MAL-2026-12838

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-tcrm-identity-auth/MAL-2026-12838.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12838
Aliases
  • GHSA-3j5m-2g9v-9gjf
Published
2026-08-05T15:02:30Z
Modified
2026-08-06T01:19:57.820910055Z
Summary
Malicious code in bigops-tcrm-identity-auth (npm)
Details

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

Source: amazon-inspector (183fa24523e19286718ff854ed8d080c8d8635d6d914a3fbb871c388660fc479)

bigops-tcrm-identity-auth@35.9.3 is a dropper disguised as a session-management utility. Its main entry (index.js) requires bootstrap.js on load, which selects a platform-specific binary URL, fetches it over HTTPS from Cloudflare Workers hosts whose names are assembled at runtime by array-join to evade static analysis (e.g. oob-worker.cf99-9b3.workers.dev, cf100-416.workers.dev, cf102-baf.workers.dev), with a DNS-TXT fallback channel resolving sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The downloaded payload is written to /tmp or %TEMP% under a misleading name (.cache<hex> on Unix, dotnetdiag<hex>.exe on Windows), chmod 0755'd, and spawned detached via /bin/sh -c or cmd /c start. Cover-story comments (Session dedup, analyticsstate), env-var kill switches (DISABLETELEMETRY, DONOTTRACK), and a filesystem stamp file (.analytics_state) gate re-execution. Installing or requiring this package causes arbitrary attacker-controlled native code to run on the installer's host.

Source: ghsa-malware (ad2e715c7bea0d4bebc553adb912f79da26a2f1b6180929fe9fc21c6fbe482d2)

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": [
        {
            "sha256": "183fa24523e19286718ff854ed8d080c8d8635d6d914a3fbb871c388660fc479",
            "versions": [
                "35.9.3"
            ],
            "modified_time": "2026-08-05T15:02:30Z",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-015544",
            "import_time": "2026-08-05T15:19:57.196100824Z"
        },
        {
            "sha256": "ad2e715c7bea0d4bebc553adb912f79da26a2f1b6180929fe9fc21c6fbe482d2",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "source": "ghsa-malware",
            "import_time": "2026-08-06T00:58:53.269386689Z",
            "id": "GHSA-3j5m-2g9v-9gjf",
            "modified_time": "2026-08-05T18:40:08Z"
        }
    ]
}
References
Credits

Affected packages

npm / bigops-tcrm-identity-auth

Package

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

Affected ranges

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

Affected versions

35.*
35.9.3

Database specific

indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-Q3hxOXfB+49abfYr0eRSQ4wjBny5U9GgyZ71ZvYPddMpl2xHD5GdrpgyYaNnv5e+LtN/z97xt6LjHUapQDiI+A==",
                "sha1": "26294b87f41a48552d7274a8257a89e5ec297d45"
            },
            "filename": "bigops-tcrm-identity-auth-35.9.3.tgz"
        }
    ],
    "evidence_files": [
        {
            "sha256": "1dc56e488ff8214ae1719bcaf75c198fc13a1636c79e4024cb0a64db5500255d",
            "path": "_bootstrap.js",
            "tlsh": "55a1b95a06a6b0198fb0d7e0c71b9826f65af663378181c4f79c95984f7252483b3dfc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-tcrm-identity-auth/MAL-2026-12838.json"
cwes 
[
    {
        "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",
        "cweId": "CWE-506"
    }
]