{"answers":{"affected":"1 open source package ship an affected version, including bigops-chat-transfer.","exploited":"There is no known exploitation of MAL-2026-12156 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-2026-12156 is a malicious package in bigops-chat-transfer, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12156 is a malicious package: bigops-chat-transfer (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-2026-12156/ (Markdown: https://insights.sbomify.com/MAL-2026-12156/index.md)","id":"MAL-2026-12156","markdown":"https://insights.sbomify.com/MAL-2026-12156/index.md","name":"MAL-2026-12156","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-transfer, _platform.js reconstructs one of three Cloudflare workers.dev hostnames from split string fragments (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), downloads a platform-specific native binary over HTTPS, and — if HTTPS fails — falls back to a DNS-TXT covert channel under *.dl.wel1.ru that reconstructs a base64-encoded binary from sequentially numbered TXT records. The downloaded bytes are written to /var/tmp/.cache_\u003cuid\u003e on Unix or %TEMP%/dotnet_diag_\u003cuid\u003e.exe on Windows, chmod 0755'd, and spawned detached via /bin/sh -c or cmd /c start. A.analytics_state lock file provides rate-limit persistence, and the naming (dotnet_diag, analytics_state) is a cover story masquerading as.NET diagnostics telemetry. Destination hosts are not the package publisher's infrastructure, the fetched executable is opaque and unverified, and execution is triggered by ordinary import of the module.","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-transfer (npm)","id":"MAL-2026-12156","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-transfer","purl":"pkg:npm/bigops-chat-transfer","source":"MAL-2026-12156"}],"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-2026-12156/"}