MAL-2026-12844

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-timeline/MAL-2026-12844.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12844
Aliases
  • GHSA-4v4p-9667-cjpw
Published
2026-08-05T15:02:19Z
Modified
2026-08-26T01:18:20Z
Summary
Malicious code in bigops-timeline (npm)
Details

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

Source: amazon-inspector (d39f8f76c66cd667590e9159602b8c4ce9172a84fdf859f0b11fb862efb068b2)

On require('bigops-timeline'), index.js loads helpers.js which runs immediately: it selects a platform-specific payload path, downloads a binary from a rotating list of Cloudflare Workers mirrors (oob-worker.cf99-9b3.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev), with a DNS TXT chunked base64 fallback under sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru, writes the fetched bytes to /var/tmp or %TEMP% under disguised names (e.g., dotnet_diag.exe,.cache_), chmods 0755, and spawns the file detached via /bin/sh -c or cmd.exe start /b. Destination hosts are assembled from split string fragments (e.g., ['oob-worker.cf99-9b3.workers.de','v'].join('')) to defeat static scanners, and no hash or signature verification is performed on the downloaded payload. The purpose-agnostic name and the anonymous, rotating, obfuscated infrastructure identify this as a dropper rather than a legitimate native-binary loader.

Source: ghsa-malware (aaf70b317c204b0469ea22034693c7cd1a3cdbe79725ec5697dccb3f0960363e)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015543",
            "import_time": "2026-08-05T15:19:57.141056229Z",
            "modified_time": "2026-08-05T15:02:19Z",
            "sha256": "d39f8f76c66cd667590e9159602b8c4ce9172a84fdf859f0b11fb862efb068b2",
            "source": "amazon-inspector",
            "versions": [
                "35.4.9"
            ]
        },
        {
            "id": "GHSA-4v4p-9667-cjpw",
            "import_time": "2026-08-25T16:26:05.004149462Z",
            "modified_time": "2026-08-25T15:58:21Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "aaf70b317c204b0469ea22034693c7cd1a3cdbe79725ec5697dccb3f0960363e",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / bigops-timeline

Package

Name
bigops-timeline
View open source insights on deps.dev
Purl
pkg:npm/bigops-timeline

Affected ranges

Type
SEMVER
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

35.*
35.4.9

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    },
    {
        "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": "ff539ea7fea6889f4f3e601386a613c760dc3ea356562c9cd4da129fdb2252fd",
            "tlsh": "63a1869a1265701c4bb0a7e4c71b5415fa5af663338086d4f79ca5981fb352483b2efc"
        }
    ],
    "package_integrity": [
        {
            "filename": "bigops-timeline-35.4.9.tgz",
            "hashes": {
                "sha1": "22d21ea298d647939022d91dfcc65b13799f18b2",
                "sha512_sri": "sha512-FOpKpKU284D8YCbUY3W5i/HK6/uRAYELB6vMKcDGhwoGXMktzIjDanLGGmAqUTSeKpyFPHhamS+EeQ1byi0Uow=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-timeline/MAL-2026-12844.json"