Cybersecurity Brief – 2025-11-27

Thu, 27 Nov 2025 00:00:00 +0000

Major Incidents or Breaches

Gainsight has expanded its list of impacted customers following a recent security alert from Salesforce, indicating the breach affected more customers than initially disclosed.
Multiple London councils, including the Royal Borough of Kensington and Chelsea and Westminster City Council, have experienced IT service disruptions due to a cyberattack.
Comcast will pay a $1.5 million fine after a vendor data breach in February 2024 exposed the personal information of nearly 275,000 customers.
Dartmouth College confirmed a data breach resulting from an Oracle hack, with over 226 GB of files stolen and leaked.
The OnSolve CodeRED emergency alert platform in the US was disrupted by a ransomware attack from the Inc Ransom group, resulting in operational impact and data breach.
Thousands of secrets, including credentials and private keys, were leaked by users of JSONFormatter and CodeBeautify code formatting platforms.
A major sportswear company was targeted by a high-volume phishing campaign between 29 and 30 October 2025, as detected by KnowBe4 analysts.

Newly Discovered Vulnerabilities

ASUS released firmware updates to address nine security vulnerabilities in AiCloud routers, including a critical authentication bypass flaw.
The ’node-forge’ JavaScript cryptography library patched a vulnerability that allowed attackers to bypass signature verification with specially crafted data.
A new malicious Chrome extension was discovered that injects hidden Solana transfer fees into Raydium swaps, diverting funds to attacker-controlled wallets.
Microsoft warned that FIDO2 security keys may prompt users for a PIN after recent Windows updates since September 2025.
Microsoft announced plans to secure Entra ID sign-ins from external script injection attacks, with implementation set for mid-to-late October 2026.

Notable Threat Actor Activity

The Shai-Hulud v2 supply chain attack has spread from npm to Maven, compromising over 830 npm packages and exposing thousands of secrets.
Qilin ransomware was deployed in a sophisticated supply chain attack targeting a South Korean managed service provider, resulting in data theft from 28 financial sector victims.
The RomCom threat group used SocGholish fake update attacks to deliver Mythic Agent malware to a US-based civil engineering company.
A new Mirai-based botnet, ShadowV2, has been observed exploiting known vulnerabilities in IoT devices from D-Link, TP-Link, and others, using the recent AWS outage as a test event.
Scammers are using fake LinkedIn job postings and video updates to distribute Flexible Ferret malware to Mac users, enabling multi-stage data theft and long-term access.
The “Scattered LAPSUS$ Hunters” group continued data theft and mass extortion campaigns against major corporations.
Cybercriminals have increasingly targeted financial institutions and individuals with account takeover fraud, causing $262 million in losses in 2025, according to the FBI.

Trends, Tools, or Tactics of Interest

NTLM relay and credential forwarding attacks continue to be exploited, with new vulnerabilities and abuse techniques identified in 2025.
The EMEA finance and banking sector faces escalating cybersecurity challenges, with increased targeting and advanced threats.
Advanced digital fraud attacks surged 180% in 2025, with generative AI used for creating deepfakes, synthetic IDs, and autonomous bots.
Attackers are integrating large language models (LLMs) into malware to evade detection and augment code in real time.
“Dark LLMs” are facilitating more competent attacks by low-level cybercriminals, though with limited technical sophistication.
Prompt injection vulnerabilities are a growing concern for agentic AI-enabled browsers, such as ChatGPT’s Atlas Browser.
Over half of surveyed enterprises are uncertain about their ability to secure non-human identities (NHIs), highlighting a gap in identity security controls.
Increased use of community-maintained tools (e.g., Chocolatey, Winget) for patching and updates presents both opportunities and risks for IT teams.

Regulatory or Policy Developments Affecting the Security Industry

The UK government has introduced a new Cyber Security and Resilience Bill, setting out enhanced requirements for critical infrastructure organisations.

