UNC5342 Using Blockchain for Malware Delivery

Google Threat Intelligence Group (GTIG) observed North Korean actor UNC5342 use EtherHiding—storing and retrieving malicious JavaScript payloads from smart contracts on BNB Smart Chain and Ethereum—to deliver JADESNOW and ultimately the INVISIBLEFERRET backdoor, enabling cryptocurrency theft and data exfiltration. The campaign leverages social engineering (fake interviews, malicious repo downloads), centralized API providers for blockchain reads, and frequent on-chain updates to evade takedowns and complicate mitigation. #UNC5342 #JADESNOW #INVISIBLEFERRET

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September 2025 CVE Landscape

Recorded Future’s Insikt Group identified sixteen high-impact vulnerabilities in September 2025 that should be prioritized for remediation, a slight decrease from August’s eighteen, with Cisco and TP-Link accounting for six of the sixteen issues and several vulnerabilities enabling RCE or command injection. Threat actors exploited Cisco ASA flaws (CVE-2025-20333, CVE-2025-20362) to deploy RayInitiator and LINE VIPER and abused Sitecore CVE-2025-53690 to deliver WEEPSTEEL, EARTHWORM, and SharpHound. #CVE-2025-20333 #CVE-2025-53690

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Post-exploitation framework now also delivered via npm

A malicious npm package named https-proxy-utils was published and used to deliver the AdaptixC2 post-exploitation agent via a post-install script that deployed OS-specific payloads for Windows, macOS, and Linux. The campaign abused trusted open-source package names and supply-chain mechanisms, using DLL sideloading on Windows, LaunchAgents on macOS, and /tmp delivery on Linux to achieve persistence and remote access. #AdaptixC2 #https-proxy-utils

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Falcon Defends Against Git Vulnerability CVE-2025-48384

CrowdStrike observed active exploitation of Git vulnerability CVE-2025-48384 where attackers used malicious .gitmodules with trailing carriage returns and recursive cloning to achieve arbitrary file writes and execute malicious post-checkout hooks. The campaign leveraged social engineering to distribute malicious repositories and highlights the need for timely Git patching and detection/response controls. #CVE-2025-48384…

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North Korea’s Famous Chollima APT Uses Trojanized Node.js App to Deploy OtterCookie RAT for Crypto Theft

A Cisco Talos report unveils a malicious campaign linked to North Korea’s Famous Chollima group, targeting developers through fake job offers and trojanized open-source tools. The campaign leverages malware families BeaverTail and OtterCookie to steal cryptocurrency wallets, keystrokes, and sensitive data across multiple platforms. #FamousChollima #BeaverTail #OtterCookie #NPM #SupplyChainAttack…

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BeaverTail and OtterCookie evolve with a new Javascript module

Cisco Talos uncovered a campaign linked to the Famous Chollima cluster that delivered merged BeaverTail and OtterCookie tooling via a trojanized Node.js package (“node-nvm-ssh”) and a modified Chessfi repository, resulting in keylogging, screenshotting, credential and cryptocurrency theft. The report details new OtterCookie modules (keylogger, screenshotter, clipboard theft), C2 infrastructure, delivery vectors…

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Hackers Abuse Blockchain Smart Contracts to Spread Malware via Infected WordPress Sites

UNC5142 is a sophisticated threat actor that leverages blockchain smart contracts and compromised WordPress websites to distribute information-stealing malware such as Atomic, Lumma, Rhadamanthys, and Vidar on both Windows and macOS platforms. Their evolving multi-layered infrastructure and innovative use of blockchain technology enhance their operational resilience and evasion capabilities. #UNC5142 #EtherHiding…

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North Korean Hackers Use EtherHiding to Hide Malware Inside Blockchain Smart Contracts

A North Korean-linked threat group has adopted the EtherHiding technique to spread malware and steal cryptocurrencies, marking a notable escalation in cyberattack methods. This campaign involves sophisticated social engineering and multi-stage malware targeting various operating systems to access sensitive data and digital assets. #NorthKorea #EtherHiding…

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North Korean APT “Contagious Interview” Floods npm Registry with 338 Malicious Packages to Steal Crypto

The Socket Threat Research Team warns of ongoing North Korean cyber operations exploiting open-source npm packages to target Web3 and blockchain developers. These campaigns involve sophisticated supply chain attacks, fake personas, and malicious package impersonations linked to significant cryptocurrency theft. #NorthKoreanThreatActors #npmSupplyChain…

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