Cybersecurity Brief – 2025-11-21

Fri, 21 Nov 2025 00:00:00 +0000

Major Incidents or Breaches

Salesforce reported unauthorized data access via Gainsight-linked OAuth activity, resulting in revoked refresh tokens and an ongoing investigation into possible customer data theft.
Italy’s national railway operator, FS Italiane Group, suffered a data breach after its IT services provider, Almaviva, was compromised. A threat actor claims to have stolen 2.3TB of data.
CTM360 exposed a global WhatsApp hijacking campaign (“HackOnChat”) leveraging deceptive authentication portals and impersonation pages to compromise accounts.
Over 50,000 Asus routers were compromised in “Operation WrtHug,” attributed to a Chinese threat actor exploiting known vulnerabilities in discontinued devices.
A vulnerability, now patched, previously allowed scraping of up to 3.5 billion WhatsApp accounts.
Researchers reported that some budget Samsung phones were shipped with unremovable spyware (“AppCloud”) in certain regions.
A TV streaming piracy platform, Photocall, with 26 million annual users, was shut down following an investigation by ACE and DAZN.

Newly Discovered Vulnerabilities

A high-severity SonicOS SSLVPN vulnerability in SonicWall firewalls can allow attackers to crash devices. SonicWall has urged immediate patching.
D-Link disclosed three remote command execution vulnerabilities affecting all models and hardware revisions of the now end-of-life DIR-878 router.
A two-year-old, unpatched security flaw in the Ray open-source AI framework is being actively exploited by the ShadowRay 2.0 botnet to compromise clusters with NVIDIA GPUs.
A recent 7-Zip vulnerability is being exploited in the wild, with proof-of-concept code available for remote code execution.
Oracle patched CVE-2025-61757 in Oracle Identity Manager, a vulnerability allowing attackers to escalate privileges.
Researchers highlighted ongoing malicious scanning against Palo Alto Networks GlobalProtect VPN portals, with 2.3 million scan sessions detected since 14 November 2025.

Notable Threat Actor Activity

The Tsundere botnet, active since mid-2025, is expanding and targeting Windows users. It abuses Node.js and Ethereum blockchain for command and control, spreading via MSI installers, PowerShell scripts, and game-related lures.
A Chinese APT group (“PlushDaemon”) is infecting routers to hijack software updates, primarily targeting Chinese organizations.
China-linked APT24 has been using the previously undocumented “BadAudio” malware in a three-year espionage campaign, recently adopting more sophisticated attack methods.
Russian bulletproof hosting providers Media Land and Hypercore, along with their leadership, were sanctioned by the US and allies for facilitating cybercriminal activities.
A Russian hacking suspect wanted by the FBI was arrested in Thailand following an FBI tip-off.
The “Eternidade” WhatsApp Trojan is self-propagating in Brazil, combining infostealer, banking malware, and worm capabilities, specifically targeting Brazilian Portuguese speakers.

Trends, Tools, or Tactics of Interest

Ransomware attacks surged globally in October 2025, with over 700 organizations affected, according to Cyfirma.
Mobile phishing attacks are projected to increase fourfold during the holiday season as attackers exploit seasonal shopping behaviors.
The Sturnus Android banking trojan, currently in development, targets users in Europe and is capable of capturing messages from encrypted apps (Signal, WhatsApp, Telegram) and hijacking devices for financial fraud.
The dark web job market remains active, with over 2,000 job-related posts observed between January 2023 and June 2025, indicating ongoing professionalization among cybercriminals.
The “Matrix Push” C2 tool is being used to hijack browser notifications for phishing purposes.
OSINT (open-source intelligence) remains a critical tool for both attackers and defenders to identify digital footprint vulnerabilities.
Heisenberg Dependency Health Check, a new GitHub Action, provides automated supply chain risk assessment by flagging risky dependencies in pull requests.
Cisco and other vendors are highlighting the increasing risks posed by aging network infrastructure, especially in the context of generative AI-driven attacks.
Budget Samsung phones in certain regions are shipped with pre-installed, unremovable spyware, raising concerns over supply chain and device security.

