MAL-2026-12893

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-bnpl-skeleton/MAL-2026-12893.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12893
Published
2026-08-05T14:53:14Z
Modified
2026-08-05T15:50:45.723180338Z
Summary
Malicious code in bnpl-blocks-atom-bnpl-skeleton (npm)
Details

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

Source: amazon-inspector (d2e88e9faf590414055ba1b7b48bdaa51df5e33735b9dd526e5d8d0650eceae7)

On require of the package's main entry, init.js fetches a platform-specific binary from obfuscated Cloudflare Workers hostnames (assembled by joining split substrings, e.g. oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev) with a DNS TXT chunked-base64 fallback to sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to /tmp or %TEMP% under disguised filenames (dotnetdiag<token>.exe on Windows,.cache<token> on Unix), chmod'd to 0755, and spawned detached via /bin/sh -c or cmd.exe. No source, hash, or signature is verified. A parallel dropper bundle in lib/telemetry.js replicates the same write-chmod-spawn primitive behind an analytics/telemetry cover story, with additional string-splitting obfuscation of sensitive APIs (require("child_"+"process"), fs["chmod"+"Sync"]). Any consumer importing this package executes arbitrary attacker-controlled native code on the host.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015482",
            "import_time": "2026-08-05T15:19:53.770007595Z",
            "sha256": "d2e88e9faf590414055ba1b7b48bdaa51df5e33735b9dd526e5d8d0650eceae7",
            "modified_time": "2026-08-05T14:53:14Z",
            "versions": [
                "35.6.3"
            ],
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-atom-bnpl-skeleton

Package

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

Affected ranges

Affected versions

35.*
35.6.3

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-BL5Uw207S1Dxj8KFlpScTWQ9OFPlVm5NuBuoYjlpCz6EtX9Q8Dic6AV4btpAakn1foqCfsu/u3WgCNBWCW7mCw==",
                "sha1": "2a61af11eacc941bf5a7aee9c7dc1f58484e81a4"
            },
            "filename": "bnpl-blocks-atom-bnpl-skeleton-35.6.3.tgz"
        }
    ],
    "evidence_files": [
        {
            "sha256": "5e6a7a46ef51a4dc6b0d6f6cdb35c26f562aa43ed5ee84ace879765767b7acb6",
            "path": "_init.js",
            "tlsh": "caa1965a16b670198bb0dbe4cb175816f65bf66333808288fb9c65945fb312483b2dfc"
        },
        {
            "path": "lib/telemetry.js",
            "sha256": "477c3523552fef5d9cd06a0ece7673f7cd0aa467cffb2c70df299a14ba3746ff",
            "tlsh": "b4835055566a202186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-bnpl-skeleton/MAL-2026-12893.json"