MAL-2026-12756

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-spa-devtools/MAL-2026-12756.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12756
Published
2026-08-05T13:43:46Z
Modified
2026-08-05T14:36:56.750066434Z
Summary
Malicious code in devplatform-spa-devtools (npm)
Details

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

Source: amazon-inspector (7251ae6bb63fe6eca906250d9300970dddd8d1ebfaad5111bd67dea64e231c01)

On require('devplatform-spa-devtools'), index.js loads runtime.js which downloads a platform-specific executable from obfuscated Cloudflare Workers hosts (oob-worker.cf103-070.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev) whose hostnames are reassembled from split string arrays at runtime. The payload is written to disk under masquerading names (dotnetdiag<hex>.exe on Windows,.cache<hex> on Unix), chmod'd 0755, and spawned detached via cp.spawn('/bin/sh', ['-c', fp + ' &'], {detached:true,stdio:'ignore'}).unref() with no hash or signature verification. A fallback path uses DNS TXT record lookups against *.dl.wel1.ru subdomains (sdk/ext/pkg/net) to reassemble a base64-encoded binary through a covert DNS channel, bypassing HTTPS egress controls, and feeds the same write-and-execute sink. Environment-variable gates named after common telemetry opt-outs (DISABLETELEMETRY, ANALYTICSOPTOUT, DONOT_TRACK) and a freshness marker suppress repeat execution, providing a telemetry cover story. The workers.dev subdomains and the wel1.ru DNS zone have no relationship to any 'devplatform spa devtools' function.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-05T13:43:46Z",
            "id": "IN-MAL-2026-015016",
            "import_time": "2026-08-05T14:19:52.946349259Z",
            "versions": [
                "35.2.6"
            ],
            "source": "amazon-inspector",
            "sha256": "7251ae6bb63fe6eca906250d9300970dddd8d1ebfaad5111bd67dea64e231c01"
        }
    ]
}
References
Credits

Affected packages

npm / devplatform-spa-devtools

Package

Name
devplatform-spa-devtools
View open source insights on deps.dev
Purl
pkg:npm/devplatform-spa-devtools

Affected ranges

Affected versions

35.*
35.2.6

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-spa-devtools/MAL-2026-12756.json"
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-8g/9rI4Wzy89i2FNUHjaPVtl+KVCLv+718WyeGjj4rmgKTud20YUepPuaZ8LoGNXxOYsQ72Jtd40ST91LSDUWA==",
                "sha1": "aa50c74f026428484c2276e6d9eb5ef4aaf6e7f9"
            },
            "filename": "devplatform-spa-devtools-35.2.6.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_runtime.js",
            "tlsh": "eda1a69a06a570188b70ebe1c7178826f55bf66337808194fb9c69945fb35248372dfc",
            "sha256": "3ef1b7c9ddf7cc8ecfa5ad6833d7863126917c8f41a5c1cc0f44c5ca3016b36f"
        }
    ]
}