MAL-2026-12534

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/cardsmobile-notifications/MAL-2026-12534.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12534
Published
2026-08-05T14:16:22Z
Modified
2026-08-05T14:35:04.854527406Z
Summary
Malicious code in cardsmobile-notifications (npm)
Details

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

Source: amazon-inspector (5a75c5659b227cbea7e622e9c5613594e590fae0580db08420e9f2493b2fd3d2)

On require() of cardsmobile-notifications, index.js loads support.js which fetches an OS/arch-specific executable from a rotating list of obfuscated Cloudflare Workers endpoints (oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev), with a DNS TXT covert-channel fallback that assembles a base64 payload from numbered subdomains under sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The downloaded bytes are written to /var/tmp or %TEMP% under disguised names (dotnetdiag_*.exe,.cache_*), chmod 0755, and spawned detached via cp.spawn("/bin/sh", ["-c", fp + " &"], {detached:true}).unref(). No hash or signature verification is performed; the destinations are not the publisher; the C2 hostnames are assembled via string-split.join("") to evade static matching. A second 81KB module lib/telemetry.js, disguised as an APM/telemetry SDK, contains the same base64-decode + chmod 0755 + /bin/sh spawn pattern; it is not reached from index.js in this version but is armed and could be re-wired by a future release.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "5a75c5659b227cbea7e622e9c5613594e590fae0580db08420e9f2493b2fd3d2",
            "id": "IN-MAL-2026-015234",
            "modified_time": "2026-08-05T14:16:22Z",
            "source": "amazon-inspector",
            "import_time": "2026-08-05T14:20:15.290568938Z",
            "versions": [
                "35.7.6"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / cardsmobile-notifications

Package

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

Affected ranges

Affected versions

35.*
35.7.6

Database specific

indicators 
{
    "evidence_files": [
        {
            "sha256": "97cb20f88e8535c3cbd9143d4d60d63976d64e77ee1d8fdef90415340c1ca4fe",
            "path": "_support.js",
            "tlsh": "b8b1b79a02a6701c4b70ebe4c71b4826f55af6633781c294f79c69885fb352483b1efc"
        },
        {
            "sha256": "a77d54094827817cf1170226e8305ca9811d52918a156dc7f7dc9c7d6c75d242",
            "path": "lib/telemetry.js",
            "tlsh": "20835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-MqxwVQ2F20Vzg/uY6hL+FimQXGldc4EFHpyCdI23cOGhCqSRYJA+9S1ORsyxPoIAmIUKkLGUcFiTfTXMeOCu2w==",
                "sha1": "64feaead615e94c4a0210536dcac83c00313b74f"
            },
            "filename": "cardsmobile-notifications-35.7.6.tgz"
        }
    ]
}
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/cardsmobile-notifications/MAL-2026-12534.json"