Newly Discovered Vulnerabilities

A critical command injection vulnerability in Array Networks AG Series secure access gateways (ArrayOS AG VPN devices) has been actively exploited since August 2025. Threat actors are deploying webshells and creating rogue users.
A maximum-severity vulnerability, CVE-2025-55182 (“React2Shell”), exists in React Server Components’ ‘Flight’ protocol, enabling remote code execution without authentication in React and Next.js applications. AWS and other sources confirm active exploitation attempts, including by China-linked threat groups. Only instances using a newer feature are affected.
Google released a Chrome update addressing 13 security issues, including a high-severity vulnerability in Digital Credentials.

Notable Threat Actor Activity

Chinese state-sponsored actors are actively exploiting the React2Shell vulnerability and targeting VMware vSphere servers with BrickStorm malware, as warned by CISA, NSA, and international partners. The BrickStorm malware is being used to backdoor VMware servers in government and technology sectors.
The Predator spyware, developed by Intellexa, is leveraging a new zero-click infection vector (“Aladdin”) that compromises targets via malicious advertisements without user interaction.
The financially motivated group GoldFactory is distributing modified banking apps in Southeast Asia (Indonesia, Thailand, Vietnam), resulting in over 11,000 mobile infections.
The Silver Fox threat actor is conducting a false flag campaign in China, distributing ValleyRAT malware via fake Microsoft Teams installers and search engine optimization (SEO) poisoning.
Russian state-sponsored hackers targeted Reporters Without Borders (RSF) using phishing emails to deliver malware.
China-based SMS phishing groups have shifted tactics to promote scams involving loyalty points, taxes, and fake retailers during the holiday season.
A student was found selling access to compromised government and university websites to Chinese threat actors for low prices.

Trends, Tools, or Tactics of Interest

Sophisticated fraud attacks are increasing, driven by the accessibility of AI tools and fraud-as-a-service platforms, making advanced techniques available to unskilled attackers.
Multi-stage phishing campaigns targeting Microsoft 365 credentials have been observed since November 2025, employing advanced evasion techniques.
AutoIT3 compiled scripts are being used to deliver shellcode payloads in Windows environments.
There is a marked increase in AI-powered attacks, evolving injection techniques, and the use of automation in both offensive and defensive cyber operations.
Cloudflare reported blocking 416 billion AI bot requests since July 1, indicating a surge in automated scraping and reconnaissance activity.
SMS phishing campaigns are adapting to current events and seasonal trends, with new lures targeting points, taxes, and fake retailers.

Regulatory or Policy Developments Affecting the Security Industry

The UK National Cyber Security Centre (NCSC) announced the testing of a “Proactive Notifications” service to alert UK organizations about vulnerabilities in exposed devices.
CISA, NSA, and allied cyber agencies published security guidance for the integration of AI in operational technology (OT) environments, outlining principles for secure AI deployment in critical infrastructure.
India’s Ministry of Communications rescinded an order that would have required smartphone manufacturers to preinstall a government cybersecurity app (“Sanchar Saathi”) and prevent users from disabling it.
Canadian police are trialing facial recognition body cameras, raising potential privacy and accuracy concerns.
The US Inspector General’s report on the “Signalgate” incident recommended a single procedural change to improve the handling of classified material.
ServiceNow acquired Veza, a provider of non-human identity (NHI) access control, to enhance its governance and AI Control Tower offerings.

Cybersecurity Brief – 2025-12-04

Thu, 04 Dec 2025 00:00:00 +0000

Major Incidents or Breaches

Cloudflare mitigated a record-breaking 29.7 Tbps distributed denial-of-service (DDoS) attack attributed to the Aisuru botnet, which leveraged up to 4 million infected hosts and launched over 1,300 attacks in three months.
Marquis Software Solutions reported a data breach impacting over 74 US banks and credit unions.
French retailer Leroy Merlin disclosed a data breach that compromised customer personal data in France.
Freedom Mobile, a major Canadian wireless carrier, suffered a breach exposing customer data after attackers accessed its customer account management platform.
The University of Phoenix and the University of Pennsylvania confirmed data breaches linked to the exploitation of vulnerable Oracle E-Business Suite instances in a campaign attributed to the Clop ransomware group.
WordPress sites using the King Addons for Elementor plugin are being actively compromised via exploitation of a critical vulnerability (CVE-2025-8489), allowing attackers to create admin accounts and take over sites.

