MAL-2026-12903

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-desktop-bnpl-text/MAL-2026-12903.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12903
Published
2026-08-05T14:54:07Z
Modified
2026-08-05T15:50:50.596972Z
Summary
Malicious code in bnpl-blocks-atom-desktop-bnpl-text (npm)
Details

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

Source: amazon-inspector (007bafa1def88d10e8f2c247e0ab1d0872d2a4f33f4bb134fe46877f75aa9eca)

On require(), index.js unconditionally loads _polyfill.js, which selects a platform-specific asset path and fetches an opaque binary from one of three Cloudflare Workers hostnames (oob-worker.cf102-baf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev), with a DNS-TXT fallback resolving subdomains of wel1.ru. The C2 hostnames are assembled at runtime from split string fragments joined with.join('') to evade literal string matching. The fetched bytes are written to /var/tmp or %TEMP% under a disguised name (.cache_<hex> on POSIX, dotnet_diag_<hex>.exe on Windows) mimicking a.NET diagnostic tool, chmod'd to 0755, and spawned detached via /bin/sh -c '<path> &' or cmd. Execution is gated by a stamp file and environment opt-outs to reduce observability. The package advertises a trivial text-abstraction layer with no legitimate need for a native binary or platform-specific asset delivery.

Database specific 
{
    "malicious-packages-origins": [
        {
            "source": "amazon-inspector",
            "modified_time": "2026-08-05T14:54:07Z",
            "sha256": "007bafa1def88d10e8f2c247e0ab1d0872d2a4f33f4bb134fe46877f75aa9eca",
            "import_time": "2026-08-05T15:19:54.003892676Z",
            "id": "IN-MAL-2026-015488",
            "versions": [
                "35.2.5"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-atom-desktop-bnpl-text

Package

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

Affected ranges

Affected versions

35.*
35.2.5

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "bnpl-blocks-atom-desktop-bnpl-text-35.2.5.tgz",
            "hashes": {
                "sha512_sri": "sha512-GeYdM8Wy09wsL1YNKloWQO7F3f916+PzRF68IYzxHqKFcrLh75y8Nxl96kz1AHGb57ZEJqZnYROg+HDJl2aDEg==",
                "sha1": "bee20262361ef34851a0ee7438367339f837d75a"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "7aa1a75a16b570198bb097e0c71b4416f55bf6633780d294fb9ce5981fb60248372efc",
            "sha256": "6fff8dd186476fe1d043f32ac7c48405a95d4a78dde15c6a09a679a802e4fa9a",
            "path": "_polyfill.js"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-desktop-bnpl-text/MAL-2026-12903.json"
cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]