Threats Tagged 'custom malware'

A newly discovered China-aligned APT group named LongNosedGoblin has been targeting governmental entities in Southeast Asia and Japan for cyberespionage purposes. The group employs a varied custom toolset consisting mainly of C#/.NET applications and notably uses Group Policy to deploy malware and move laterally across compromised networks. Their main tools include NosyHistorian for collecting browser history, NosyDoor backdoor using cloud services as C&C, and NosyStealer for exfiltrating browser data. The group has been active since at least September 2023 and uses techniques like AMSI bypassing and living-off-the-land tactics. LongNosedGoblin's campaigns involve multiple stages of execution and various malware components, showcasing a sophisticated approach to cyber espionage operations.

MediumMalwareGermanyFranceUnited Kingdom+5#china-aligned#custom malware#nosydownloader

ESET researchers have identified new MuddyWater activity targeting organizations in Israel and Egypt. The Iran-aligned cyberespionage group deployed custom tools to improve defense evasion and persistence, including a Fooder loader to execute the MuddyViper backdoor. The campaign demonstrates a more focused and refined approach, with the group adopting advanced techniques like CNG cryptography and reflective loading. MuddyWater's toolset includes browser data stealers, credential stealers, and reverse tunneling tools. The group primarily targeted critical infrastructure sectors through spearphishing emails containing links to remote monitoring and management software. This campaign indicates an evolution in MuddyWater's operational maturity, showcasing enhanced stealth and credential harvesting capabilities.

UNC1549, an Iranian-linked threat group, has been targeting aerospace, aviation, and defense industries since mid-2024. They employ sophisticated initial access techniques, including exploiting third-party relationships and targeted phishing. The group uses custom malware like TWOSTROKE, LIGHTRAIL, and DEEPROOT for persistence, and tools like DCSYNCER.SLICK and CRASHPAD for privilege escalation. UNC1549 demonstrates advanced lateral movement, reconnaissance, and defense evasion tactics. They extensively use SSH reverse tunnels and Azure infrastructure for command and control. The group's primary objective appears to be espionage, focusing on data collection and leveraging compromised organizations to target others in the same sector.

MediumCampaignFranceGermanyUnited Kingdom+4#dcsyncer.slick#third-party compromise#sightgrab

UNG0002, an espionage-focused threat group, has been conducting campaigns across Asian jurisdictions including China, Hong Kong, and Pakistan. The group employs sophisticated multi-stage attacks using LNK files, VBScript, and custom RAT implants. Their operations span two major campaigns: Operation Cobalt Whisper and Operation AmberMist, targeting various sectors such as defense, aviation, gaming, and academia. UNG0002 utilizes social engineering techniques like ClickFix and abuses DLL sideloading to evade detection. The group demonstrates high adaptability, evolving from using Cobalt Strike to developing custom implants like Shadow RAT and INET RAT. Attribution challenges persist, but the group is assessed to originate from South-East Asia with a focus on espionage activities.

MediumCampaignUnited KingdomGermanyFrance+7#rat implants#blister dll implant#social engineering