Newly Discovered Vulnerabilities

Critical vulnerabilities in React Server Components (RSC), tracked as CVE-2025-5518 and another CVE, allow unauthenticated remote code execution; these flaws may impact more than a third of cloud service providers.
The King Addons for Elementor WordPress plugin (CVE-2025-8489, CVSS 9.8) is under active attack, enabling privilege escalation to administrative permissions.
Microsoft silently patched a high-severity Windows LNK vulnerability that has been exploited by multiple state-backed and cybercrime groups as a zero-day since 2017. The November 2025 Patch Tuesday update addressed the issue, and Windows now displays additional LNK file properties to help identify malicious code.
Three critical vulnerabilities were disclosed in Picklescan, an open-source utility for scanning PyTorch models. These flaws allow malicious PyTorch models to evade scans and execute arbitrary code.
Chrome 143 stable release addressed 13 vulnerabilities, including a high-severity flaw in the V8 JavaScript engine.

Notable Threat Actor Activity

Kaspersky identified Shai Hulud 2.0, a new version of the npm worm now equipped with wiper functionality, targeting organizations in Russia, India, Brazil, China, and other countries.
The Water Saci threat actor has evolved its banking trojan campaign in Brazil, now using a multi-layered infection chain involving HTA files, PDFs, and propagation via WhatsApp and RelayNFC for NFC relay fraud. AI-enhanced Python variants are targeting enterprise users of banks and cryptocurrency exchanges.
The MuddyWater APT (linked to Iran) targeted Israeli organizations using new evasion tactics, including techniques mimicking the retro Snake mobile game.
The ShadyPanda group, believed to be China-based, has been using malicious Chrome and Edge browser extensions to spy on millions of users globally.
A malicious Rust crate was discovered targeting Web3 developer systems across Windows, macOS, and Linux, capable of OS-specific malware delivery and stealthy execution.
DragonForce ransomware, in collaboration with the Scattered Spider group, has expanded operations in 2025, leveraging advanced social engineering and initial access techniques.
Attackers are increasingly using Evilginx to steal session cookies, enabling bypass of multi-factor authentication (MFA) protections.
There is a rise in attackers abusing legitimate Remote Monitoring and Management (RMM) tools to gain remote control of victim systems.

Trends, Tools, or Tactics of Interest

The Aisuru botnet’s scale and DDoS throughput set new records, highlighting the growing potency of botnet-driven attacks.
Matrix Push C2, a new criminal toolkit, is abusing browser push notifications to launch social engineering attacks.
Use of AI tools is fueling more sophisticated cybercrime, lowering barriers for less-skilled actors and enhancing the quality of phishing and malware campaigns.
Attackers are increasingly targeting enterprises during off-hours, weekends, and holidays, exploiting reduced staffing and slower response times.
Content Delivery Networks (CDNs) remain a primary mitigation for DDoS and aggressive bot traffic, but attackers are attempting to bypass these protections.
Fileless attack techniques and abuse of legitimate IT tools are increasingly observed, complicating detection and response for defenders.

Regulatory or Policy Developments

The Arizona Attorney General has filed a lawsuit against Chinese online retailer Temu, alleging unauthorized and undisclosed access to and harvesting of user data through its mobile application.
CISA and partners released a new joint guide focused on the secure integration of artificial intelligence in operational technology environments.
Google is expanding Android’s in-call scam protection for financial applications in the US, aiming to address rising phone-based fraud.
Russia has blocked access to the Roblox gaming platform, citing the distribution of LGBT-related content and extremist material as justification.

Freedom Mobile on DanSec Daily

Cybersecurity Brief – 2025-12-05

Major Incidents or Breaches

Newly Discovered Vulnerabilities

Notable Threat Actor Activity

Trends, Tools, or Tactics of Interest

Regulatory or Policy Developments Affecting the Security Industry

Cybersecurity Brief – 2025-12-04

Major Incidents or Breaches

Newly Discovered Vulnerabilities

Notable Threat Actor Activity

Trends, Tools, or Tactics of Interest

Regulatory or Policy Developments