All news with #apt tag

🛡️ Since January 2026, Microsoft observed Russian state-affiliated actor Star Blizzard refine large-scale phishing, use compromised-site accounts, and adopt a novel malware delivery technique called RedFlick. RedFlick leverages scheduled tasks to deploy the actor’s Python backdoor CosmicPulse, reducing required user interaction to a single response and improving evasion. Microsoft details observed TTPs, IOCs, mitigations, and detection guidance to help organizations defend against this evolving threat.

🔐 The author dissected GraphWorm, a OneDrive‑based backdoor used by the Webworm APT, and found revoking tokens often fails to remove access. The implant authenticates as an OAuth application with embedded credentials and polls a OneDrive folder for tasks, allowing operators to replace credentials remotely. Because the registration itself is durable and the implant identifies hosts by hardware fingerprints, simple token revocation or network changes do not reliably contain the threat. The piece recommends treating application registrations as primary targets for response and hunting in cloud identity telemetry.

🔒 Kaspersky reports three distinct threat clusters—NightEagle, Hacking Cat, and Toy Ghouls—are actively targeting Russian enterprises using novel persistence, lateral movement, and destructive techniques. NightEagle leverages GhostContainer against Microsoft Exchange and abuses tunnels and Active Directory exploits for persistence. Hacking Cat has shifted to Gorilla RAT and multiple Monkey ransomware variants, while Toy Ghouls deploys a custom Bird Agent backdoor using HiveMQ and Matrix for C2.

🛡️ Last week the US Justice Department and FBI seized domains tied to QScan and QTRouter, platforms used by PRC-linked group QTFY to target US agencies and critical infrastructure. QTFY, operated by Nanjing Xinjiuwei, provided scanning, exploitation, and obfuscation services—turning IoT devices into routing infrastructure for state clients. The takedown highlights how marketized contractors and shared services scale Chinese offensive operations while creating choke points for law enforcement. Experts urge CISOs to shift from IP-based defenses to behavioral visibility, rapid patching, and stronger edge controls.

🔍 Researchers at Kaspersky say an advanced threat actor, tracked as HelloNet, has abused the ViPNet update mechanism since at least May to deliver a loader and proxy targeting Russian organizations, including government agencies. Attackers dropped a malicious DLL (wtsapi32.dll, "HelloInjector") into the local ViPNet Update System to be sideloaded by the legitimate updater, gaining persistence and elevated privileges. The campaign delivers additional modules—HelloProxy, HelloExecutor, HelloCleaner, and a Rust-based HelloBackdoor—enabling command execution, file transfer, reconnaissance, and log removal. Kaspersky assigns low-confidence attribution to a Chinese-speaking APT and recommends close monitoring of systems running ViPNet, especially traffic on ports 5003, 5060, and 443.

🔒 SentinelLabs reports that suspected China- and India-linked cyber operators targeted multiple Pakistani law enforcement systems between February 2024 and April 2026, focusing on Balochistan Police. The compromise affected servers hosting biometric records, case files and tenant registrations, and included implants in a public Complaint Management System. Analysts linked PlugX, ShadowPad and Cobalt Strike to China-nexus activity and Remcos to a suspected India-nexus actor. The incidents underscore risks from centralized police IT systems and concentrated intelligence value.

🔍 Cisco Talos reports a China-nexus APT tracked as UAT-7810 has expanded a network of hijacked routers and devices called Operational Relay Boxes (ORBs) to hide other attackers' traffic. The group maintained a long-running LapDogs relay infrastructure and exploited unpatched Ruckus and ASUS router vulnerabilities to recruit devices. Researchers uncovered an upgraded backdoor, LONGLEASH, plus two new tools, DOGLEASH and JARLEASH, with evidence suggesting Chinese-speaking operators. Talos says the group's servers and malware remain active.

🛡️ Check Point Research has identified a new Iran-linked cyber threat group, dubbed Cavern Manticore, targeting Israeli government and IT organizations since early 2026. The group leverages abused RMM tools and browser-based remote desktop features for initial access and persistence, often deploying malicious updates via SysAid. Researchers observed a previously undocumented modular .NET-based C2 framework composed of a persistent Cavern agent and specialized Cavern modules, designed to evade detection and hinder forensic analysis.

🔔 The FBI has issued a public service announcement warning that multiple clusters of Russian intelligence actors, including FSB officers and military hackers, are targeting high-risk users to steal Signal Backup Recovery Keys. The campaign uses phishing messages masquerading as messaging app support to elicit verification codes, account PINs, and recovery keys. Victims include government officials, military personnel, journalists and Ukrainian officials. Users are advised to only trust official support channels and to generate a new recovery key to invalidate older backups.

🛡️ Volexity researchers attribute prolonged intrusions to the Chinese espionage group UNC5221 (aka VerdantBamboo), which used the Brickstorm backdoor plus previously undocumented malware Plenet and AgentPSD to maintain access. The actor compromised an MSP and victim systems, remaining undetected for at least 18 months and returning after remediation. Plenet is a cross-platform .NET backdoor; AgentPSD is a Python reverse shell used as fallback persistence.

