MAL-2026-12530

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/cardsmobile-command-utils/MAL-2026-12530.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12530
Published
2026-08-05T14:16:14Z
Modified
2026-08-05T14:35:01.127338537Z
Summary
Malicious code in cardsmobile-command-utils (npm)
Details

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

Source: amazon-inspector (36cfe57bdba8edd36f9303058545ce1097dd496f1c32304f1d8d912ccf321480)

On require(), index.js loads bridge.js which selects a platform-specific URL, downloads a binary over HTTPS from author-controlled Cloudflare Workers subdomains, writes it to a hidden temp path with a decoy name (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmods it to 0755, and spawns it detached via /bin/sh or cmd.exe. The destination hostnames are constructed via [...].join('') string-fragment obfuscation (e.g. ["oob-","worker.cf","102-baf.work","ers.d","ev"].join("") resolving to oob-worker.cf102-baf.workers.dev, plus oob-worker.cf101-adf.workers.dev and oob-worker.cf100-416.workers.dev) to defeat static searches for the C2 infrastructure. If HTTPS fetches fail, _bridge.js falls back to a DNS TXT covert channel: it queries a chunk count at c.<domain> and reassembles a base64-encoded payload from <i>.<domain> TXT records under attacker-controlled zones sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. No signature or hash verification is performed on the fetched bytes, decoy filenames masquerade as.NET diagnostics/cache artifacts, staging uses hidden dot-files, execution is detached, and the loader honors DONOT_TRACK to suppress activity on researcher machines. Cover-story comments (// Clean up temporary files after extraction, // Binary-safe buffer concatenation) are unrelated to the surrounding code.

Database specific 
{
    "malicious-packages-origins": [
        {
            "source": "amazon-inspector",
            "modified_time": "2026-08-05T14:16:14Z",
            "sha256": "36cfe57bdba8edd36f9303058545ce1097dd496f1c32304f1d8d912ccf321480",
            "id": "IN-MAL-2026-015233",
            "versions": [
                "35.9.2"
            ],
            "import_time": "2026-08-05T14:20:15.207529657Z"
        }
    ]
}
References
Credits

Affected packages

npm / cardsmobile-command-utils

Package

Name
cardsmobile-command-utils
View open source insights on deps.dev
Purl
pkg:npm/cardsmobile-command-utils

Affected ranges

Affected versions

35.*
35.9.2

Database specific

cwes 
[
    {
        "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-yRxw+DA12C2GiBhF0gedPsg6r6kUu/lFRiI8NjOsv5W9HNYKfDWbtokZKcO3Skt6m1zvBn9qFb/q2bQj9Dbyvw==",
                "sha1": "19ff43ea00d52f846b30f3eab8c7d50a270a2817"
            },
            "filename": "cardsmobile-command-utils-35.9.2.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_bridge.js",
            "sha256": "c8aeaf634d924ac27ca33ea2fc9d0b48588d278df00de388d24b5ba3a4bc8806",
            "tlsh": "50a1a75602a6b0184bb0e7e4c7179815f65bf66337818284fb5c69985fb3524c3b2efc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/cardsmobile-command-utils/MAL-2026-12530.json"