{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/polinrider/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":[],"_cs_severities":["medium"],"_cs_tags":["supply-chain","npm","rat","polinrider"],"_cs_type":"advisory","_cs_vendors":["Sonatype"],"content_html":"\u003cp\u003eAttackers are increasingly targeting the software supply chain by hijacking npm packages. This allows them to insert malicious code directly into projects during the build process, bypassing traditional vulnerability exploitation routes that rely on CVEs. While the specific hijacked package is not named in this brief, the attack involves injecting a Remote Access Trojan (RAT) associated with the PolinRider threat actor. This technique is particularly effective because developers often implicitly trust packages from established repositories like npm, making it easier for malicious code to be unknowingly included in their applications. This type of attack can have wide-ranging consequences, impacting numerous downstream users and organizations.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttackers compromise an existing npm package, likely through stolen credentials or social engineering.\u003c/li\u003e\n\u003cli\u003eMalicious code is injected into the package, potentially obfuscated to avoid detection.\u003c/li\u003e\n\u003cli\u003eThe compromised package is published to the npm repository, replacing the legitimate version.\u003c/li\u003e\n\u003cli\u003eDevelopers unknowingly install the malicious package or update to the compromised version.\u003c/li\u003e\n\u003cli\u003eDuring the build process, the injected code executes on the developer\u0026rsquo;s machine.\u003c/li\u003e\n\u003cli\u003eThe malicious code establishes a connection to a command-and-control (C2) server.\u003c/li\u003e\n\u003cli\u003eThe PolinRider-linked RAT is downloaded and installed on the compromised system.\u003c/li\u003e\n\u003cli\u003eThe RAT grants the attacker remote access to the infected machine, enabling data theft, further malware deployment, or other malicious activities.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eCompromised npm packages can lead to widespread infections across numerous projects and organizations that depend on the affected package. Successful attacks can result in data breaches, system compromise, and supply chain disruption. The injection of a PolinRider-linked RAT enables attackers to gain persistent remote access to infected systems, potentially impacting sensitive development environments and production deployments. The full extent of the impact depends on the popularity and usage of the hijacked package.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eImplement strong authentication and access controls for npm package maintainers to prevent account compromise.\u003c/li\u003e\n\u003cli\u003eEnable and review npm\u0026rsquo;s two-factor authentication (2FA) for all maintainer accounts.\u003c/li\u003e\n\u003cli\u003eImplement software composition analysis (SCA) tools to monitor dependencies and detect suspicious changes in npm packages.\u003c/li\u003e\n\u003cli\u003eRegularly audit dependencies for known vulnerabilities and malicious code.\u003c/li\u003e\n\u003cli\u003eMonitor network traffic for connections to known PolinRider infrastructure.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-21T20:53:20Z","date_published":"2026-05-21T20:53:20Z","id":"https://feed.craftedsignal.io/briefs/2026-05-npm-package-hijack-polinrider/","summary":"Attackers are compromising npm packages to distribute a RAT linked to PolinRider, directly injecting malicious code into the software supply chain.","title":"Hijacked npm Package Attempts to Deliver PolinRider-Linked RAT","url":"https://feed.craftedsignal.io/briefs/2026-05-npm-package-hijack-polinrider/"}],"language":"en","title":"CraftedSignal Threat Feed — Polinrider","version":"https://jsonfeed.org/version/1.1"}