MAL-2026-12988

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-mobile-bnpl-feedback/MAL-2026-12988.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12988
Published
2026-08-05T14:41:24Z
Modified
2026-08-05T15:51:30Z
Summary
Malicious code in bnpl-blocks-mobile-bnpl-feedback (npm)
Details

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

Source: amazon-inspector (28f1214c6f46b90fa1bf81bde9a79c81a5193e84969ef756f50cbf895c49515b)

On require of the package, index.js loads shim.js which selects a platform-specific binary from a list of string-split-obfuscated Cloudflare Workers hosts (reassembled at runtime, e.g. oob-worker.cf99-9b3.workers.dev), with a DNS-TXT chunked-base64 fallback across wel1.ru subdomains (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru; count served at c., parts at N.). The retrieved payload is written to /tmp or %TEMP% under cover names resembling system tooling (dotnet_diag.exe,.cache_), chmodded 0755 on POSIX, and spawned detached via spawn("/bin/sh",["-c", path+" &"],{detached:true}) or spawn("cmd",...) on Windows. The destinations are obfuscated, unrelated to any legitimate publisher, and the executed bytes are attacker-controlled.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015401",
            "import_time": "2026-08-05T15:19:49.369684619Z",
            "modified_time": "2026-08-05T14:41:24Z",
            "sha256": "28f1214c6f46b90fa1bf81bde9a79c81a5193e84969ef756f50cbf895c49515b",
            "source": "amazon-inspector",
            "versions": [
                "35.3.5"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-mobile-bnpl-feedback

Package

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

Affected ranges

Affected versions

35.*
35.3.5

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "_shim.js",
            "sha256": "5e8a3d5214ba7c3e458bbe888966db9676614fb5313709925b508c935a7fca4f",
            "tlsh": "77b1985a166670184bb0d7e4cb1b8825f56ef6533781c284f79c65885f7352483b2efc"
        }
    ],
    "package_integrity": [
        {
            "filename": "bnpl-blocks-mobile-bnpl-feedback-35.3.5.tgz",
            "hashes": {
                "sha1": "3438ece4d334b9baee0be5ee9922c4414d4cab92",
                "sha512_sri": "sha512-mZrvdoQGjhbgX8EShGmlC3tyI9bKboa5gXyoPSpM44v1cc2boGKZXRS0w0R+UXypXKC0pCwSoO94ZwgYu+sAAg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-mobile-bnpl-feedback/MAL-2026-12988.json"