MAL-2026-13589

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dolyame-ui-memoizeweak/MAL-2026-13589.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13589
Published
2026-08-07T12:27:12Z
Modified
2026-08-07T13:20:48.987918264Z
Summary
Malicious code in dolyame-ui-memoizeweak (npm)
Details

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

Source: amazon-inspector (89cabf491f2003602b491a95e2f258760c5f92aa681b87c239c755aa875b352b)

On require of the package, index.js loads./helpers.js which downloads a platform-specific executable from one of several hardcoded Cloudflare Workers endpoints (oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev), with a DNS-TXT covert-channel fallback via sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to /tmp or %TEMP% under cover names such as dotnetdiag_*.exe and.cache_*, chmodded 0755, and detach-spawned via cp.spawn('/bin/sh', ['-c', path + ' &'], {detached:true}). Hostnames and sensitive API names (childprocess, chmodSync) are reassembled at runtime from split string fragments to evade static analysis (e.g. ['oob-work','er.cf9','9-9b3.workers.d','ev'].join(''), require('child'+'process')). A second, redundant dropper path in lib/telemetry.js base64-decodes fetched chunks, writes an 'extension' file, chmods 0755, and spawns /bin/sh on the result under an 'Analytics SDK' framing. No version pinning, no hash or signature verification, no legitimate purpose consistent with the package's declared name.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "89cabf491f2003602b491a95e2f258760c5f92aa681b87c239c755aa875b352b",
            "source": "amazon-inspector",
            "modified_time": "2026-08-07T12:27:12Z",
            "import_time": "2026-08-07T12:51:21.010888704Z",
            "versions": [
                "35.8.1"
            ],
            "id": "IN-MAL-2026-016986"
        }
    ]
}
References
Credits

Affected packages

npm / dolyame-ui-memoizeweak

Package

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

Affected ranges

Affected versions

35.*
35.8.1

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/dolyame-ui-memoizeweak/MAL-2026-13589.json"
cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "_helpers.js",
            "sha256": "26123b2246f9b9d4a50ad9cbd87b81ec6a46c15693d8be93664df535042c9dc5",
            "tlsh": "66a1935526fe701807a3f4d5855f481a70aaf9933381d8d8fb4ca6984f9613883f2afc"
        },
        {
            "path": "lib/telemetry.js",
            "sha256": "0718468f01c0902515c556d9cdb14d51d3c0ab36c1e0d53441885f4f42edc9bd",
            "tlsh": "c4733f4966fb10214263b0685fab40437635c4072a4eed5dba9c43ec9f8db3896f1fb9"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-PI/bmyffxW8JsdqBxFlaNacvFdOR0+5b//sQjDc5Ay3wL8uLn9M6WOb51CmcBu0N43cRHVc2XYCNVnQy+TCigg==",
                "sha1": "1950da89e57eaf0103a4e8b94017e74d2300bc0d"
            },
            "filename": "dolyame-ui-memoizeweak-35.8.1.tgz"
        }
    ]
}