MAL-2026-12461

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/streak-daily-core/MAL-2026-12461.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12461
Aliases
  • GHSA-8vjj-vq79-pf8g
Published
2026-08-05T12:48:03Z
Modified
2026-08-26T01:12:50Z
Summary
Malicious code in streak-daily-core (npm)
Details

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

Source: amazon-inspector (ea29201e3cd49e11201222e430bd1787a1b00abdc46fad18908d0033459ed2d7)

streak-daily-core@1.0.0's main entry (index.mjs) runs a top-level async IIFE that reconstructs identifiers, paths, and URLs from char-code arrays to evade static analysis. When the runtime is Linux inside WSL and NODE_ENV is not 'production', it fetches https://f004.backblazeb2.com/file/dp8hbvocjd2fpza/helper.tar.gz over HTTPS, extracts it with tar -xzf into a cache directory, and spawns a second binary (/background-service) as a detached process. It then reaches from WSL into the Windows host filesystem at /mnt/c/Users//AppData/Roaming/Microsoft/Windows/Start Menu/Programs/Startup and writes an env-setup.cmd launcher that re-executes the dropped binary on every Windows logon, establishing persistence on the Windows host from the Linux side to bypass Windows-side scanning. Module names ('process','fs','https','child_process','spawn'), the WSL_DISTRO_NAME env-var name, the Backblaze URL, the tar arguments, the Startup-folder path, and the.cmd template are all stored as numeric arrays and reassembled via String.fromCharCode. Fetched content is not pinned, hashed, or signature-verified, and the destination is a mutable third-party file host unrelated to the declared package purpose.

Source: ghsa-malware (825bb6fac9dd7bc3e79aed7db9ab55b21b4b3b6646dd048756b344427dfbf6c0)

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-2026-014766",
            "import_time": "2026-08-05T13:08:44.857114332Z",
            "modified_time": "2026-08-05T12:48:03Z",
            "sha256": "ea29201e3cd49e11201222e430bd1787a1b00abdc46fad18908d0033459ed2d7",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        },
        {
            "id": "GHSA-8vjj-vq79-pf8g",
            "import_time": "2026-08-25T15:30:22.791713688Z",
            "modified_time": "2026-08-25T14:44:23Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "825bb6fac9dd7bc3e79aed7db9ab55b21b4b3b6646dd048756b344427dfbf6c0",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / streak-daily-core

Package

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

Affected ranges

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

Affected versions

1.*
1.0.0

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": "index.mjs",
            "sha256": "cfe3f32e50ae0fd429c59601071d52ed504c2cbab1b7da07d0ee42661f16aeb8",
            "tlsh": "50e16483f7ac27724fa082e8817cf547377cd0257cc2a590ecd8560da25b568f6a4778"
        }
    ],
    "package_integrity": [
        {
            "filename": "streak-daily-core-1.0.0.tgz",
            "hashes": {
                "sha1": "6b6535588e03956bf0fe524c149299f617ec347d",
                "sha512_sri": "sha512-ftUtVvwOmkm0s5iIF38IvSrmVFGy+LuwWy8QrUXMEi83LYdRtXe0Fut+qaFD6yFlZHvEM/3Q8cRhSUNkcUBySw=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/streak-daily-core/MAL-2026-12461.json"