MAL-2026-12863

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-bnpl-anchor-menu/MAL-2026-12863.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12863
Aliases
  • GHSA-h36f-584p-27fc
Published
2026-08-05T14:58:13Z
Modified
2026-08-06T01:20:13.616275057Z
Summary
Malicious code in bnpl-blocks-atom-bnpl-anchor-menu (npm)
Details

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

Source: amazon-inspector (2c841de8c355f3970534d5ec0f0c5eb63ed72a4d70f8d715c2e781c276acdb20)

On require of bnpl-blocks-atom-bnpl-anchor-menu, index.js loads loader.js which assembles hostnames from split-string arrays (evading static analysis), selects a platform-specific asset, and downloads an opaque executable via https.get from Cloudflare Workers subdomains (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS-TXT base64 fallback resolving sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The fetched bytes are written to /tmp or the Windows temp directory under cover-story names (dotnetdiag_*.exe,.cache_*), chmodded 0755 on POSIX, and spawned detached via cp.spawn("/bin/sh", ["-c", fp + " &"], {detached:true}).unref() (spawn("cmd") equivalent on Windows). The package's declared purpose is a UI anchor menu, which does not require fetching or executing native binaries from anonymous workers.dev hosts. A sibling module lib/telemetry.js contains a parallel dropper implementation with the same chmod-and-spawn primitives, activating if imported directly. The combination of split-string obfuscation of destination hosts, cover-story staging paths, anonymous workers.dev C2 with a Russian DNS-TXT covert channel, and unconditional execute-on-require constitutes remote code execution against every installer that requires the package.

Source: ghsa-malware (cb0a2a338cec3acc8e3df0a205b6347da0126989108e486dddfdebe1c64e043c)

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",
            "modified_time": "2026-08-05T14:58:13Z",
            "sha256": "2c841de8c355f3970534d5ec0f0c5eb63ed72a4d70f8d715c2e781c276acdb20",
            "id": "IN-MAL-2026-015516",
            "versions": [
                "35.8.5"
            ],
            "import_time": "2026-08-05T15:19:55.666813165Z"
        },
        {
            "import_time": "2026-08-06T00:58:53.380805925Z",
            "sha256": "cb0a2a338cec3acc8e3df0a205b6347da0126989108e486dddfdebe1c64e043c",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "id": "GHSA-h36f-584p-27fc",
            "modified_time": "2026-08-05T20:08:53Z",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-atom-bnpl-anchor-menu

Package

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

Affected ranges

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

Affected versions

35.*
35.8.5

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 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-iJqNBaftAi4dBm31HjaDTMaKVnIfzIjYq5t/UUBtcgW5N2q/W/OaFGWx76cwdmdyXJstoFYsnUXariQFI78HEw==",
                "sha1": "b5cd2afe11293e6aaa65b9fb95c07908ad4af01b"
            },
            "filename": "bnpl-blocks-atom-bnpl-anchor-menu-35.8.5.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_loader.js",
            "sha256": "0fea37deff54b7cbace0e02b2858582fa7edc791215766eef1ebbc5619d3e2bc",
            "tlsh": "c9a1c99a066bb0194bb09be4c7274425f65be26337c1c284fb5ca5985f7612483b2efc"
        },
        {
            "path": "lib/telemetry.js",
            "sha256": "0475b81b708df24f95bd7b5c38a38ceb036e23a36654bae8665aeaa7c26a0da0",
            "tlsh": "aa835056566a142186b2b378df234107ff3685272642429dbafc82dc1fbd72092a5ffc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-atom-bnpl-anchor-menu/MAL-2026-12863.json"