devplatform-po-loader

{"modified":"2026-08-05T13:48:27Z","published":"2026-08-05T13:48:27Z","schema_version":"1.7.4","id":"MAL-2026-12732","summary":"Malicious code in devplatform-po-loader (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (185d53460e4ec6534c0b4c8f3de1c0eb2d0134eaf161d8e0211a46bca273ad69)\nOn require(), the package loads _platform.js which selects a platform-specific path (/pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe), downloads a binary over HTTPS from obfuscated Cloudflare Workers endpoints (oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev), writes it to /tmp or %TEMP% under disguised names (dotnet_diag_<tag>.exe on Windows,.cache_<tag> on Unix impersonating Microsoft dotnet-diag), chmods 0755, and spawns it detached via /bin/sh or cmd. Host names are reconstructed at runtime through split-string join to evade static analysis, and a fallback covert channel resolves TXT records under *.dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), reading a chunk count from c.<domain> and base64-decoding chunks from <i>.<domain> TXT records to reassemble and execute the payload. A marker file named.analytics_state and a 'Skip in CI environments' comment further disguise intent. The package advertises itself as a trivial loader library; the shipped code contains no library functionality — only the dropper.\n","affected":[{"package":{"ecosystem":"npm","name":"devplatform-po-loader"},"versions":["35.1.8"],"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":"_platform.js","sha256":"ded1108c032185dcd18adbc93721dbe9720a26aeea35e63e79417d92c1fbb5bc","tlsh":"51a19896166660188bb0d7e4872b4416f69bf66337c0c284fb9ca5981f7712883b2dfc"}],"package_integrity":[{"filename":"devplatform-po-loader-35.1.8.tgz","hashes":{"sha1":"ea41445694c8c0f1fbd92402802db59608070c61","sha512_sri":"sha512-JZvw6n/EFxeAHXZWapC+PwQYaMeeySbYAaIe9N1kHwZwCQUq6GOp/A8a/5sSdQKrULFJHhpZuu/fHOsVJIrRsA=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/devplatform-po-loader/v/35.1.8"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-015047","import_time":"2026-08-05T14:19:56.350524492Z","modified_time":"2026-08-05T13:48:27Z","sha256":"185d53460e4ec6534c0b4c8f3de1c0eb2d0134eaf161d8e0211a46bca273ad69","source":"amazon-inspector","versions":["35.1.8"]}]}}