MAL-2026-12912

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-desktop-bnpl-anchor-title/MAL-2026-12912.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12912
Aliases
  • GHSA-55g4-q5c3-783j
Published
2026-08-05T14:50:35Z
Modified
2026-08-10T00:50:11.308473049Z
Summary
Malicious code in bnpl-blocks-desktop-bnpl-anchor-title (npm)
Details

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

Source: amazon-inspector (67f1356b6c4fb134c3e3a35f562fe646d5db925c24354f286159be061213013c)

On require() of this package, _bootstrap.js downloads a platform-specific binary from author-controlled Cloudflare Workers hosts (oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev) and fallback hosts under dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), writes it to a temp path, sets it executable (chmod 0755), and spawns it detached via /bin/sh -c (with a cmd branch for Windows). The destination hostnames and API names are reassembled at runtime from split string fragments (e.g. ["oob-wo","rker.cf1","01-adf",".wo","rkers",".dev"].join(""), fs["chmod"+"Sync"]) to evade literal-string scanning. The binary is fetched unpinned and unverified from non-publisher infrastructure; the package presents an analytics/telemetry cover story. lib/telemetry.js contains parallel dropper primitives (base64-chunked reassembly, chmod-to-755, detached /bin/sh spawn) as a staged variant.

Source: ghsa-malware (7bb822811593f71f73b902dd97533951c4852a161f16e71e100291d388792fc5)

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": [
        {
            "id": "IN-MAL-2026-015463",
            "modified_time": "2026-08-05T14:50:35Z",
            "import_time": "2026-08-05T15:19:52.832057715Z",
            "source": "amazon-inspector",
            "sha256": "67f1356b6c4fb134c3e3a35f562fe646d5db925c24354f286159be061213013c",
            "versions": [
                "35.2.5"
            ]
        },
        {
            "id": "GHSA-55g4-q5c3-783j",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "modified_time": "2026-08-08T17:27:56Z",
            "import_time": "2026-08-09T23:21:54.442173Z",
            "source": "ghsa-malware",
            "sha256": "7bb822811593f71f73b902dd97533951c4852a161f16e71e100291d388792fc5"
        }
    ]
}
References
Credits

Affected packages

npm / bnpl-blocks-desktop-bnpl-anchor-title

Package

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

Affected ranges

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

Affected versions

35.*
35.2.5

Database specific

cwes 
[
    {
        "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.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "package_integrity": [
        {
            "filename": "bnpl-blocks-desktop-bnpl-anchor-title-35.2.5.tgz",
            "hashes": {
                "sha512_sri": "sha512-ROEEG2f150rcSRrT16EAPxls5B88gXWx7gIhF7nKuLiLflsd6RHoXr4dnfAsDNF4QNCdBWJgjvWV94A+/nMhFA==",
                "sha1": "39de669e0c6ab0694782afeafb308a6debf42a16"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "_bootstrap.js",
            "tlsh": "43a1979a16aa30094bb0d7e5c71b4416f69bf66333809288fb9c65941f7343483b2efc",
            "sha256": "3ee05aee6578c010a2287e2bed22f886b72d7d5910caaffa2b562dac674338d5"
        },
        {
            "path": "lib/telemetry.js",
            "tlsh": "26835055566a602186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "fe05676e068db56bd7e7a7667b45574782b135162a4d754f8c89193971684f98"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bnpl-blocks-desktop-bnpl-anchor-title/MAL-2026-12912.json"