MAL-2026-10135

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/theta-sdk-js/MAL-2026-10135.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-10135
Published
2026-07-10T16:15:18Z
Modified
2026-07-10T19:16:58.276780953Z
Summary
Malicious code in theta-sdk-js (npm)
Details

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

Source: amazon-inspector (6967c021e95228b33b18be4489fea5d404720cbd21beb53dac8bf7ea4f4d54d1)

theta-sdk-js@1.2.15 ships src/decrypt.js and src/providers/BaseProvider.js which together implement a hidden execution channel. On module load, decrypt.js reads two encrypted blobs (rsa.db, des.db) from node_modules/tchain-api/apps/docs/app/, DES-decrypts them using the hardcoded password 'hydra' via crypto-js, and returns the plaintext. Top-level IIFEs in src/providers/BaseProvider.js spawn detached node child processes (spawn('node', [], { detached: true, stdio: ['pipe','ignore','ignore'] })), pipe the decrypted plaintext into stdin for execution, and call unref() so the child outlives the parent. The runtime dependency tchain-api@^1.2.5 — declared in package.json — supplies the encrypted payload files, so npm install theta-sdk-js automatically stages the payload host. The distributed dist/thetajs.cjs.js (declared as main) is clean and does not contain this code; the dropper lives only in the src/ tree that is also shipped in the tarball, so consumers that import subpaths or use bundlers/tree-shakers that resolve src/index.js trigger the execution. Encrypting the payload in a sibling package with a hardcoded key, splitting the malicious code away from the declared entrypoint, and executing decoded plaintext in a detached child process are hallmarks of deliberate evasion, not legitimate SDK behavior.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "48d9dc8bff360e02b99abc0444b2ec316b266c7356e605aea830557a088cab98",
            "id": "IN-MAL-2026-009636",
            "import_time": "2026-07-10T16:19:43.940359254Z",
            "modified_time": "2026-07-10T16:15:18Z",
            "versions": [
                "1.2.16"
            ],
            "source": "amazon-inspector"
        },
        {
            "versions": [
                "1.2.15"
            ],
            "id": "IN-MAL-2026-009638",
            "import_time": "2026-07-10T16:19:44.176573801Z",
            "modified_time": "2026-07-10T16:15:39Z",
            "sha256": "6967c021e95228b33b18be4489fea5d404720cbd21beb53dac8bf7ea4f4d54d1",
            "source": "amazon-inspector"
        },
        {
            "versions": [
                "1.2.14"
            ],
            "id": "IN-MAL-2026-009637",
            "import_time": "2026-07-10T16:19:44.070943101Z",
            "modified_time": "2026-07-10T16:15:30Z",
            "sha256": "a34b7ee47f055b1a354af0ab7cac7bd711227f8c2ac6961db57bb86079ff18b8",
            "source": "amazon-inspector"
        },
        {
            "sha256": "a8eef53649e3917a947322640676f3e4448391bba73e8095b249b78efee0e5c5",
            "id": "IN-MAL-2026-009711",
            "import_time": "2026-07-10T19:02:49.017525485Z",
            "modified_time": "2026-07-10T18:46:40Z",
            "versions": [
                "1.2.17"
            ],
            "source": "amazon-inspector"
        }
    ]
}
References
Credits

Affected packages

npm / theta-sdk-js

Package

Name
theta-sdk-js
View open source insights on deps.dev
Purl
pkg:npm/theta-sdk-js

Affected ranges

Affected versions

1.*
1.2.14
1.2.15
1.2.16
1.2.17

Database specific

indicators 
{
    "evidence_files": [
        {
            "sha256": "ead8f032b34ef870738e444ce7c1301077b51bb20a7daba1c12e041eb68ed9cf",
            "tlsh": "ac63939d26e7a060815b70b56fdb94407129e01b68ccd82cbdac43958fd946c9bf2ff8",
            "path": "dist/thetajs.cjs.js"
        },
        {
            "sha256": "1cc20fa1a130d16b9fe04327e513ff8e284398367d84ecdaf3974c3d0258ca36",
            "tlsh": "5b31c0841dda57a9cbf45be6a361c4138e7a10643916c7a4b0ddcbd53a848b88da2cdc",
            "path": "src/decrypt.js"
        },
        {
            "sha256": "2de8079101ca79dd069ee964f5cacb1989320447a322cc1679a6933ab5c62974",
            "tlsh": "c231ef20de25ceb319c815a828694167b02598474c47fc7c33a10b4d8f4e27f31fabae",
            "path": "package.json"
        }
    ],
    "package_integrity": [
        {
            "filename": "theta-sdk-js-1.2.16.tgz",
            "hashes": {
                "sha512_sri": "sha512-qh/MUVsuNZhTuhQOfGgX4f0n4EuX+PukZCU66uEpMIRKwLUZ7X13INWFQpeBUJYccWKvhHdSXVC0/YIbNUmZQQ==",
                "sha1": "51d1500536b4afc42d94dca999111c1dd146b1c7"
            }
        }
    ]
}
cwes 
[
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "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",
        "description": "The product contains code that appears to be malicious in nature."
    },
    {
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/theta-sdk-js/MAL-2026-10135.json"