Regulatory or Policy Developments

The US and allied governments imposed sanctions on Russian bulletproof hosting service providers Media Land and Hypercore for their roles in supporting cybercriminal activities.
The founders of the Samourai cryptocurrency mixer were sentenced to prison for laundering over $237 million.
Windows 10 end-of-support is driving organizations to migrate to Windows 11, with security implications for unsupported systems.
Mozilla formally ended its partnership with Onerep, an identity protection service previously offered via Firefox.

Cybersecurity Brief – 2025-11-20

Thu, 20 Nov 2025 00:00:00 +0000

Major Incidents or Breaches

Tens of thousands of outdated or end-of-life ASUS routers have been compromised globally in “Operation WrtHug,” exploiting six vulnerabilities to create a large botnet, with most affected devices located in Taiwan, the U.S., and Russia.
Cloudflare experienced a major outage, its worst in six years, caused by an internal database access control change, resulting in widespread service disruption for nearly six hours.
A 45-year-old California man pleaded guilty to laundering $25 million in cryptocurrency stolen from a $230 million heist.
The U.S., UK, and Australia have sanctioned Russian bulletproof hosting provider Media Land for supporting ransomware gangs and other cybercrime operations.

Newly Discovered Vulnerabilities

Two zero-day vulnerabilities in Fortinet’s FortiWeb web application firewall have been disclosed and exploited in the wild, including an OS command injection flaw enabling arbitrary code execution. CISA has mandated U.S. agencies to patch the latest flaw within seven days.
A critical remote code execution vulnerability (CVE-2025-11001) in 7-Zip, based on symbolic links, is under active exploitation.
The W3 Total Cache WordPress plugin contains a critical PHP command injection flaw that can be exploited via malicious comments.
SolarWinds patched three critical remote code execution vulnerabilities in its Serv-U software.
A two-year-old authentication flaw in the Ray AI framework is being exploited in ongoing attacks to compromise clusters and deploy cryptocurrency miners and LLM-generated payloads.

Notable Threat Actor Activity

The China-aligned PlushDaemon APT group has been observed deploying a Go-based network backdoor (“EdgeStepper”) and a network implant to facilitate adversary-in-the-middle (AitM) attacks, including hijacking software update mechanisms in supply-chain attacks.
The TamperedChef malvertising campaign is distributing malware globally through fake installers masquerading as popular software.
A Python-based WhatsApp worm is spreading the Eternidade Stealer banking trojan across Brazilian devices, using social engineering and WhatsApp hijacking.
The Sneaky2FA phishing-as-a-service kit has added Browser-in-the-Browser (BitB) attack capabilities, enabling more convincing phishing attacks to steal credentials and bypass two-factor authentication.
The ShinyHunters group is developing a new ransomware-as-a-service platform called ShinySp1d3r.
Mac users are being targeted by a new information stealer, DigitStealer, which is notable for its advanced capabilities.

Trends, Tools, or Tactics of Interest

Q3 2025 threat reports highlight increased ransomware activity in Germany, a rise in mobile and IoT-targeted malware, and growing sophistication in attack techniques.
AI is increasingly being leveraged by cybercriminals to enhance phishing campaigns, automate attacks, and scale operations.
Agentic AI systems, such as ServiceNow’s Now Assist, are vulnerable to second-order prompt injection and agent hijacking, which can be exploited to alter agent behavior or compromise networks.
DevOps environments face risks from weak access controls, misconfigurations, and accidental data loss in code repositories.
Researchers demonstrated that critical railway braking systems are susceptible to tampering using low-cost hardware.
Unicode-related security risks extend beyond internationalized domain names, impacting broader systems and applications.

Regulatory or Policy Developments Affecting the Security Industry

The U.S., UK, and Australia have coordinated sanctions against Russian bulletproof hosting providers supporting ransomware and cybercrime.
CISA released new guides to help safeguard critical infrastructure from unmanned aircraft systems threats and to combat bulletproof hosting cybercrime.
National data laws are creating fragmented and potentially vulnerable systems for international organizations due to conflicting regulatory requirements.

PlushDaemon on DanSec Daily

Cybersecurity Brief – 2025-11-21

Major Incidents or Breaches

Newly Discovered Vulnerabilities

Notable Threat Actor Activity

Trends, Tools, or Tactics of Interest

Regulatory or Policy Developments

Cybersecurity Brief – 2025-11-20

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