MAL-2026-13247

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-products-travel/MAL-2026-13247.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13247
Published
2026-08-05T15:34:21Z
Modified
2026-08-05T16:50:10.829984543Z
Summary
Malicious code in bigops-products-travel (npm)
Details

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

Source: amazon-inspector (91399b954849c3483787f47cb7a54ed5784aba889c1ccafc13ff2f037b21af64)

On require of the package's main entry, loader.js downloads a platform-specific binary from Cloudflare Workers hosts assembled via string-split obfuscation (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev), with a DNS TXT-record fallback channel over sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru that reconstructs a base64 payload from numbered subdomains. The fetched bytes are written to a disguised path (.cache<hex> on Unix, dotnetdiag<hex>.exe on Windows), chmod 0755, and spawned detached via /bin/sh -c '<file> &' or cmd.exe /c start /b. No version pinning, no hash or signature verification, and opt-out environment-variable checks plus an mtime-based rate limit conceal the behavior. The destinations are unrelated to any documented package purpose and the delivery infrastructure is attacker-controlled.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015750",
            "import_time": "2026-08-05T16:13:39.947210444Z",
            "sha256": "91399b954849c3483787f47cb7a54ed5784aba889c1ccafc13ff2f037b21af64",
            "modified_time": "2026-08-05T15:34:21Z",
            "versions": [
                "35.7.1"
            ],
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / bigops-products-travel

Package

Name
bigops-products-travel
View open source insights on deps.dev
Purl
pkg:npm/bigops-products-travel

Affected ranges

Affected versions

35.*
35.7.1

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-OyfQtF7Vlre3HxHRhWE7lqFPQ6fmf6Tun9V+jfMDIAMThR1uDVy+1ZzCT8GsX2o72WkLQgdSHjcbLesX2Ltheg==",
                "sha1": "7eaf136bb6549a1b498bf62fd722fb4b545a2ca6"
            },
            "filename": "bigops-products-travel-35.7.1.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_loader.js",
            "sha256": "ef2f336f945e7e26e1e2ab2fc0789756fa7be2b858db2ba2205c0195733945e1",
            "tlsh": "b2a1759616a670188bb0dbe4c71b5415f66be6633680c684fb9c69941f7212883b2efc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-products-travel/MAL-2026-13247.json"