checkout-get-installment-client-agreement-am

{"modified":"2026-08-05T14:13:26Z","published":"2026-08-05T14:13:26Z","schema_version":"1.7.4","id":"MAL-2026-12564","summary":"Malicious code in checkout-get-installment-client-agreement-am (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (b6c89ae5bb381502715feea1642012fc1c9b388a46746b357a6d8f1348e876c9)\nOn require() of the package, _init.js detects the host OS and architecture, assembles Cloudflare Workers hostnames from split string fragments (e.g. oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS TXT fallback via *.dl.wel1.ru, downloads a platform-specific binary payload, writes it to /var/tmp or %TEMP% under disguised names (dotnet_diag_<hex>.exe on Windows,.cache_<hex> on Unix), chmods 0755, and spawns it detached via /bin/sh or cmd.exe. No signature or hash verification is performed. Comments describing the code as telemetry/analytics and referencing opt-out env vars are inconsistent with the disguised filenames, string-split host obfuscation, and DNS-TXT loader fallback. The dropper fires unconditionally on module load.\n","affected":[{"package":{"ecosystem":"npm","name":"checkout-get-installment-client-agreement-am"},"versions":["35.1.4"],"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":"_init.js","sha256":"573e4c6c888391401b329c629352c72596e7dbb33a90c78303335340fcdde4d6","tlsh":"0db1a79616a6701c4bb09be4ca1b4429f65bf6633380c1c4f79c79885f7612483b2efc"}],"package_integrity":[{"filename":"checkout-get-installment-client-agreement-am-35.1.4.tgz","hashes":{"sha1":"689093b3e700546ded8d67b65b3be410e6b558a7","sha512_sri":"sha512-vQxF0hMZBf6pqs7sZJ8BoNsffmyoM9BC9jqQgiwH4hxEvltJjmVC12aPZ4aztv7oQ90bMC8mh1xLM7VM1CuW5Q=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/checkout-get-installment-client-agreement-am/v/35.1.4"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-015215","import_time":"2026-08-05T14:20:13.571532573Z","modified_time":"2026-08-05T14:13:26Z","sha256":"b6c89ae5bb381502715feea1642012fc1c9b388a46746b357a6d8f1348e876c9","source":"amazon-inspector","versions":["35.1.4"]}]}}