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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
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
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
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
Threat hunters have exposed the tactics of a China-aligned threat actor called UnsolicitedBooker that targeted an unnamed international organization in Saudi Arabia with a previously undocumented backdoor dubbed MarsSnake
The Chinese threat actor known as FamousSparrow has been linked to a cyber attack targeting a trade group in the United States and a research institute in Mexico to deliver its flagship backdoor SparrowDoor and ShadowPad
MirrorFace Expands Operations, Revives Anel Backdoor for EspionageA threat actor associated with Chinese cyberespionage campaigns against Japan stepped outside its East Asian comfort zone to target a European organization with a refreshed set of hacking tools. A hacking group tracked as MirrorFace and Earth Kasha deployed a backdoor once exclusively used by APT10.
Juniper Networks Urges Immediate Updating and Malware Scans to Block AttackersHackers have been infecting outdated Juniper MX routers with backdoor malware as part of an apparent cyberespionage campaign that traces to a Chinese-affiliated hacking team tracked as UNC 3886, warned Google's Mandiant incident response group.
A Chinese hacking group is hijacking the SSH daemon on network appliances by injecting malware into the process for persistent access and covert operations. [...]
Hackers Targeted a PAN-OS Flaw Days After Its DisclosureA suspected Chinese hacking campaign that began in November is exploiting a vulnerability in Palo Alto firewalls to install a custom malware backdoor for espionage. UNC5325 activity aligns with the Chinese hacking strategy of targeting edge devices.
The Chinese Winnti hacking group is using a new PHP backdoor named 'Glutton' in attacks on organizations in China and the U.S., and also in attacks on other cybercriminals. [...]
The China-linked threat actor known as Earth Estries has been observed using a previously undocumented backdoor called GHOSTSPIDER as part of its attacks targeting Southeast Asian telecommunications companies. Trend Micro, which described the hacking group as an aggressive advanced persistent threat (APT), said the intrusions also involved the use of another cross-platform backdoor dubbed
The Chinese state-sponsored hacking group Salt Typhoon has been observed utilizing a new "GhostSpider" backdoor in attacks against telecommunication service providers. [...]
A new Linux backdoor called 'WolfsBane' has been discovered, believed to be a port of Windows malware used by the Chinese 'Gelsemium' hacking group. [...]