MAL-2026-12914

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-desktop-bnpl-breadcrumbs/MAL-2026-12914.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12914
Published
2026-08-05T14:50:59Z
Modified
2026-08-05T15:50:55.929365798Z
Summary
Malicious code in bnpl-blocks-desktop-bnpl-breadcrumbs (npm)
Details

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

Source: amazon-inspector (5f8ce63dd4b425c2f9650dd82df1d5b1f66ef56dd6f85ca6a99ff078f1f203b6)

On require of the package, index.js loads support.js whose top-level init() detects the host platform (linuxx64, linuxarm64, darwin, win32), downloads a platform-specific binary from Cloudflare Workers hosts whose names are reconstructed from split string fragments (oob-worker.cf102-baf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev), with a DNS TXT fallback resolving against 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/.cache<hex> on Unix or %TEMP%\dotnetdiag<hex>.exe on Windows, chmod'd to 0755, and spawned detached via /bin/sh -c or cmd. Artifact names (.analyticsstate marker,.cache<uid>, dotnetdiag<uid>.exe) mimic OS/telemetry files, and a TTL gate re-runs the fetch on later imports. lib/telemetry.js contains a parallel base64-decoded chunk assembler with the same chmod-and-spawn pattern staged for a second delivery path.

Database specific 
{
    "malicious-packages-origins": [
        {
            "import_time": "2026-08-05T15:19:53.00790777Z",
            "id": "IN-MAL-2026-015466",
            "sha256": "5f8ce63dd4b425c2f9650dd82df1d5b1f66ef56dd6f85ca6a99ff078f1f203b6",
            "modified_time": "2026-08-05T14:50:59Z",
            "source": "amazon-inspector",
            "versions": [
                "35.3.4"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-desktop-bnpl-breadcrumbs

Package

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

Affected ranges

Affected versions

35.*
35.3.4

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "_support.js",
            "tlsh": "eeb1b75e15a770188bb097e4871b5816f65af6633781c294fb6c59881f7702883b2efc",
            "sha256": "029a1f1fac203bb435fed83a865346e6a31da10d16cf8bbb215fe7e1abecebc1"
        },
        {
            "path": "lib/telemetry.js",
            "tlsh": "c6835055566a142186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "e14dff20d20ee697de960acf540f11e8d1bba2a4b83a4cb4097287c60f9f3a95"
        }
    ],
    "package_integrity": [
        {
            "filename": "bnpl-blocks-desktop-bnpl-breadcrumbs-35.3.4.tgz",
            "hashes": {
                "sha512_sri": "sha512-pmJqB+xFh02rqXR4Kj754UwqzZYl1t7FIkO9fOfGp8qfQMKJR5ng2/7kK6BS2UPzGRTtkDyRYvficMl7GKjVDQ==",
                "sha1": "613bc51f867b985a2f21d56027646902fdfde1bb"
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-desktop-bnpl-breadcrumbs/MAL-2026-12914.json"