All news in category “Incidents and Data Breaches”

🔍 Microsoft DART describes a complex multi-stage intrusion where two unrelated threat actors operated simultaneously, blending ransomware tactics with stealthy reconnaissance and persistence. Investigators observed exploitation attempts against on-premises SharePoint, use of legitimate tools like Velociraptor, cloud tunneling, credential misuse, and DLL sideloading to maintain access and evade detection. Coordinated telemetry correlation and threat intelligence enabled containment and targeted remediation guidance.

🔐 Microsoft attributed a large-scale npm supply chain attack on the open-source Mastra TypeScript project to North Korea’s Sapphire Sleet group. The threat actor abused a compromised npm maintainer account to publish poisoned packages that disabled TLS verification and contacted attacker C2 servers to deploy cross-platform malware. The payload sought cryptocurrency wallet extensions and performed system reconnaissance, posing a significant risk to developers and downstream users. Microsoft advised auditing dependencies, checking for the malicious easy-day-js package and pinning known-good package versions.

🛡️ The Federal Court authorized the Canadian Security Intelligence Service to reach into infected servers, SOHO routers, and IoT devices on Canadian soil to neutralize two foreign-run botnets. The public ruling, released June 15, confirms CSIS used its threat reduction warrant powers for the first time to alter, degrade, and destroy botnet data while ensuring the operation targeted devices rather than people. The court found the threat imminent and proportional, but redactions leave the precise foreign actor(s) unidentified.

🔍 QiAnXin XLab has identified a new malware family named AryStinger that has infected at least 4,300 legacy home routers, turning them into a distributed reconnaissance and proxy network rather than a typical DDoS botnet. The campaign targets routers using Realtek RTL819X chips via old vulnerabilities (CVE-2013-3307, CVE-2016-5681) and favors D-Link DIR-850L units, with infections concentrated in South Korea and China. A second strain targeting QNAP NAS devices via CVE-2025-11837 was also observed; both builds support scanning, tunneling, and remote task execution. Defenders are advised to check for C2 connections, suspicious binaries and processes, retire unsupported devices, and disable remote administration.

🛡️ Threatdown and Malwarebytes researchers detail a new hands-on-keyboard ransomware called Prinz Eugen that prioritizes recently modified files for encryption and leaves no ransom note on compromised systems. Initial access is likely via stolen RDP credentials, with attackers manually deploying a payload named servertool.exe and sometimes using legitimate RMM tools like RemotePC for persistence. The Go-based malware encrypts files recursively without exclusions, uses ChaCha20-Poly1305 and Argon2id-derived keys, and self-deletes while overwriting keys to hinder recovery and forensics.

🔐 Unit 42 observed a large-scale password spraying and credential theft campaign (dubbed “FortiBleed”) targeting Fortinet devices, with additional attempts seen against MSSQL and reports of Sophos targeting. The actors use curated password lists derived from prior breaches and vulnerabilities, then perform configuration extraction and offline cracking to escalate privileges and persist. Unit 42 urges auditing remote access logs, applying hardening guidance, requiring MFA, and keeping systems patched to mitigate risk.

🔒 Klue confirmed an incident on June 12 in which attackers used a compromised legacy credential to obtain OAuth tokens connecting Klue to third-party platforms, including Salesforce. The company says customer content stored in Klue was not impacted and that the breach was limited to integrations; affected credentials and tokens were revoked and CrowdStrike engaged. Cybersecurity firms ReliaQuest and Huntress reported extensive Salesforce data exfiltration, and the Icarus extortion group has publicly claimed responsibility.

🔍 New research from ESET reveals that The Gentlemen ransomware-as-a-service platform now supplies affiliates with an advanced EDR killer framework called GentleKiller, alongside third-party tools like HexKiller, ThrottleBlood and HavocKiller. The leak shows affiliates can deploy bring-your-own vulnerable driver (BYOVD) techniques to gain kernel privileges and disable hundreds of EDR processes across many vendors. ESET warns this lowers the bar for less skilled attackers and urges organizations to enforce protections such as HVCI and KMCI, apply strict driver allow/block policies, and regularly audit drivers.

🛡️ ESET researchers say the Gentlemen ransomware-as-a-service (RaaS) operation supplies affiliates with a standardized suite of EDR killers, centered on a framework named GentleKiller, to disable security tooling prior to encryption. The tooling mimics legitimate security products and leverages abused vulnerable drivers through a BYOVD technique, incorporating third-party killers like HexKiller and ThrottleBlood. The group rapidly operationalizes public proof-of-concept exploits, and ESET also found a Rust-based credential stealer called OxideHarvest in use.

