MAL-2026-12874

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-bnpl-fade-overflow/MAL-2026-12874.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12874
Aliases
  • GHSA-cmmv-wrqx-q5f8
Published
2026-08-05T14:57:14Z
Modified
2026-08-06T01:20:18.209761763Z
Summary
Malicious code in bnpl-blocks-atom-bnpl-fade-overflow (npm)
Details

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

Source: amazon-inspector (f78c9360e199f852a5b395b6549e12b6334ec3dce096462a4404a3a0e809f545)

On require() of this package, index.js loads runtime.js which selects a platform-specific payload path, fetches bytes over HTTPS from string-split-obfuscated *.workers.dev mirrors (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT chunked-base64 fallback via sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru, writes the bytes to /var/tmp/.cache<rand> or %TEMP%\dotnetdiag<rand>.exe, chmods 0755, and spawns the file detached via /bin/sh -c or cmd.exe /c start. Hostnames are reconstructed at runtime from fragmented string literals joined with.join("") to evade static matching. lib/telemetry.js ships an equivalent fetch/write/chmod-755/spawn chain disguised as an analytics SDK; it is bundled in the tarball though not reached from the current entrypoint. The staged filenames (dotnetdiag.exe,.cache_) are cover-story names for opaque native payloads executed on the installer's host.

Source: ghsa-malware (69f76ef9cc60214327c95cd87319672e0f624c8d2cb60f50081ac9776f43ea71)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Database specific 
{
    "malicious-packages-origins": [
        {
            "source": "amazon-inspector",
            "import_time": "2026-08-05T15:19:55.32635753Z",
            "id": "IN-MAL-2026-015509",
            "modified_time": "2026-08-05T14:57:14Z",
            "versions": [
                "35.7.2"
            ],
            "sha256": "f78c9360e199f852a5b395b6549e12b6334ec3dce096462a4404a3a0e809f545"
        },
        {
            "sha256": "69f76ef9cc60214327c95cd87319672e0f624c8d2cb60f50081ac9776f43ea71",
            "import_time": "2026-08-06T00:58:53.353806714Z",
            "source": "ghsa-malware",
            "modified_time": "2026-08-05T20:06:57Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "id": "GHSA-cmmv-wrqx-q5f8"
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-atom-bnpl-fade-overflow

Package

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

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

35.*
35.7.2

Database specific

cwes 
[
    {
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature."
    },
    {
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "_runtime.js",
            "tlsh": "69b184a6156670184bb0dbe4c71b5416f65af6632780c598fb9c69884fb2124c2b2efc",
            "sha256": "40cd7d4e820dac863756af5d9e76e8c9dfc4600832b0b8d602c853fec97916ff"
        },
        {
            "path": "lib/telemetry.js",
            "tlsh": "9d835056566a142186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "d35e23b5654d605fd01a46949e316041c801ee6b878c839b05a896559850593b"
        }
    ],
    "package_integrity": [
        {
            "filename": "bnpl-blocks-atom-bnpl-fade-overflow-35.7.2.tgz",
            "hashes": {
                "sha1": "872c7ab7ea02b3be6613b1b6a5579a31566b7af4",
                "sha512_sri": "sha512-6u8qBxKE8vKwHzYBVVd4vmKIzKsmH0crR0ae2cRa78W+b7v+A5gSaqMBvjgZwlDIoCe7I9Bcf/GzjAwqzkhLKA=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-bnpl-fade-overflow/MAL-2026-12874.json"