?Threat actors are increasingly abusing the legitimate Node.js JavaScript runtime to execute malicious scripts, evade detection, and maintain persistence. According to Symantec, this technique has been observed since February 2026 against government departments, technology companies, hotels, and financial organizations. Attackers exploit ‘node.exe’ because it is a legitimate, digitally signed developer tool, while malicious functionality is stored in scripts instead of traditional executable files. Recent campaigns have combined Node.js with ClickFix, PowerShell, AdaptixC2, Cobalt Strike, EtherRAT, ModeloRAT, Mistic, and C2Looper. The infection phase commonly begins with ClickFix social engineering, where victims are tricked into executing attacker-provided commands through Windows Run. Attackers then use obfuscated PowerShell commands to download scripts, establish persistence through Windows services, and perform reconnaissance like enumerating domain computers. In one Asian technology organization, repeated attempts to deploy AdaptixC2 and Cobalt Strike were blocked, prompting attackers to download the official Node.js installer and use ‘node.exe’ to execute a malicious implant. During the attack phase, the Node.js implant used a malicious addon and established persistence through a Windows Registry Run key, allowing execution at user login. It also performed host reconnaissance, including checking the system's public IP address. The implant subsequently communicated with Ethereum blockchain RPC services, likely using EtherHiding to retrieve C2 information or additional payloads concealed within smart contracts. Attackers also attempted to deploy AdaptixC2 and Cobalt Strike binaries. In a separate U.S. fintech intrusion, similar ClickFix activity led to PowerShell persistence, followed by AdaptixC2, Cobalt Strike, and the Rust-based C2Looper backdoor. Organizations should monitor unusual execution of ‘node.exe’, especially from unexpected directories, and investigate Node.js usage on systems where it is not required. Security teams should monitor suspicious PowerShell activity, Registry Run-key modifications, service creation, blockchain RPC communications, and anomalous Cloudflare infrastructure. Continuous monitoring of public-facing websites, application allowlisting, endpoint protection, network filtering, restricted browser extensions, and security awareness training can help prevent and detect ClickFix and Node.js-based attacks.
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