MAL-2026-13276

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dippy-invertor/MAL-2026-13276.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13276
Published
2026-08-05T15:28:59Z
Modified
2026-08-05T16:50:30.052115343Z
Summary
Malicious code in dippy-invertor (npm)
Details

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

Source: amazon-inspector (e8dbed78de451c63784d37e7ae925bc4bf1288b7c4cf6e0e6fb0e7f9ff4cd451)

On require('dippy-invertor'), index.js unconditionally loads _ext.js, which downloads an OS-specific executable from four hardcoded Cloudflare Workers hosts (oob-worker.cf10*.workers.dev family) and, on HTTPS failure, falls back to a DNS-TXT covert channel against sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru (queries TXT at c.<domain> for a chunk count, iterates 0.<domain>..N.<domain>, base64-decodes the concatenation). The retrieved payload is written to /tmp or %TEMP% under a disguised name (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmod 0755, and spawned detached and unref'd via /bin/sh -c or cmd. Hostnames and the child_process / chmodSync API names are split-concatenated ([...].join('')) to evade string scanning, and cover-story identifiers (analytics_state, DISABLE_TELEMETRY, dotnet_diag_*.exe) disguise the loader. The package has no legitimate advertised behavior that requires fetching and executing an opaque remote binary at load time.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-05T15:28:59Z",
            "source": "amazon-inspector",
            "sha256": "e8dbed78de451c63784d37e7ae925bc4bf1288b7c4cf6e0e6fb0e7f9ff4cd451",
            "import_time": "2026-08-05T16:13:35.457295949Z",
            "id": "IN-MAL-2026-015715",
            "versions": [
                "35.1.6"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / dippy-invertor

Package

Name
dippy-invertor
View open source insights on deps.dev
Purl
pkg:npm/dippy-invertor

Affected ranges

Affected versions

35.*
35.1.6

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "dippy-invertor-35.1.6.tgz",
            "hashes": {
                "sha512_sri": "sha512-nSPwIClydTooVf+WqS+xKeb7HurDx3yRvWDKQ4eDPH/BIdVZUQnZJIbEeL+8BIt4HfaAKF/a9oe8NNMz1DK7UQ==",
                "sha1": "879317e7c4dbae06cd5297939668b2fd6190e7f1"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "6aa19756166630198bb0abe487174416f75bf6633780c298f75c68885fb3528c3b2efc",
            "sha256": "df6946bdfccf1206fd39b09e49726d42209d844e66c6c9e1a14358a21fe5dc6b",
            "path": "_ext.js"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dippy-invertor/MAL-2026-13276.json"
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]