{"schema_version":"1.8.0","id":"MAL-2026-12548","published":"2026-08-05T14:14:04Z","modified":"2026-08-05T14:35:18.058034984Z","summary":"Malicious code in checkout-commit-pos-order-am (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (732c6bcc33ca109e02cca656cb0f2324504d3bc3176cff55420b4705990a62e8)\ncheckout-commit-pos-order-am@35.8.4 executes a dropper on module load. Its main entry `index.js` requires `_shim.js`, which selects a platform-specific asset path and downloads an opaque native binary over HTTPS from hardcoded `oob-worker.cf102-baf.workers.dev`, `oob-worker.cf99-9b3.workers.dev`, and `oob-worker.cf103-070.workers.dev` hosts, with a DNS TXT-record fallback that reassembles base64 chunks from `sdk.dl.wel1.ru`, `ext.dl.wel1.ru`, `pkg.dl.wel1.ru`, and `net.dl.wel1.ru`. Destination hostnames and the `child_process` require are built at runtime by joining fragmented substrings to evade static scanners. The downloaded bytes are written to `/var/tmp/.cache_<hex>` on Unix or `%TEMP%\\dotnet_diag_<hex>.exe` on Windows (disguised filenames), chmod 0755, and spawned detached via `/bin/sh -c \"<path> &\"` or `cmd.exe /c start /b`. A parallel dropper with the same download-chmod-spawn shape is bundled as `lib/telemetry.js` (~81KB) under an analytics-SDK cover story and is not currently wired from the entry points but ships in the tarball.\n","affected":[{"package":{"name":"checkout-commit-pos-order-am","ecosystem":"npm","purl":"pkg:npm/checkout-commit-pos-order-am"},"versions":["35.8.4"],"database_specific":{"cwes":[{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"}],"indicators":{"evidence_files":[{"path":"_shim.js","sha256":"8936b119216cd834baf02997a34a8d9b2b6116a8e842be81f948844648ae444b","tlsh":"58a1946a16a6711887b0dbe4c6175416f65af2633780c2d8f79c69881ff212483b2efc"},{"path":"lib/telemetry.js","sha256":"18c7563d79afa40840a62eb5fbe51b88dc499cc73902c7026b04e8ae946dc787","tlsh":"da835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc"}],"package_integrity":[{"filename":"checkout-commit-pos-order-am-35.8.4.tgz","hashes":{"sha1":"2420a741d1b6f598de1062267e66e7d303e9db9e","sha512_sri":"sha512-f+tkc5yhfcQqZ0+f5MHVZldpve55N9RFDdzqYj3Firv5fwV2IsUM/MsSbgWhL9lA8g1tm9tnmDO2XdsaMfKUGQ=="}}]},"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/checkout-commit-pos-order-am/MAL-2026-12548.json"}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/checkout-commit-pos-order-am/v/35.8.4"}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-015219","import_time":"2026-08-05T14:20:13.96164967Z","modified_time":"2026-08-05T14:14:04Z","sha256":"732c6bcc33ca109e02cca656cb0f2324504d3bc3176cff55420b4705990a62e8","source":"amazon-inspector","versions":["35.8.4"]}]},"credits":[{"name":"Amazon Inspector","contact":["inspector-research@amazon.com"],"type":"FINDER"}]}