MAL-2026-12977

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-mobile-bnpl-action-panel/MAL-2026-12977.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12977
Published
2026-08-05T14:40:41Z
Modified
2026-08-05T15:51:25.025410914Z
Summary
Malicious code in bnpl-blocks-mobile-bnpl-action-panel (npm)
Details

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

Source: amazon-inspector (f3362a69d0a3341fff7a48ebdd4a8231ec5a365dc237c62a5b95619fe051e762)

On require(), index.js loads bootstrap.js, which selects a per-platform payload path, fetches a binary over HTTPS from hardcoded hosts assembled by concatenating short string fragments (oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev) with a DNS-TXT fallback that reassembles base64 chunks across numbered subdomains of sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to /var/tmp or the Windows TEMP directory under cover-story names (.cache<hex>, dotnetdiag<hex>.exe), chmod 0755 on POSIX, then spawned detached via /bin/sh -c or cmd.exe. Host strings and API surface are split across arrays and reassembled via.join("") (e.g. require("child_"+"process"), fs["chmod"+"Sync"]) to evade static analysis. A second dropper module lib/telemetry.js (81 KB) is bundled but not require()d in this version; it mirrors the same DNS discovery, HTTPS+base64 reassembly, chmod, and detached /bin/sh spawn pattern under an "Analytics SDK" framing. Package name and file names impersonate a mobile BNPL UI component and telemetry/analytics tooling; the actual behavior is unverified remote-binary execution on any host that installs or imports the package.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-05T14:40:41Z",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-015396",
            "import_time": "2026-08-05T15:19:49.133997641Z",
            "sha256": "f3362a69d0a3341fff7a48ebdd4a8231ec5a365dc237c62a5b95619fe051e762",
            "versions": [
                "35.8.6"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-mobile-bnpl-action-panel

Package

Name
bnpl-blocks-mobile-bnpl-action-panel
View open source insights on deps.dev
Purl
pkg:npm/bnpl-blocks-mobile-bnpl-action-panel

Affected ranges

Affected versions

35.*
35.8.6

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "bnpl-blocks-mobile-bnpl-action-panel-35.8.6.tgz",
            "hashes": {
                "sha512_sri": "sha512-iCDLOQzmi1oW4HymssDym1P/giBDL4SfzG61DRGCbjH1NIPxzd/pdF8s7BvDGxHJ7KJLWSfYWDChYzgNPESsog==",
                "sha1": "521099a82acbd660bcd3b1f4f636dd0dec2ef165"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "82a1979a12a971184bb0a7e4c7174416f55bf6633780c2d4fb9c69d81fb2024c2b2efc",
            "sha256": "09d90d4969940f4bcfdd6b054652f2718d4a256286efc919c2f9743375ada6ad",
            "path": "_bootstrap.js"
        },
        {
            "tlsh": "88835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "c14e6d47573e3cfde64e6be4a5749e2883a127a57bd086f5db865238272869cf",
            "path": "lib/telemetry.js"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-mobile-bnpl-action-panel/MAL-2026-12977.json"
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]