MAL-2026-12261

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-statist-browser-typed-client-investaccounting.events.templatepage.mainpage/MAL-2026-12261.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12261
Aliases
  • GHSA-48jc-v3r3-h4fr
Published
2026-08-05T08:59:33Z
Modified
2026-08-26T01:18:20Z
Summary
Malicious code in tinkoff-statist-browser-typed-client-investaccounting.events.templatepage.mainpage (npm)
Details

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

Source: amazon-inspector (01843210cccc7d6327d870fbe2f8d53a493aa8d1db525de7473f30f97ea9dcdb)

On require of the package, index.js loads bridge.js which assembles Cloudflare Workers hostnames by joining split string fragments (e.g. ['oob-worker.c','f103','-070.w','orkers.d','ev'].join('')) and downloads a platform-specific binary over HTTPS, with a DNS TXT fallback resolving to *.dl.well1.site (e.g. ['tin.dl.well1.','si','te'].join('')). The binary is written to /var/tmp/.cache on Linux or %TEMP%/dotnet_diag_.exe on Windows, chmod 0755, and spawned detached via /bin/sh -c or cmd.exe /c start at _bridge.js:120-126. Cover-story comments and env-var opt-outs (DISABLE_TELEMETRY, ANALYTICS_OPT_OUT, DO_NOT_TRACK) frame the drop-and-exec as telemetry; a lib/telemetry.js file (not reachable from main) contains an expanded variant of the same pattern. The package name mimics an internal Tinkoff-scoped namespace with a placeholder README ('Mainpage abstraction layer'), consistent with a dependency-confusion lure targeting Tinkoff internal build systems.

Source: ghsa-malware (6101e398bf5698cfdb82ad26e12f536141ee9b2eed4f80ddd9ccccee71242f2e)

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-2026-014499",
            "import_time": "2026-08-05T09:28:19.15293664Z",
            "modified_time": "2026-08-05T08:59:33Z",
            "sha256": "01843210cccc7d6327d870fbe2f8d53a493aa8d1db525de7473f30f97ea9dcdb",
            "source": "amazon-inspector",
            "versions": [
                "20.4.5"
            ]
        },
        {
            "id": "GHSA-48jc-v3r3-h4fr",
            "import_time": "2026-08-25T16:26:04.999792728Z",
            "modified_time": "2026-08-25T16:00:52Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "6101e398bf5698cfdb82ad26e12f536141ee9b2eed4f80ddd9ccccee71242f2e",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / tinkoff-statist-browser-typed-client-investaccounting.events.templatepage.mainpage

Package

Name
tinkoff-statist-browser-typed-client-investaccounting.events.templatepage.mainpage
View open source insights on deps.dev
Purl
pkg:npm/tinkoff-statist-browser-typed-client-investaccounting.events.templatepage.mainpage

Affected ranges

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

Affected versions

20.*
20.4.5

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": "_bridge.js",
            "sha256": "af564f7d98ed93c414bef812e6b6856edd79c5735970823b2131090c50658943",
            "tlsh": "9ca1a79b06a6701987f0dbe0cb175816f55be26333808295fb9ca5944f7712483b2efc"
        },
        {
            "path": "package.json",
            "sha256": "2da5fc89307361639fc2853e419cb6b3eecbae294f7153c829bdd265e5a9a4c9",
            "tlsh": "3dd095110322543308f54524ec276007f7f33f5f12385c063177151c44140f7016f324"
        }
    ],
    "package_integrity": [
        {
            "filename": "tinkoff-statist-browser-typed-client-investaccounting.events.templatepage.mainpage-20.4.5.tgz",
            "hashes": {
                "sha1": "4afc8d0678c727b8701e1d008e7d116f616064d3",
                "sha512_sri": "sha512-QRTgLlo8xz02iz3g5EspRjF4BdupnDO4ppkEDvPuQ4SV0y+QjgX28w2MlZQTlBQwlk+frTnFoda+N05IihwEIw=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-statist-browser-typed-client-investaccounting.events.templatepage.mainpage/MAL-2026-12261.json"