🔎 ESET warns that China-aligned APT groups have been exploiting the Middle East war to target maritime, energy and political organizations, while continuing global espionage aligned with Beijing’s strategic priorities. The report covers October 2025–March 2026 and highlights activity against Syria, Central and South America, and an attempted intrusion into an AI and robotics firm in South Korea. Russia-aligned actors focused on Ukraine and destructive campaigns, while Iran-aligned activity shifted to proxy and hacktivist actions amid internet disruptions.

📄 ESET summarizes notable APT activity observed between October 2025 and March 2026, highlighting China-, Iran-, North Korea-, and Russia-aligned operations alongside unattributed clusters. The report illustrates geopolitical drivers behind campaigns, describes new tooling and supply-chain compromises such as a trojanized axios package, and notes destructive incidents impacting critical infrastructure. ESET confirms protections by its products and notes the report reflects a subset of its Threat Intelligence.

📄 The Belarus-aligned threat actor Ghostwriter (aka UAC-0057/UNC1151) is using Prometheus e-learning themed phishing lures targeting Ukrainian government entities. CERT-UA reports the campaign, active since spring 2026, uses PDF links to deliver a ZIP with JavaScript that stages multiple payloads: OYSTERFRESH, OYSTERBLUES, and OYSTERSHUCK. The operation harvests system data and ultimately deploys Cobalt Strike, with advice to restrict wscript.exe for standard users to reduce risk.

🛡️ Check Point Research’s March–April 2026 Threat Landscape Digest documents that AI-powered attacks have moved from experimental and state-sponsored exercises into routine criminal deployment. The report details a campaign in Mexico where a single operator used commercial AI to compromise nine government agencies, leveraging persistent jailbreaks, weaponized agent configuration files, and commodified attack platforms like EvilTokens. It warns that stolen AI provider keys, rapid exploit timelines, and shadow AI use create urgent operational and supply-chain risks for organizations.

🔒 ESET researchers report that the China-aligned APT group Webworm expanded operations in 2025 to target European government organizations in Belgium, Italy, Poland, Serbia and Spain, and also compromised a university in South Africa. Analysis presented at ESET World on 19 May by Robert Lipovsky described the campaign as largely semi-opportunistic, with some cases linked to legacy vulnerabilities such as a discontinued SquirrelMail flaw. The group introduced two new backdoors — Discord-based EchoCreep and Microsoft Graph-based GraphWorm — and continues to use a complex set of proxy tools and cloud-based data exfiltration techniques.

🔍 Kazuar, attributed to the Russian state actor Secret Blizzard, has progressed from a traditional backdoor into a modular peer-to-peer botnet engineered for espionage and persistent access. Its architecture separates functionality into Kernel, Bridge, and Worker modules, enabling leader election and SILENT-mode behavior to minimize external visibility. Delivery methods include the Pelmeni dropper and .NET loaders that bind payloads to targeted hosts. The malware uses named pipes, mailslots, and window messaging with AES-encrypted IPC and multiple C2 transports for resilience and stealth.

🔐 Cisco Talos attributes a China-nexus APT it tracks as UAT-8302 to sustained attacks on government entities in South America since late 2024 and on agencies in southeastern Europe in 2025. The actor deploys custom backdoors, notably a .NET implant called NetDraft (aka NosyDoor), and leverages tools such as CloudSorcerer, VShell and SNOWLIGHT/SNOWRUST. Talos highlights reuse of malware linked to multiple China-aligned clusters and extensive reconnaissance, lateral movement, and proxy/VPN-based persistence.

🔒 Cisco Talos discloses UAT-8302, a China-nexus APT targeting government entities in South America and southeastern Europe since late 2024 into 2025. Post-compromise activity includes reconnaissance, credential theft, and lateral movement using tools like Impacket, plus deployment of multiple custom backdoors such as NetDraft, CloudSorcerer v3, and VSHELL with stagers SNOWLIGHT and SNOWRUST. Talos links these artifacts to other China-nexus clusters and publishes IOCs, ClamAV signatures, and Snort rules to assist defenders.

⚠️ ESET reports that the North Korea‑aligned threat group ScarCruft compromised the sqgame[.]net gaming platform in a targeted supply‑chain operation to deploy the BirdCall backdoor to Android and Windows users. The compromise, active since late 2024, trojanized Android APKs for two games and delivered a malicious Windows update DLL that used RokRAT as a loader. BirdCall — an evolution of RokRAT — harvests contacts, SMS, call logs, media, screenshots, keystrokes and ambient audio, and leverages legitimate cloud services for command‑and‑control.

📱 ESET researchers report that North Korean-linked APT37 (ScarCruft) developed an Android variant of the BirdCall backdoor and distributed it through trojanized APKs on the sqgame.net game platform. The Android implant, first seen around October 2024 and produced in at least seven variants, collects contacts, call logs, SMS, device identifiers, location and system metrics, takes periodic screenshots, records audio during evening hours, and exfiltrates targeted files to a C2. The campaign focused on users in the Yanbian region and underscores ScarCruft’s continued use of supply-chain tactics; users are advised to download apps only from official marketplaces and trusted publishers.