MAL-2026-12373

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/eventea-diag/MAL-2026-12373.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12373
Aliases
  • GHSA-c86h-3ch7-5r5g
Published
2026-08-05T12:47:22Z
Modified
2026-08-06T01:21:02.082594198Z
Summary
Malicious code in eventea-diag (npm)
Details

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

Source: amazon-inspector (9941ff32c3b2d52ea7b7cccd4af391bfe359cf3766c4f22c484d1a51e178ab6c)

On require of the package, index.js loads shim.js which downloads a platform-specific binary from hardcoded Cloudflare Workers subdomains (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS-TXT base64 fallback to dl.well1.site, writes the bytes to a hidden temp file, chmods 755, and spawns it detached via /bin/sh -c or cmd. Host strings and dangerous APIs are assembled from split fragments at runtime (e.g. ["oob-worker.cf102-baf",".w","or","ke","rs",".d","ev"].join(""), require("child"+"process"), fs["chmod"+"Sync"]) to hide the destinations and primitives from static analysis. Cover-story naming (analyticsstate, dotnetdiag_*.exe,.cache_*) does not match the package's stated pub/sub adapter purpose. A second dropper implementation with the same pattern is bundled as lib/telemetry.js (81KB) framed as an 'Analytics SDK'. There is no pinning, no signature verification, and the delivery hosts are anonymous Cloudflare Workers subdomains unrelated to any declared publisher.

Source: ghsa-malware (f50f3b0e728e475ae1632ffe36294b2f132bd392b3f8878fe8b7f1a5627ccd08)

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": [
        {
            "import_time": "2026-08-05T13:08:44.570312353Z",
            "modified_time": "2026-08-05T12:47:22Z",
            "sha256": "9941ff32c3b2d52ea7b7cccd4af391bfe359cf3766c4f22c484d1a51e178ab6c",
            "id": "IN-MAL-2026-014762",
            "versions": [
                "20.5.3"
            ],
            "source": "amazon-inspector"
        },
        {
            "import_time": "2026-08-06T00:58:53.349247043Z",
            "sha256": "f50f3b0e728e475ae1632ffe36294b2f132bd392b3f8878fe8b7f1a5627ccd08",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "id": "GHSA-c86h-3ch7-5r5g",
            "modified_time": "2026-08-05T19:07:04Z",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / eventea-diag

Package

Name
eventea-diag
View open source insights on deps.dev
Purl
pkg:npm/eventea-diag

Affected ranges

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

Affected versions

20.*
20.5.3

Database specific

cwes 
[
    {
        "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",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-/fCUdtQF8u4jM8as3wnd2HsXd8A0tnv3vZLu3xLvD/Vu0j9cFWVVIa8FT2vczIVSC1wOlMTJTDav1BcR0VN4dA==",
                "sha1": "006e97bdd7d37692e904bcdd609bb1eb04f67d3b"
            },
            "filename": "eventea-diag-20.5.3.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_shim.js",
            "sha256": "2b67a028248b2d1731101188da0540dc24709b402d304f4bc1f2baebd4cd5e1e",
            "tlsh": "13a1959a16a5701d8bb0e7e487175415f69be6a33780c1d4fb9ca9884f72124c3b2efc"
        },
        {
            "path": "lib/telemetry.js",
            "sha256": "e65904d4dbb990af8e10c99f1b940027efb9b4ddcea2ed983831aa14a5d962d9",
            "tlsh": "68835056566a142186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/eventea-diag/MAL-2026-12373.json"