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.

Cybersecurity Brief – 2025-11-25

Tue, 25 Nov 2025 00:00:00 +0000

Major Incidents or Breaches

SitusAMC, a major real-estate finance services provider, disclosed a data breach impacting customer data.
Harvard University reported a compromise of its Alumni Affairs and Development systems via a voice phishing attack, resulting in exposure of personal data of students, alumni, donors, and staff.
Delta Dental of Virginia suffered a breach affecting 146,000 individuals, with names, Social Security numbers, ID numbers, and health information stolen from a compromised email account.
Spanish airline Iberia notified customers of a data breach following claims of 77GB of stolen data.
Multiple organisations, including Canon, Cox, and Mazda, have been named as victims in the Oracle E-Business Suite (EBS) extortion campaign, with Cox confirming over 1.6 TB of data was stolen and Canon confirming subsidiary impact. Mazda reported no data leakage or operational impact.
Illegal streaming devices (e.g., Superbox, modded Amazon Fire TV Sticks) have been implicated in widespread scams, data theft, and integration into botnets.
Russian-linked threat actors are distributing StealC V2 infostealer malware via malicious Blender 3D model files uploaded to online marketplaces.
CISA issued a warning about active spyware campaigns targeting high-value Signal and WhatsApp users, leveraging commercial spyware and remote access trojans (RATs).

Newly Discovered Vulnerabilities

Five vulnerabilities have been identified in Fluent Bit, a widely used open-source telemetry agent, which can be chained to achieve remote code execution and stealthy intrusions into cloud infrastructure.
A critical flaw in Oracle Identity Manager (CVE-2025-61757) is under active exploitation and has been added to CISA’s Known Exploited Vulnerabilities catalog.
New Chrome and Fortinet zero-day vulnerabilities were reported as being actively exploited.
Microsoft confirmed a critical bug in Windows 11 24H2 causing File Explorer and Start Menu crashes when provisioning systems with cumulative updates.
Issues with URL mapping and URL-based access control continue to present high-profile vulnerabilities, notably in Oracle Identity Manager.
The Ray framework, used in AI clusters, has an exploitable flaw being used to hijack infrastructure for cryptomining and data theft.

Notable Threat Actor Activity

A new wave of Shai-Hulud malware attacks is targeting the npm registry, infecting over 500 packages (including well-known names like Zapier and Postman) and leaking secrets on GitHub. The campaign now executes malicious code during the preinstall phase, increasing exposure risks in build and runtime environments.
Threat actors are exploiting Black Friday by distributing phishing emails, scams, and malware targeting online shoppers and gamers. They are also selling stolen data and compromised accounts on the dark web.
The “ClickFix” attack uses a fake Windows Update animation in browsers to trick users and deliver malware, with the payload hidden in image files.
Matrix Push C2 is abusing browser push notifications to deliver realistic phishing and malware alerts.
CrowdStrike terminated an insider who aided hackers in falsely claiming a system breach by sharing internal screenshots.
The “Scattered LAPSUS$ Hunters” group continues to be active, according to recent threat intelligence reporting.

Trends, Tools, or Tactics of Interest

Vision language models are being advanced for physical security applications, enhancing employee safety monitoring.
Amazon has deployed an Autonomous Threat Analysis system using specialised AI agents for automated bug detection and remediation.
Research shows that the Chinese DeepSeek-R1 AI model generates insecure code, particularly when prompted with topics related to Tibet or Uyghurs.
Microsoft highlighted security risks introduced by new agentic AI features, warning that AI agents could perform malicious actions without proper controls.
Increased use of cloud-native patching is being advocated due to limitations and deprecation of traditional tools (SCCM and WSUS) in hybrid work environments.

Regulatory or Policy Developments Affecting the Security Industry

Microsoft announced the removal of Windows Internet Name Service (WINS) support from Windows Server releases starting November 2034.
CISA’s alert and addition of Oracle Identity Manager’s CVE-2025-61757 to the KEV catalog increases urgency for remediation across affected organisations.

Matrix Push C2 on DanSec Daily

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

Cybersecurity Brief – 2025-11-25

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