MAL-2026-13204

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dwsai-dwsai-core/MAL-2026-13204.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13204
Published
2026-08-05T15:08:10Z
Modified
2026-08-05T15:53:11.918585273Z
Summary
Malicious code in dwsai-dwsai-core (npm)
Details

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

Source: amazon-inspector (4d9ec945df21e9ec2a52fc5dccf5b2d8f734c53aba8c9b6bd14f515c8e4a4fc8)

On require('dwsai-dwsai-core'), index.js loads adapter.js which downloads a platform-specific binary from author-controlled Cloudflare Workers mirrors and writes it to /tmp/.cache<rnd> on Linux/macOS or %TEMP%/dotnetdiag<rnd>.exe on Windows (masquerading as the Microsoft dotnet diagnostic tool). The file is chmodded 0755 and spawned detached via /bin/sh -c or cmd.exe, with stdio ignored and unref(). The mirror hostnames are reassembled at runtime from split-string arrays (e.g. ['oob-worker.cf100-41','6.worke','rs.de','v'].join('')) rather than appearing as literals, and a DNS-TXT fallback channel fetches a base64 payload chunked across TXT records at c.*.dl.wel1.ru via dns.resolveTxt to bypass HTTPS egress filtering. No hash or signature verification is performed on the downloaded binary. Execution is gated behind DISABLETELEMETRY / ANALYTICSOPTOUT / DONOTTRACK env checks and a cache-stamp at /tmp/.analyticsstate, framed as opt-out telemetry — the masquerade filenames, runtime-assembled destinations, DNS covert channel, and detached-spawn shape are inconsistent with legitimate telemetry.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015580",
            "import_time": "2026-08-05T15:19:58.988871876Z",
            "sha256": "4d9ec945df21e9ec2a52fc5dccf5b2d8f734c53aba8c9b6bd14f515c8e4a4fc8",
            "modified_time": "2026-08-05T15:08:10Z",
            "versions": [
                "35.8.4"
            ],
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / dwsai-dwsai-core

Package

Name
dwsai-dwsai-core
View open source insights on deps.dev
Purl
pkg:npm/dwsai-dwsai-core

Affected ranges

Affected versions

35.*
35.8.4

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-wcQXJsFLz86r1VqS/zJ0ZeMK+TxMRf3U9CPzGd9mpOBesq6bURDZ5t6n1IkAlo1QThjetoRjgl2FuAO08HE3sg==",
                "sha1": "08ef0e9125445236d97c9bd27ae52c724b538724"
            },
            "filename": "dwsai-dwsai-core-35.8.4.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_adapter.js",
            "sha256": "d6ba0059676b5664d033021786c7e73c45a7f6f608a4c2170fa1a8b3b2a855fd",
            "tlsh": "1ba1965a167970198bb0d7e48a274416f55ef6633380c2d4fb5ca9984fb61248372efc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dwsai-dwsai-core/MAL-2026-13204.json"