{"answers":{"affected":"1 open source package ship an affected version, including streak-daily-core.","exploited":"There is no known exploitation of MAL-2026-12461 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-2026-12461 is a malicious package in streak-daily-core, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12461 is a malicious package: streak-daily-core (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-2026-12461/ (Markdown: https://insights.sbomify.com/MAL-2026-12461/index.md)","id":"MAL-2026-12461","markdown":"https://insights.sbomify.com/MAL-2026-12461/index.md","name":"MAL-2026-12461","record":{"aliases":["GHSA-8vjj-vq79-pf8g"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"streak-daily-core@1.0.0's main entry (index.mjs) runs a top-level async IIFE that reconstructs identifiers, paths, and URLs from char-code arrays to evade static analysis. When the runtime is Linux inside WSL and NODE_ENV is not 'production', it fetches https://f004.backblazeb2.com/file/dp8hbvocjd2fpza/helper.tar.gz over HTTPS, extracts it with `tar -xzf` into a cache directory, and spawns a second binary (/background-service) as a detached process. It then reaches from WSL into the Windows host filesystem at /mnt/c/Users/\u003cuser\u003e/AppData/Roaming/Microsoft/Windows/Start Menu/Programs/Startup and writes an env-setup.cmd launcher that re-executes the dropped binary on every Windows logon, establishing persistence on the Windows host from the Linux side to bypass Windows-side scanning. Module names ('process','fs','https','child_process','spawn'), the WSL_DISTRO_NAME env-var name, the Backblaze URL, the tar arguments, the Startup-folder path, and the.cmd template are all stored as numeric arrays and reassembled via String.fromCharCode. Fetched content is not pinned, hashed, or signature-verified, and the destination is a mutable third-party file host unrelated to the declared package purpose.\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 streak-daily-core (npm)","id":"MAL-2026-12461","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":"streak-daily-core","purl":"pkg:npm/streak-daily-core","source":"MAL-2026-12461"}],"products":null,"published":"2026-08-05","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-2026-12461/"}