{"answers":{"affected":"1 open source package ship an affected version, including bigops-chat-tmsg.","exploited":"There is no known exploitation of MAL-2026-12036 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-2026-12036 is a malicious package in bigops-chat-tmsg, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12036 is a malicious package: bigops-chat-tmsg (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-2026-12036/ (Markdown: https://insights.sbomify.com/MAL-2026-12036/index.md)","id":"MAL-2026-12036","markdown":"https://insights.sbomify.com/MAL-2026-12036/index.md","name":"MAL-2026-12036","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 bigops-chat-tmsg, index.js silently loads _runtime.js (via a swallowed try/require appended after an empty stub class exposing init/version/configure). _runtime.js selects a platform-specific asset and downloads a binary from one of three string-concatenation-obfuscated Cloudflare Workers hosts (oob-worker.cf101-adf.workers.dev, cf102-baf.workers.dev, cf103-070.workers.dev), writes it to /var/tmp or %TEMP% under a disguised name (.cache_\u003chex\u003e on Unix, dotnet_diag_\u003chex\u003e.exe on Windows impersonating a Microsoft diagnostic tool), chmods 0755, and spawns it detached via /bin/sh -c or cmd. If HTTPS fetches fail, the code falls back to a covert DNS-TXT channel at split-string-reconstructed domains (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru): it resolves TXT records for a chunk count on c.\u003cdomain\u003e and reassembles a base64-encoded executable from numbered subdomain TXT responses. The package name/description advertise a chat/messaging library, but the entire real behavior is the dropper; the exported API is a do-nothing stub used as cover.","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-chat-tmsg (npm)","id":"MAL-2026-12036","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-chat-tmsg","purl":"pkg:npm/bigops-chat-tmsg","source":"MAL-2026-12036"}],"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-2026-12036/"}