MAL-2026-13539

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/delivery-ci-codeceptjs/MAL-2026-13539.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13539
Published
2026-08-07T12:36:30Z
Modified
2026-08-07T13:20:21.556172799Z
Summary
Malicious code in delivery-ci-codeceptjs (npm)
Details

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

Source: amazon-inspector (0287654a4d9fa3f7e6f9a35c8bf06a8bb4f18fbbc3a5b3df3450a6c681897b49)

On require of the package's main entry, _helpers.js runs a setup() routine that selects a platform-specific payload path via a _DL_MAP table and downloads an opaque native binary from Cloudflare Workers subdomains whose hostnames are assembled by joining split string fragments (e.g. ["oob-worker.cf103-070.wo","rke","rs",".dev"].join("")), with a DNS-TXT chunked fallback that reassembles a base64 payload from numbered TXT records under *.wel1.ru subdomains (sdk./ext./pkg./net.dl.wel1.ru). The downloaded bytes are written to /var/tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmod 0755, and spawned detached via spawn("/bin/sh", ["-c", fp + " &"], {detached:true}) or cmd /c start /b. The package advertises a trivial no-op class and ships no native source consistent with the download; the hostnames are unrelated to the declared purpose, there is no version pinning or hash/signature verification, and the destination assembly and DNS-TXT fallback are structured to evade static string scanners. The staging paths use hidden dotfile / diagnostic-lookalike names to blend with normal temp-file activity.

Database specific 
{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-08-07T12:36:30Z",
            "id": "IN-MAL-2026-017049",
            "import_time": "2026-08-07T12:51:23.848009151Z",
            "versions": [
                "35.1.7"
            ],
            "source": "amazon-inspector",
            "sha256": "0287654a4d9fa3f7e6f9a35c8bf06a8bb4f18fbbc3a5b3df3450a6c681897b49"
        }
    ]
}
References
Credits

Affected packages

npm / delivery-ci-codeceptjs

Package

Name
delivery-ci-codeceptjs
View open source insights on deps.dev
Purl
pkg:npm/delivery-ci-codeceptjs

Affected ranges

Affected versions

35.*
35.1.7

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
indicators 
{
    "package_integrity": [
        {
            "filename": "delivery-ci-codeceptjs-35.1.7.tgz",
            "hashes": {
                "sha512_sri": "sha512-Os81++hgUjYHJbjgpEvOngw+LzJwCmYkVdo9XrLYfF7RmlH9tUfL0CJPUpWu0OQnPI1GoNUwmNu6FNViQyqncA==",
                "sha1": "46df18995fa815219e485ff1e185042d84971d1e"
            }
        }
    ],
    "evidence_files": [
        {
            "path": "_helpers.js",
            "tlsh": "05a1765a156670198bb0dbf48b175419f65af6a33380c288fb5c65981f7316483f2efc",
            "sha256": "2a814a73babd01cf799f66265009c12297c248b4e5d7121b4e2abe7b598f09a6"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/delivery-ci-codeceptjs/MAL-2026-13539.json"