MAL-2026-12958

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-independent-bnpl-items/MAL-2026-12958.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12958
Published
2026-08-05T14:44:26Z
Modified
2026-08-05T15:51:16.955239165Z
Summary
Malicious code in bnpl-blocks-independent-bnpl-items (npm)
Details

-= Per source details. Do not edit below this line.=-

Source: amazon-inspector (9b068b10c6608e86812242f222c2936a85aae90776b6c71298731c16f8d7ae31)

On require() of this package, index.js loads runtime.js which selects a platform-specific asset, fetches an opaque binary from one of three obfuscated Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev) assembled at runtime via string-array.join to evade static matching, writes it to /tmp or %TEMP% under a cover-story name (dotnetdiag<rand>.exe on Windows,.cache<rand> on Unix), chmods 0755, and spawns it detached via /bin/sh -c or cmd. A TTL lockfile named.analytics_state masquerades the persistence as telemetry. If HTTPS egress is blocked, _runtime.js falls back to a DNS-TXT covert channel under author-controlled subdomains (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), reassembling a base64 payload from numbered TXT records and executing it. No hash or signature verification is performed on the fetched bytes. The README describes only a trivial abstraction class, unrelated to any of the observed network or execution behavior.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "9b068b10c6608e86812242f222c2936a85aae90776b6c71298731c16f8d7ae31",
            "id": "IN-MAL-2026-015422",
            "modified_time": "2026-08-05T14:44:26Z",
            "source": "amazon-inspector",
            "import_time": "2026-08-05T15:19:50.540607161Z",
            "versions": [
                "35.9.3"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-independent-bnpl-items

Package

Name
bnpl-blocks-independent-bnpl-items
View open source insights on deps.dev
Purl
pkg:npm/bnpl-blocks-independent-bnpl-items

Affected ranges

Affected versions

35.*
35.9.3

Database specific

indicators 
{
    "evidence_files": [
        {
            "sha256": "f74965134839ef3506fe89df62fa375ea8bee3d257b8eeac349fcd2a46d058dd",
            "path": "_runtime.js",
            "tlsh": "cda1a69a16b670194bb09be4cb17441af65be6633380c294fb6ca5945f73124c372efc"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-0snaK4fEAUcJlHyGK+7lJAfj7MxUd6hI2w6b93iFbU7UHHL79EKfIpcFcjuzrvhqQSG+mFYvU2Jo90tiWWXwiQ==",
                "sha1": "0b3b4f61ce87f513688866ada56e1242e81f19eb"
            },
            "filename": "bnpl-blocks-independent-bnpl-items-35.9.3.tgz"
        }
    ]
}
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-independent-bnpl-items/MAL-2026-12958.json"