MAL-2026-12880

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-bnpl-link-avatar/MAL-2026-12880.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12880
Aliases
  • GHSA-84vq-j25f-6x2p
Published
2026-08-05T14:54:42Z
Modified
2026-08-06T01:20:20.894479519Z
Summary
Malicious code in bnpl-blocks-atom-bnpl-link-avatar (npm)
Details

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

Source: amazon-inspector (3be43998de08cea356c696d856d5469ab529293a1899f1beed856d529200413d)

On require() of the package, index.js loads polyfill.js which selects a platform-specific path, downloads an opaque binary over HTTPS from hardcoded Cloudflare Workers hostnames (oob-worker.cf99-9b3.workers.dev, cf100-416.workers.dev, cf101-adf.workers.dev, cf103-070.workers.dev), with a DNS-TXT base64 fallback via sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The binary is written to /tmp or %TEMP% under disguised names (.cache<rnd> on POSIX, dotnetdiag<rnd>.exe on Windows), chmod 0755, and spawned detached via /bin/sh -c or cmd.exe /c start /b. There is no hash or signature verification and the destinations are not publisher-owned infrastructure. Destination hostnames are reassembled at runtime from string fragments joined together, a.analyticsstate marker file gates re-execution, and DISABLETELEMETRY / ANALYTICSOPTOUT / DONOTTRACK env vars are consulted as a cover story. The package's public API (index.js) is a no-op stub class and the name follows a scoped-ecosystem naming pattern, consistent with a dependency-confusion or typosquat lure whose sole effect on install is the dropper.

Source: ghsa-malware (1b2e43e08c24ca9804259a1260b633e5abffedfa4d04e2fa64a8cac94ca7f5bb)

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": [
        {
            "versions": [
                "35.4.8"
            ],
            "import_time": "2026-08-05T15:19:54.232186756Z",
            "id": "IN-MAL-2026-015492",
            "modified_time": "2026-08-05T14:54:42Z",
            "sha256": "3be43998de08cea356c696d856d5469ab529293a1899f1beed856d529200413d",
            "source": "amazon-inspector"
        },
        {
            "id": "GHSA-84vq-j25f-6x2p",
            "import_time": "2026-08-06T00:58:53.321446164Z",
            "sha256": "1b2e43e08c24ca9804259a1260b633e5abffedfa4d04e2fa64a8cac94ca7f5bb",
            "modified_time": "2026-08-05T16:57:54Z",
            "source": "ghsa-malware",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-atom-bnpl-link-avatar

Package

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

Affected ranges

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

Affected versions

35.*
35.4.8

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "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."
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-bnpl-link-avatar/MAL-2026-12880.json"
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha1": "6af4a45c487bf42579b029bccf942125f8ecddf2",
                "sha512_sri": "sha512-Wwcj1XnqPia2UTUyBpOQ+4ehvbcopPlZJwVzCrs8uNhc7LKRQ7mcSyDLfc+9uFSAcpIw2LTWbu+5jSX1Mray9w=="
            },
            "filename": "bnpl-blocks-atom-bnpl-link-avatar-35.4.8.tgz"
        }
    ],
    "evidence_files": [
        {
            "tlsh": "1cb1a56a15aa70184bb0d7e4c6175416f66af6637380c698f79ca58c0fb2124c3b2ffc",
            "sha256": "65f725747ea46aa0280c815a0d2707df2b84dd17c8028914ae51901e118a6902",
            "path": "_polyfill.js"
        },
        {
            "tlsh": "44d02e22882022b310b92901fe91c34ab2860f4e2134ad06bb73211840c24a900af336",
            "sha256": "b98de6599f212c67329d3aac4e2cf242ca553011f6e192ade063be314e389f73",
            "path": "package.json"
        }
    ]
}