boxy-expander-contract

{"modified":"2026-08-05T14:32:48Z","published":"2026-08-05T14:32:48Z","schema_version":"1.7.4","id":"MAL-2026-13043","summary":"Malicious code in boxy-expander-contract (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (d1f5856de3b0385535e80e5ef85627ecb7a087132c82c5d5457b35b62b9eaf72)\nOn require() of this package, index.js loads./_runtime.js which assembles Cloudflare Workers hostnames via string-split.join('') fragments (e.g. oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev) with a DNS-TXT fallback under *.dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), downloads a platform-specific binary via https.get, writes it to /tmp or %TEMP% under a name masquerading as system tooling (dotnet_diag_*.exe,.cache_*), chmods 755 on unix, and spawns it detached via spawn('/bin/sh', ['-c',...]) or spawn('cmd',...). No hash or signature verification is performed and destination hosts are string-fragmented to evade static analysis. The package's advertised API is an unrelated decoy stub.\n","affected":[{"package":{"ecosystem":"npm","name":"boxy-expander-contract"},"versions":["35.5.3"],"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":"_runtime.js","sha256":"b22506f9a48dbac4c97f0479d42c1fc6fdb4b6b1947940fdb75d1069db617979","tlsh":"94b1775a165670194fb0a7e0c61b8416f65bf5633681c2c4f75c69845f73528c3b2efc"}],"package_integrity":[{"filename":"boxy-expander-contract-35.5.3.tgz","hashes":{"sha1":"2b1f3947d67c053e7c32d04747595b1eb239e93f","sha512_sri":"sha512-a0dXVu5Nt8+nsqyYgrYj1D9/d249tkldhgW1CUSL7MiYHxmTKXowdZdPLTvYAgeJbedSJNq9L2bKyfRzmjyDRA=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/boxy-expander-contract/v/35.5.3"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-015344","import_time":"2026-08-05T15:19:45.992005532Z","modified_time":"2026-08-05T14:32:48Z","sha256":"d1f5856de3b0385535e80e5ef85627ecb7a087132c82c5d5457b35b62b9eaf72","source":"amazon-inspector","versions":["35.5.3"]}]}}