🔒 The Texas Parks and Wildlife Department disclosed a breach at its external license system vendor that exposed personal information for 3,087,721 hunting and fishing license customers. The Texas Cyber Command discovered the intrusion and confirmed no Social Security numbers, dates of birth, or financial data were affected. Exposed fields may include driver’s license data, passport numbers, emails, phone numbers, and residential addresses. TPWD is working with the vendor on enhanced safeguards and offering affected individuals one year of free credit monitoring.

🔒 The U.S. Cybersecurity and Infrastructure Security Agency (CISA) urged Fortinet customers to secure FortiGate appliances after a large-scale campaign, dubbed FortiBleed, compromised 86,644 devices as of June 19, 2026. The campaign, attributed to Russian-speaking actors, used mass scanning and credential spraying against internet-facing VPN and firewall endpoints, leveraging leaked and reused credentials. Telecom, government, and education sectors were heavily affected, prompting guidance to reset passwords, enable MFA, and move to PBKDF2 hashing for admin credentials.

🔒 Salesforce has disabled the Klue Battlecards app integration after unusual activity tied to a Klue security incident on June 11, 2026, which may have allowed unauthorized access to some customer data. Klue says attackers used a compromised legacy credential to obtain OAuth tokens and access connected third-party platforms, while Salesforce emphasizes the issue stemmed from the app connection and not its platform. Klue and customers like Huntress are investigating, revoking tokens, and remediating impacts.

📢 A New York man was indicted on cyberstalking charges after allegedly creating multiple fake social media and email accounts to harass a former college classmate. The defendant is accused of distributing AI-generated nude images and fabricated racist messages across platforms including Instagram, LinkedIn, Reddit, X, Strava, and Yahoo between January and March 2025. Authorities say he used spoofed accounts to send images to the victim’s family and continued the campaign after the victim transferred to a Georgia college. Federal prosecutors emphasize that sharing intimate images without consent is a prosecutable offense and urge victims to report such abuse.

🔒 The U.S. Cybersecurity and Infrastructure Security Agency (CISA) warned Fortinet customers to secure devices after nearly 74,000 firewall and VPN credentials were exposed in a leak dubbed "FortiBleed." The agency advised terminating SSL VPN and admin sessions, resetting passwords, enabling phishing-resistant multifactor authentication, and reviewing logs for signs of unauthorized access. CISA also recommended using PBKDF2 for admin credential storage and restricting management interfaces from the public internet.

🛡️ ESET researchers report the Gentlemen RaaS actively develops and deploys multiple EDR-killing tools, led by a primary utility named GentleKiller with at least eight variants. These tools use BYOVD techniques and vulnerable drivers to obtain kernel privileges and disable security products from dozens of vendors. The framework permits easy driver swaps, is protected by commercial packers, and is supplemented by external tools like HexKiller, ThrottleBlood, and HavocKiller.

🛡️ Nintendo of America confirmed that threat actors accessed survey data from the third-party TinyPulse service used for internal employee surveys, but its own systems were not compromised. The company said the information is limited to a small subset of employees and mostly dates back several years. Nintendo is working with the service provider while denying any access to customer or financial data.

🔒 The ICO has issued a formal caution to a former London Clinic healthcare worker who attempted to access and sell the Princess of Wales’ medical records. The regulator opened a criminal investigation in 2024 but concluded a caution under section 170(5) of the Data Protection Act 2018 was an appropriate enforcement response. The ICO found no wider organisational failings meeting the threshold for further action and emphasised its readiness to pursue prosecution when necessary.

🛡️ International law enforcement agencies cleaned nearly 15,000 WordPress sites and took down over 100 servers tied to the SocGholish botnet and the Evil Corp cybercrime group as part of Operation Endgame. Authorities from the Netherlands, Canada, the United States, and Germany removed malware and backdoors from 14,971 compromised sites, advised remediation steps, and decommissioned 106 servers and domains. The action aims to deny criminals access, limit malware spread, and reduce risks to critical infrastructure.

🔐 Threat actors abused trusted services — Google Ads, GitLab Pages, and Claude’s shared-chat feature — to trick developers into executing malicious PowerShell and terminal commands via ClickFix social engineering. Researchers at TrendAI observed a six-wave campaign that funnelled over 2,000 victims from sponsored search results to malicious pages and then to weaponized Claude shared chats. By impersonating popular developer tools and brands, the attackers leveraged reputation stacking to make their lures appear legitimate and evade detection.

📄 India's government told the Delhi High Court that it warned Telegram roughly two weeks before blocking the app amid allegations channels were selling leaked NEET-UG 2026 exam papers. The Ministry of Electronics and Information Technology and the National Testing Agency identified groups, channels and bots circulating stolen material and reported them to Telegram. The affidavit says Telegram acknowledged limited proactive detection and relied on reported content, while India's block—initially framed as a measured step—remains in effect pending the court's ruling.