MAL-2026-13559

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dolyame-ui-collapseblock/MAL-2026-13559.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13559
Published
2026-08-07T12:33:49Z
Modified
2026-08-07T13:20:32.832028955Z
Summary
Malicious code in dolyame-ui-collapseblock (npm)
Details

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

Source: amazon-inspector (ef9992e81f3de4cb9bd4391466d7850e953c19a0772ebbe5992953044466377c)

On require(), shim.js fetches an OS/architecture-specific native binary from hardcoded Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) whose hostnames are reconstructed at runtime via array-join to evade static inspection. The payload is written to /tmp or %TEMP% under a disguised name (.cache<rand> on Unix, dotnetdiag<rand>.exe on Windows), chmodded 0755, and spawned detached via /bin/sh -c or cmd. If HTTPS fetches fail, the loader falls back to a DNS-TXT covert channel under sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru, retrieving a chunk count from c.<domain> and reassembling a base64-encoded binary from sequentially-numbered subdomain TXT records. index.js requires _shim on load, so importing the package auto-executes the fetched attacker-controlled native binary with no version pinning, no hash or signature verification, and destinations unrelated to the package's stated purpose. A 21028-second cache stamp gates repeats and undocumented environment variables provide an operator opt-out, both consistent with hostile dropper tradecraft rather than legitimate functionality.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "ef9992e81f3de4cb9bd4391466d7850e953c19a0772ebbe5992953044466377c",
            "modified_time": "2026-08-07T12:33:49Z",
            "import_time": "2026-08-07T12:51:22.926554919Z",
            "versions": [
                "35.8.1"
            ],
            "id": "IN-MAL-2026-017031",
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / dolyame-ui-collapseblock

Package

Name
dolyame-ui-collapseblock
View open source insights on deps.dev
Purl
pkg:npm/dolyame-ui-collapseblock

Affected ranges

Affected versions

35.*
35.8.1

Database specific

indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha1": "0a8abfa47bbdc9e9bf6442549b3fbf16cba5a1e7",
                "sha512_sri": "sha512-AxhNpQ0OyuFNuGjdOTNUp11ihZGLsslQh0wUGEVafE+WL+BAfBkmwhVVnMcT6QpPBRUVl2s9zdOXrgL642fzGw=="
            },
            "filename": "dolyame-ui-collapseblock-35.8.1.tgz"
        }
    ],
    "evidence_files": [
        {
            "tlsh": "44a1845a26fb30180793e5d4851f8826719af65333c4d9c4fb8c6a984fe653883b29fc",
            "path": "_shim.js",
            "sha256": "0e8158e4aa76a286f520de3e54708eda541df671d703feee52a7893cf6d8a0b3"
        }
    ]
}
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/dolyame-ui-collapseblock/MAL-2026-13559.json"