MAL-2026-12900

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-container/MAL-2026-12900.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12900
Published
2026-08-05T14:53:33Z
Modified
2026-08-05T15:50:49.195523807Z
Summary
Malicious code in bnpl-blocks-atom-container (npm)
Details

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

Source: amazon-inspector (d0bf90f9ba8f401c6300846c2e5fa3af2afd241fba5d967300272a8dc7eadec7)

On require() of bnpl-blocks-atom-container, index.js loads adapter.js which selects a platform-specific target path, downloads an opaque binary from one of four Cloudflare Workers hosts whose names are reconstructed at runtime from split string fragments (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), writes it to /var/tmp or %TEMP% under cover-story filenames ('dotnetdiag<hex>.exe' on Windows, '.cache<hex>' on Unix), chmods 0755, and spawns it detached via '/bin/sh -c <fp> &' or 'cmd.exe /c start /b <fp>'. A stamp file named '.analytics_state' under /tmp gates re-execution. When HTTPS delivery fails, the loader falls back to a DNS-over-TXT channel against *.dl.wel1.ru (sdk./ext./pkg./net.dl.wel1.ru): it reads a chunk count from a 'c.<domain>' TXT record, retrieves N indexed base64 TXT records, concatenates and base64-decodes them into the payload bytes, and executes the result. Hostname obfuscation, disguised staging filenames, and a redundant covert DNS delivery channel are consistent with evasion of both static scanners and HTTP egress controls, not with any legitimate SDK loader.

Database specific 
{
    "malicious-packages-origins": [
        {
            "source": "amazon-inspector",
            "modified_time": "2026-08-05T14:53:33Z",
            "id": "IN-MAL-2026-015484",
            "import_time": "2026-08-05T15:19:53.843749023Z",
            "sha256": "d0bf90f9ba8f401c6300846c2e5fa3af2afd241fba5d967300272a8dc7eadec7",
            "versions": [
                "35.7.4"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-atom-container

Package

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

Affected ranges

Affected versions

35.*
35.7.4

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-container/MAL-2026-12900.json"
indicators 
{
    "package_integrity": [
        {
            "filename": "bnpl-blocks-atom-container-35.7.4.tgz",
            "hashes": {
                "sha512_sri": "sha512-olaIuoKTjjUqWCTygC5KNA2BNSbszpxxdFAhY1tuvXGi0JABJ+YXONgzpEpFQpCyMWIKeI4/CLEm2/PyzGbZ/Q==",
                "sha1": "6426386716d5dec0784bf8dadada0d9703fd16e7"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "13a1a65a11a6701c8bb0ebe4c7175815f65bf76333808288fb9c69985fb216483b2dfc",
            "sha256": "447433885bf158995961c7348e86a596a5ecb5f671cd7d5199872300ce13d08d",
            "path": "_adapter.js"
        }
    ]
}
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]