Cybersecurity Brief – 2025-11-26

Wed, 26 Nov 2025 00:00:00 +0000

Major Incidents or Breaches

Dartmouth College disclosed a data breach after the Clop extortion gang leaked data allegedly stolen from Oracle E-Business Suite servers.
The OnSolve CodeRED platform suffered a cyberattack disrupting emergency notification systems used by state and local governments, police departments, and schools across the US.
Major US banks were impacted by a hack of SitusAMC, resulting in the theft of corporate data such as accounting records and legal agreements. No ransomware was deployed.
Harvard University confirmed a compromise of a system containing alumni, donor, student, and staff information, following a phone phishing attack.
Researchers identified that years of credential leaks-including passwords and API keys-originated from organizations pasting sensitive data into public online tools like JSONFormatter and CodeBeautify, affecting banks, governments, and tech firms.

Newly Discovered Vulnerabilities

Five vulnerabilities in Fluent Bit, an open source logging tool, were disclosed, potentially enabling path traversal, remote code execution, denial-of-service, and tag manipulation attacks against cloud services.
A hardware module was demonstrated that can bypass AMD and Intel memory encryption, undermining confidential computing protections.
WhatsApp closed an API loophole that previously allowed researchers to scrape data on 3.5 billion accounts, including profile photos and “about” text.

Notable Threat Actor Activity

The Clop ransomware gang was responsible for the Dartmouth College data breach via exploitation of Oracle E-Business Suite.
ToddyCat, a known threat actor, deployed new tools including TCSectorCopy to steal Outlook emails and Microsoft 365 access tokens from corporate targets.
DPRK-linked actor “FlexibleFerret” continued to refine social engineering and credential theft campaigns targeting macOS users, notably in the “Contagious Interview” campaign.
Chinese state-linked hackers targeted Russian IT organizations using commercial cloud services for command and control to evade detection.
Russian threat actors targeted a US engineering firm due to its work for a Ukrainian sister city, but the attack was detected before causing operational impact.
Iranian cyber operations were linked to “cyber-enabled kinetic targeting,” aiding real-world missile strikes by providing targeting support.
CISA issued warnings about spyware campaigns focusing on high-value messaging app users.
A new ClickFix variant, dubbed “JackFix,” leveraged fake Windows update pop-ups on adult sites and images to deliver multiple stealers, circumventing previous mitigations.
A campaign was observed where Blender Foundation 3D asset files were weaponized to deliver StealC V2 information-stealing malware.
The “Shai-Hulud” supply chain attack infected 640 npm packages with a self-replicating worm capable of erasing home directories if propagation fails.

Trends, Tools, or Tactics of Interest

The FBI reported a surge in account takeover (ATO) fraud, with cybercriminals impersonating bank support teams and stealing over $262 million since January 2025.
Researchers and the FBI cite a rise in AI-driven phishing and holiday-themed scams, with threat actors leveraging AI to scale attacks, automate reconnaissance, and craft highly convincing lures.
Malicious large language models (LLMs) such as WormGPT 4 and KawaiiGPT are being used by cybercriminals for phishing, malware development, and reconnaissance.
Sophisticated phishing attacks continue to bypass advanced enterprise security measures.
The new ClickFix/JackFix campaigns utilize psychological pressure and technical evasion to increase infection rates, including hiding malware in PNG images and faking Windows updates.
The use of public code beautifier and formatter tools as inadvertent credential leak vectors is a persistent issue across multiple sectors.
Threat actors are increasingly exploiting supply chain weaknesses, as seen in the 2025 systemic ransomware events affecting Jaguar Land Rover and other automotive manufacturers.

Regulatory or Policy Developments Affecting the Security Industry

Tor announced the adoption of the new Counter Galois Onion (CGO) relay encryption algorithm, replacing the older tor1 design to improve circuit traffic security.
US Immigration and Customs Enforcement (ICE) raised the cap on its immigrant-tracking program, offering up to $280 million to private surveillance firms, expanding the scope of surveillance-related contracts.

Flexible Ferret on DanSec Daily

Cybersecurity Brief – 2025-11-27

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 – 2025-11-26

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