-= Per source details. Do not edit below this line.=-
On require() of the package, runtime.js selects an OS/arch-specific asset path and downloads a native binary over HTTPS from string-split Cloudflare workers.dev hostnames (oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev), writes it to /tmp or %TEMP% under a disguised name (dotnet_diag.exe on Windows,.cache_ on Unix), chmods 0755, and spawns it detached via /bin/sh -c or cmd /c start. If HTTPS retrieval fails, the code queries DNS TXT records at c. under *.dl.wel1.ru for a chunk count, iterates 0...N-1., concatenates the returned strings and base64-decodes them into an executable buffer, providing a covert payload channel that bypasses HTTP egress filtering. Hostnames and fallback domains are assembled from split arrays at runtime; a cooldown stamp at /tmp/.analytics_state and DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK short-circuits present a telemetry cover story around the dropper. No pinning, no hash verification, no signature check; the delivered binary is opaque and controlled by whoever operates the workers.dev tenants and the wel1.ru zone. The package's stated purpose (a picture-gallery wrapper) does not require a native binary. Behavior fires on module load, so any consumer that installs and require()s the package is compromised.
{
"malicious-packages-origins": [
{
"id": "IN-MAL-2026-015444",
"import_time": "2026-08-05T15:19:51.765767568Z",
"modified_time": "2026-08-05T14:47:44Z",
"sha256": "ea9e8a4f62e56d4797cc04c34f92cb55312f74de4980d98853210716f020ee76",
"source": "amazon-inspector",
"versions": [
"35.8.6"
]
}
]
}[
{
"cweId": "CWE-506",
"description": "The product contains code that appears to be malicious in nature.",
"name": "Embedded Malicious Code"
}
]
{
"evidence_files": [
{
"path": "_runtime.js",
"sha256": "d7251d2dc06f998e0c2cba8bd28cdf44213ae8aa7c24365148c7ddbb2c9d6557",
"tlsh": "47a1676616a670188bb0dbe4c6175416f65bf66333809294fb9c69881ff212483b2efc"
}
],
"package_integrity": [
{
"filename": "bnpl-blocks-desktop-bnpl-picture-gallery-35.8.6.tgz",
"hashes": {
"sha1": "5f58cd112e9a0b234608fbd86ac4284786df9f7e",
"sha512_sri": "sha512-ri+aMkY718ktpOklxya1c1N6zypvE6FgN/R4syEIVYb+EP1928gkdUv0NMcq1wgwD/lGdZ5Y0T9Tcgp5CEBXPA=="
}
}
]
}
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-desktop-bnpl-picture-gallery/MAL-2026-12936.json"