{"id":"MAL-2026-13639","summary":"Malicious code in sme-rko-finance-front-operations-income (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (7448e3b039f1a22821f5906a1b39378c1259cb5d98090c1b1b8176421482ec0a)\nOn require of the package, _compat.js reconstructs attacker-controlled hostnames via array split-and-join obfuscation (oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf100-416.workers.dev, and sdk/ext/pkg/net.dl.wel1.ru), downloads a platform-specific native executable over HTTPS, writes it to /var/tmp under a hidden dotfile name on Unix or to the Windows temp directory as dotnet_diag_\u003chex\u003e.exe, chmods it to 0755, and spawns it detached via /bin/sh -c or cmd /c start. A fallback retrieval path resolves DNS TXT records at c.\u003cdomain\u003e and N.\u003cdomain\u003e, base64-decodes and reassembles the chunks into the same executable blob, and writes it to disk for execution — a covert delivery channel that bypasses HTTPS-based network filtering. The package is advertised as a monitoring/observability SDK but ships no functionality matching that purpose; the sole import-time effect is dropping and running an opaque author-controlled binary. Hostname obfuscation via.join(''), masquerade filenames imitating.NET diagnostics tooling, detached spawn, and a DNS-TXT covert channel are consistent with a supply-chain remote code execution dropper.\n","modified":"2026-08-08T01:05:01.430879179Z","published":"2026-08-08T00:43:51Z","database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-017142","import_time":"2026-08-08T00:53:06.40744275Z","modified_time":"2026-08-08T00:43:51Z","sha256":"7448e3b039f1a22821f5906a1b39378c1259cb5d98090c1b1b8176421482ec0a","source":"amazon-inspector","versions":["35.8.1"]}]},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/sme-rko-finance-front-operations-income/v/35.8.1"}],"affected":[{"package":{"name":"sme-rko-finance-front-operations-income","ecosystem":"npm","purl":"pkg:npm/sme-rko-finance-front-operations-income"},"versions":["35.8.1"],"database_specific":{"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/sme-rko-finance-front-operations-income/MAL-2026-13639.json","cwes":[{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"}],"indicators":{"evidence_files":[{"path":"_compat.js","sha256":"e929954cac5740fbcf731ab3a096d8cae8a441a2196d073f9360cf64a38f3188","tlsh":"15a1755926ff60180693e2d4852f9416719afa5333c4d9d4fb4c76984f9a13883b29fc"}],"package_integrity":[{"filename":"sme-rko-finance-front-operations-income-35.8.1.tgz","hashes":{"sha512_sri":"sha512-oZOvkf7bWrg1zoCot1FZ22IQSTaCURC9GCe+Q2GYulu6AtjiamrYVQBywGB6hryviFBYJrLJur62RnSbzoHuJA==","sha1":"ffee4c102bee6ec00d3e342a5842fe419896f507"}}]}}}],"schema_version":"1.8.0","credits":[{"name":"Amazon Inspector","contact":["inspector-research@amazon.com"],"type":"FINDER"}]}