MAL-2026-12242

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-fb-rf-add-application/MAL-2026-12242.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12242
Aliases
  • GHSA-pvc7-jp4m-6758
Published
2026-08-05T09:00:35Z
Modified
2026-08-26T01:18:20Z
Summary
Malicious code in tinkoff-fb-rf-add-application (npm)
Details

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

Source: amazon-inspector (788686e9aacdc59ec40f42563a7d9ba5020c75d6c724c8bf59623213b51df780)

The package's main entry loads bootstrap.js on require(), which downloads a platform-specific executable from string-fragment-obfuscated Cloudflare-workers mirrors (assembled at runtime via array-join, e.g. oob-worker.cf*.workers.dev) with a DNS-TXT chunked base64 fallback under *.dl.well1.site (tin/tina/ldr/win subdomains). The fetched bytes are written to /tmp or %TEMP% under a disguised filename impersonating system binaries (dotnet_diag.exe on Windows,.cache_ on Unix), chmod 0755, and spawned detached via /bin/sh -c or cmd.exe /c start /b. A lock file.analytics_state and telemetry-shaped env-var opt-outs provide a cover story. The C2 hostnames are constructed from split string fragments to evade static analysis.

Source: ghsa-malware (dded5cf8e0ac224ea75063c3dffc5faf0241f5648de3957efce29d011edc5735)

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-2026-014506",
            "import_time": "2026-08-05T09:28:19.92624529Z",
            "modified_time": "2026-08-05T09:00:35Z",
            "sha256": "788686e9aacdc59ec40f42563a7d9ba5020c75d6c724c8bf59623213b51df780",
            "source": "amazon-inspector",
            "versions": [
                "20.3.5"
            ]
        },
        {
            "id": "GHSA-pvc7-jp4m-6758",
            "import_time": "2026-08-25T16:26:05.050888937Z",
            "modified_time": "2026-08-25T15:52:59Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "dded5cf8e0ac224ea75063c3dffc5faf0241f5648de3957efce29d011edc5735",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / tinkoff-fb-rf-add-application

Package

Name
tinkoff-fb-rf-add-application
View open source insights on deps.dev
Purl
pkg:npm/tinkoff-fb-rf-add-application

Affected ranges

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

Affected versions

20.*
20.3.5

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": "_bootstrap.js",
            "sha256": "fa2c38347cd5f93c269af5371d197248a40fa48caec63e5fe98fcfc712b3cb4b",
            "tlsh": "29a1966e156630294bb09be48717481afa5af6537380c294fb5ca5945f72224c3b1efc"
        }
    ],
    "package_integrity": [
        {
            "filename": "tinkoff-fb-rf-add-application-20.3.5.tgz",
            "hashes": {
                "sha1": "ddc8f3b353fec5b1d92c75e42acd130a587384a3",
                "sha512_sri": "sha512-JE2L3YlWbL4fasvq18+sAlyyUBKtlvi2+2GoGtrlgV4p4ndZ0OoJZps7e/nklP4ay++vh7KAWQBaURyufWp4Qw=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-fb-rf-add-application/MAL-2026-12242.json"