{"answers":{"affected":"1 open source package ship an affected version, including tinkoff-boxy-independent-kasko-form.","exploited":"There is no known exploitation of MAL-2026-12233 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-2026-12233 is a malicious package in tinkoff-boxy-independent-kasko-form, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12233 is a malicious package: tinkoff-boxy-independent-kasko-form (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-2026-12233/ (Markdown: https://insights.sbomify.com/MAL-2026-12233/index.md)","id":"MAL-2026-12233","markdown":"https://insights.sbomify.com/MAL-2026-12233/index.md","name":"MAL-2026-12233","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"On require of the package, index.js loads _bootstrap.js which reconstructs hardcoded hostnames via split-string.join obfuscation and downloads a platform-specific binary from Cloudflare Workers subdomains (oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev). If HTTPS mirrors fail, resolveDns() reads a chunk count from c.\u003cdomain\u003e TXT records and fetches base64-encoded payload chunks from N.tin.dl.well1.site TXT records, reassembling them into an executable. The payload is written to /tmp or %TEMP% under disguised filenames (.cache_\u003chex\u003e, dotnet_diag_\u003chex\u003e.exe), chmod 0755, and spawned detached via cp.spawn(\"/bin/sh\", [\"-c\", filePath + \" \u0026\"]) or cmd equivalent on Windows. The package name references an unrelated 'kasko form' library, unrelated to the dropper behavior. lib/telemetry.js ships a second copy of the same drop-and-exec logic under an 'analytics SDK' cover story.","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 tinkoff-boxy-independent-kasko-form (npm)","id":"MAL-2026-12233","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":[],"last_affected":[],"package":"tinkoff-boxy-independent-kasko-form","purl":"pkg:npm/tinkoff-boxy-independent-kasko-form","source":"MAL-2026-12233"}],"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-2026-12233/"}