{"answers":{"affected":"1 open source package ship an affected version, including bigops-procedure-file-handlers.","exploited":"There is no known exploitation of MAL-2026-13233 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-2026-13233 is a malicious package in bigops-procedure-file-handlers, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-13233 is a malicious package: bigops-procedure-file-handlers (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-2026-13233/ (Markdown: https://insights.sbomify.com/MAL-2026-13233/index.md)","id":"MAL-2026-13233","markdown":"https://insights.sbomify.com/MAL-2026-13233/index.md","name":"MAL-2026-13233","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, _runtime.js downloads a platform-specific executable from obfuscated Cloudflare Workers endpoints (hostnames reassembled at runtime via array-join, e.g. oob-worker.cf99-9b3.workers.dev and sibling cf101/cf103/cf100 workers), writes it to /tmp or %TEMP% under a cover-story filename (dotnet_diag_\u003ctag\u003e.exe on Windows,.cache_\u003ctag\u003e on Unix), chmods it to 0755, and detached-spawns it via /bin/sh -c or cmd.exe /c start /b. If HTTPS delivery fails, a fallback path queries DNS TXT records at subdomains of *.dl.wel1.ru, reads a chunk count from c.\u003chost\u003e, reassembles base64 chunks from N.\u003chost\u003e TXT records, and executes the resulting buffer. A stamp file.analytics_state is written to disguise the drop as OS/telemetry state. The obfuscation of destinations, covert DNS-TXT delivery channel, and disguised filenames indicate intentional evasion rather than legitimate telemetry or binary distribution.","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 bigops-procedure-file-handlers (npm)","id":"MAL-2026-13233","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":"bigops-procedure-file-handlers","purl":"pkg:npm/bigops-procedure-file-handlers","source":"MAL-2026-13233"}],"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-2026-13233/"}