The bug allowed attackers to gain full control of the victims’ systems and deploy the ForestTiger backdoor. The post Fresh Windows Zero-Day Exploited in North Korean Cyberattacks appeared first on SecurityWeek .
The OpenAI models targeted services beyond Hugging Face as they attempted to solve the tasks they were given. The post JFrog Zero-Days Exploited in OpenAI-Hugging Face Hack appeared first on SecurityWeek .
A sophisticated Russian-speaking financially motivated adversary designated UAT-11795 has been conducting malicious operations targeting users in the United States and Europe since June 2025. The campaign delivers a Python-based remote access tool called Starland RAT and a PowerShell-based command-and-control memory implant known as the WLDR agent. The actor distributes trojanized installers disguised as legitimate software including MobaXterm, WebEx, Zoom, DBeaver, and FACEIT through likely ClickFix social engineering techniques. The operation targets victims' credentials and cryptocurrency wallet assets while establishing persistent connections for additional payload delivery. Alternative payloads include CastleStealer and Remcos RAT. The infrastructure utilizes distributed staging and C2 domains, Telegram bots for notifications, and a Polygon smart contract as a fallback mechanism for C2 domain resolution. The WLDR agent features encrypted beaconing, task queuing, and a Runspace execution engine for exe...
A financially motivated Russian threat actor tracked as UAT-11795 is using trojanized software to steal credentials and cryptocurrency by deploying a new backdoor called Starland RAT. [...]
Kratos is a mature Phishing-as-a-Service operation targeting Microsoft 365 users across the United States, Europe, and other regions. The platform enables attackers to steal credentials through trusted platforms, anti-bot verification, and convincing login pages. Researchers traced three generations of the kit and uncovered 1,484 previously unattributed detonations. The operation targets organizations across more than 20 countries with particularly strong concentration in the US, Spain, and Southern Europe. Kratos includes an operator panel allowing deployment of phishing domains, configurable Telegram or email delivery, geographic restrictions, and multiple anti-bot systems. The kit has evolved through three page generations (V0, V1, V2) with different exfiltration code. Activity has been visible since January 2026, with the operator panel active since September 2025.
Lidl disclosed a data breach affecting customers in Germany, Belgium, and the Netherlands due to a hack of a third-party service provider. Attackers accessed and stole personal information from a separately stored file containing customer data related to Lidl's online shop. The online shop systems themselves were not compromised. Stolen data includes customer names, contact details, dates of birth, and customer numbers, with potential but unconfirmed exposure of passwords, billing, delivery addresses, and payment information. Lidl has notified affected customers and relevant authorities and warned about possible phishing attempts.
Beginning in August 2025, a sophisticated intrusion was discovered where attackers used log poisoning techniques to deploy a web shell on vulnerable phpMyAdmin panels. The threat actors exploited misconfigured web applications to plant China Chopper web shells, controlled via AntSword, before deploying Nezha, an open-source monitoring tool, to facilitate remote command execution. This led to the deployment of Ghost RAT on compromised systems. Analysis revealed over 100 compromised machines, predominantly located in Taiwan, Japan, South Korea, and Hong Kong. The attackers demonstrated technical proficiency through multi-stage operations, utilizing AWS and VPS infrastructure, with indicators pointing to China-nexus threat actors. The campaign highlights increasing abuse of legitimate publicly available tools to achieve malicious objectives while maintaining plausible deniability.
Scam advertising campaigns have been identified that impersonate trusted brands to redirect consumers to unrelated online gambling sites. These operations utilize paid social media advertisements on platforms like Facebook, Instagram, and TikTok, combined with fake app store pages and Progressive Web Apps. The campaigns target UK consumers primarily, with variants observed in German and Spanish. Scammers impersonate major brands including financial institutions like Monzo, Revolut, and Barclays, as well as household names such as Tesco, Amazon, Netflix, and Facebook. The scheme involves three stages: paid ads claiming brands have launched official casino products, fake landing pages mimicking app stores, and PWAs that redirect to gambling sites through affiliate tracking links. Typical affiliate payouts range from $50 to $350 per depositing player, indicating significant financial motivation behind these operations.
Turla has been using the backdoor against government and military organizations in Ukraine for espionage. The post Russian APT Deploys ‘StockStay’ Backdoor Against Ukrainian Targets appeared first on SecurityWeek .
Global law enforcement, including agencies from the Netherlands, Canada, United States, and Germany, coordinated Operation Endgame to disrupt TA569, a prominent cybercriminal group tracked since 2018. The operation targeted SocGholish infrastructure, taking down over 100 servers and domains while remediating 14,971 compromised websites. TA569 pioneered web inject techniques using fake browser updates to distribute malware, often leading to ransomware attacks. The group compromised high-traffic websites across multiple industries, affecting millions of visitors globally. Their attack chains involved traffic distribution systems like Keitaro TDS and ParrotTDS, delivering GhoLoader payloads that could lead to ransomware deployment in enterprise environments. Law enforcement actions included server disruption and website disinfection, significantly impacting the threat actor's operations, infrastructure, and reputation within the cybercriminal ecosystem.
