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The Russian state-sponsored threat actor known as Turla has been attributed to a previously undocumented .NET backdoor called STOCKSTAY that has been deployed against government and military organizations in Ukraine, and entities that have an interest in Italian foreign policy
Researchers Identified Two Undocumented Variants Used Since 2023Eset uncovered two previously undocumented Windows variants of the China-linked SprySocks backdoor tied to FishMonger and iSoon, revealing expanded espionage capabilities, rootkit-based stealth and continued targeting of government organizations across Asia and Central America.
A China-nexus cyber espionage group has been observed deploying a BSD variant of a known backdoor called BRICKSTORM, as well as two other malware families codenamed PLENET (aka GRIMBOLT) and AGENTPSD to target Linux systems
The Russian state-sponsored hacking group known as Turla has transformed its custom backdoor Kazuar into a modular peer-to-peer (P2P) botnet that's engineered for stealth and persistent access to compromised hosts
Researchers Say Nation-State Actors Are Evolving Persistence TechniquesAn apparent Chinese nation-state hacking group gussied up its tooling with new modular functionality, say security researchers who observed a cyberespionage campaign affecting Asia-Pacific governments. The activity resembles attack patterns of the threat actor tracked as Mustang Panda
Website Popular in Korean Ethnic Enclave in China Hosts Apps Laced With a BackdoorA North Korean hacking group has been spying on a Korean ethnic enclave in China by infiltrating the Android apps of a regional gaming platform that hosts digital card and board games. Researchers attributed the supply-chain attack to a threat actor that Eset tracks as ScarCruft.
The North Korea-aligned state-sponsored hacking group known as ScarCruft has compromised a video game platform in a supply chain espionage attack, trojanizing its components with a backdoor called BirdCallto likely target ethnic Koreans residing in China
New research from Broadcom's Symantec and Carbon Black Threat Hunter Team has discovered evidence of an Iranian hacking group embedding itself in several U.S. companies' networks, including banks, airports, non-profit, and the Israeli arm of a software company
Google Unmasks, Disrupts Group Using Sheets for Command-and-Control PurposesLikely Chinese nation-state hackers used online spreadsheets as infrastructure for hacking campaigns that affected at least 53 telecom operators across 42 countries, Google disclosed Wednesday. Incident responders discovered a backdoor being remotely controlled through Google Sheets.
UNC2814 hit 53 victims in 42 countries with novel backdoor in decade long cyber espionage operation
A China-linked threat actor known as Lotus Blossom has been attributed with medium confidence to the recently discovered compromise of the infrastructure hosting Notepad++
The Chinese hacking group known as Mustang Panda has leveraged a previously undocumented kernel-mode rootkit driver to deliver a new variant of backdoor dubbed TONESHELL in a cyber attack detected in mid-2025 targeting an unspecified entity in Asia
The Iranian hacking group known as MuddyWater has been observed leveraging a new backdoor dubbed UDPGangster that uses the User Datagram Protocol (UDP) for command-and-control (C2) purposes
Israeli entities spanning academia, engineering, local government, manufacturing, technology, transportation, and utilities sectors have emerged as the target of a new set of attacks undertaken by Iranian nation-state actors that have delivered a previously undocumented backdoor called MuddyViper
Threat actors with ties to China have been attributed to a novel campaign that compromised an ArcGIS system and turned it into a backdoor for more than a year
Cybersecurity researchers have discerned evidence of two Russian hacking groups Gamaredon and Turla collaborating together to target and co-comprise Ukrainian entities
The Russian state-sponsored hacking group tracked as APT28 has been attributed to a new Microsoft Outlook backdoor called NotDoor in attacks targeting multiple companies from different sectors in NATO member countries
Malware isn’t just trying to hide anymore—it’s trying to belong. We’re seeing code that talks like us, logs like us, even documents itself like a helpful teammate. Some threats now look more like developer tools than exploits. Others borrow trust from open-source platforms, or quietly build themselves out of AI-written snippets. It’s not just about being malicious—it’s about being believable.
Hacking Group UNC6148 Steals Credentials With New OVERSTEP Rootkit, Google SaysA cybercrime group used a backdoor in a fully patched SonicWall appliance to steal credentials and may have sold the stolen data to ransomware groups as part of an ongoing campaign, Google Threat Intelligence Group found. The firm attributed the campaign to a cybercrime group it tracks as UNC6148.
In a twist on typical hiring-related social engineering attacks, the FIN6 hacking group impersonates job seekers to target recruiters, using convincing resumes and phishing sites to deliver malware. [...]