Since late 2025, cybercriminals have been exploiting Wallpaper Engine, a popular live wallpaper application on Steam, to distribute malware through Steam Workshop. Attackers target primarily Chinese and Russian gamers by embedding malicious code within application wallpapers shared on the platform. These compromised wallpapers deliver various malware types including infostealers, backdoors, crypto miners, and ransomware. One analyzed sample dropped DarkKomet backdoor while hijacking Steam sessions to steal account credentials. The malware modifies system libraries to locate Steam installations and exfiltrate data to attacker-controlled servers. Compromised accounts are then used to upload additional malicious wallpapers. The diverse malware families suggest multiple independent hacking groups are exploiting this distribution method. Infected wallpapers received thousands of downloads before removal, with 89% of infections occurring in China.
A Chinese-speaking cybercrime group has expanded its targeting to the European space, deploying previously undocumented malware and the Atlas backdoor. [...]
A sophisticated smishing and phishing operation active since the second half of 2025 has impersonated over 267 brands across 72 countries, with particular concentration in Latin America. The campaign generated 4,389 phishing domain instances, with Mexico accounting for 1,851 cases. Telecommunications is the most targeted sector with 1,754 instances, followed by financial services and consumer rewards programs. The operation employs fake Cloudflare error pages as decoys, revealing malicious content only to victims matching specific geofencing and mobile device criteria. Data exfiltration occurs through encrypted WebSocket channels using binary encoded payloads. Approximately 30% of infrastructure is hosted on Tencent Cloud and Alibaba US servers, fronted by Cloudflare to mask hosting IPs. The attack chain progresses from SMS lures through progressive credential harvesting, ultimately capturing complete credit card details including CVV codes.
TA4922 is a highly sophisticated Chinese-speaking threat actor demonstrating rapid operational tempo and continually evolving malware capabilities. Initially targeting East Asia, particularly Japan, the group has expanded globally to Europe and Africa. The actor deploys multiple malware families including Atlas RAT, RomulusLoader, SilentRunLoader, and ValleyRAT (Winos4.0), alongside legitimate remote management tools like AnyDesk and SyncFuture. Campaigns use localized lures themed around HR, payroll, tax, and invoicing, targeting hundreds to thousands of recipients per campaign. TA4922 conducts credential phishing, fraud operations including credit card theft, and attempts to shift communications to out-of-band channels like LINE, WhatsApp, and Microsoft Teams. The group leverages legitimate cloud hosting services and trusted software for delivery and persistence, combining advanced tradecraft with financially motivated objectives such as data theft, fraud, access resale, and persistent remote access.
A malware-as-a-service campaign named Weedhack targets Minecraft users by distributing malicious Java JAR files via SEO poisoning and YouTube videos. The malware steals credentials, system information, and can remotely control infected systems. It is notable for its ease of access, free tier, and appeal to younger users, with infections primarily in the U. S.and several other countries. Additionally, a large CountLoader campaign spreads cryptocurrency clipper malware via cracked software, and a separate campaign distributes cryptocurrency miners through pirated content sites. These campaigns leverage sophisticated persistence and evasion techniques and have been active since early 2026.
The WeedHack malware campaign is a large-scale operation targeting Minecraft players by distributing malicious mods, clients, cheats, and utilities. Since January 2026, it has infected over 116,000 systems globally, primarily in the US, Germany, India, and the UK. The malware operates as a malware-as-a-service (MaaS) infostealer, offering free and premium tiers that steal credentials, session IDs, cookies, and cryptocurrency wallet data, and provide remote access capabilities. Distribution relies heavily on YouTube videos and SEO poisoning to lure victims to malicious download sites. The campaign's scale is reflected in thousands of unique malicious files and hundreds of distribution URLs. Users are advised to only download Minecraft mods from official sources and use the in-game Marketplace for safety.
Microsoft is working to address a widespread service issue affecting the mail flow pipeline for Exchange Online customers across North America and Germany. [...]
European governments are transitioning from encrypted messaging applications like Signal and WhatsApp to sovereign Matrix-based solutions. This shift follows successful phishing campaigns, primarily attributed to Russian intelligence services, exploiting Signal's linked devices feature to gain persistent access to political communications. While Signal was initially recommended for external communications, scope creep led to its widespread use for sensitive statecraft discussions. Matrix-based systems offer advantages including federated architecture, government-controlled identity platforms, and customizable data retention policies. However, these homegrown solutions introduce new security vulnerabilities and implementation challenges. The walled-garden nature of current sovereign systems limits their utility for international diplomacy, suggesting Signal will continue to be used for communications with external parties despite the security concerns.
Kaspersky researchers conducted an in-depth analysis of Kimsuky APT activity, revealing tactical shifts and new malware variants based on the PebbleDash platform. The group introduced HelloDoor, a Rust-based backdoor, httpMalice leveraging HTTP and Dropbox communications, and updated MemLoad and httpTroy variants. Kimsuky maintains persistence through legitimate tools including VSCode Tunneling with GitHub authentication and DWAgent remote management software. Initial access occurs via spear-phishing with malicious attachments disguised as documents. The group primarily targets South Korean entities across government and defense sectors, with additional PebbleDash attacks observed in Brazil and Germany. Infrastructure relies on free South Korean hosting services and tunneling services like Cloudflare Quick Tunnels and Ngrok. Both PebbleDash and AppleSeed malware clusters demonstrate ongoing development with shared distribution methods, stolen certificates, and overlapping targets, indicating single-actor c...
