MAL-2026-13712

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/bigtime/MAL-2026-13712.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13712
Published
2026-08-10T21:22:19Z
Modified
2026-08-11T12:30:11.247345761Z
Summary
Malicious code in bigtime (PyPI)
Details

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

Source: amazon-inspector (d14cc45326877547d5297956e4c2b5719122bcef140db0d7959e1b4da94e58d7)

The package presents itself as a time module wrapper, but its __init__.py invokes qwe900.init, which performs two exfiltration behaviors on import. First, _home_folders() enumerates the installer's Desktop, Downloads, and Documents directories and _find_all_files() walks them; a background thread tails file contents and POSTs them to a Discord webhook whose URL is stored base64-encoded in _WEBHOOK_B64 and decoded at import time. Second, init() replaces builtins.open process-wide with _patched_open, wrapping every returned file object in _WatchedFile; any subsequent write() on any file in the host process is copied to the same webhook. The embed title New Token Captured names the operator's intent to capture credentials and tokens flowing through the installer's own code. The base64-encoded destination and the time-wrapper cover story hide the exfiltration channel from casual source review.

Source: kam193 (79fef30b8024966d3842e702f5f277b66d64b6a4a6af603c9eac0c720a4448d6)

The package contains hidden code to overwrite the built-in "open" function and exfiltrate every write to opened files. Exfiltration watcher is also attached to other files in user's home directory.

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-08-bigtime

Reasons (based on the campaign):

  • files-exfiltration
Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "pypi/2026-08-bigtime/bigtime",
            "import_time": "2026-08-10T21:49:25.716824233Z",
            "sha256": "79fef30b8024966d3842e702f5f277b66d64b6a4a6af603c9eac0c720a4448d6",
            "versions": [
                "0.1.0"
            ],
            "source": "kam193",
            "modified_time": "2026-08-10T21:22:22.528955Z"
        },
        {
            "id": "IN-MAL-2026-017286",
            "import_time": "2026-08-11T12:23:04.679907005Z",
            "sha256": "d14cc45326877547d5297956e4c2b5719122bcef140db0d7959e1b4da94e58d7",
            "modified_time": "2026-08-11T11:58:16Z",
            "source": "amazon-inspector",
            "versions": [
                "0.1.0"
            ]
        }
    ]
}
References
Credits

Affected packages

PyPI / bigtime

Package

Name
bigtime
View open source insights on deps.dev
Purl
pkg:pypi/bigtime

Affected ranges

Affected versions

0.*
0.1.0

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "bigtime/qwe900.py",
            "tlsh": "99022063e9197851d387ca6a8813d852731f7d9b1d086038baeca2a82f4d47dc1f0ded",
            "sha256": "97e1d5bce04f251516aa600544c7be8df19eedb9b252d91ca4c41498b84a540a"
        }
    ],
    "package_integrity": [
        {
            "filename": "bigtime-0.1.0-py3-none-any.whl",
            "hashes": {
                "sha256": "ce1a78298e6693196fed4b2b06808414374b7b0b1e455d3f2e745c9128901aa1",
                "blake2b_256": "e51017ada741f8e2e4febbb6bea2111a8c12535cc1d11635658fba75aa801d5a",
                "md5": "41af2dc0a66bf2d59732d65605294231"
            }
        },
        {
            "filename": "bigtime-0.1.0.tar.gz",
            "hashes": {
                "sha256": "dd5566e914c1c4fdfebc1844c39cb936e9dd617a42b2a50750d08c506d82e50b",
                "blake2b_256": "8e0edddf47c642301ae256fea451b273bc8ffaf0518792927a285b29367a8311",
                "md5": "01396a059c30ed596444cd805b77a53c"
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/bigtime/MAL-2026-13712.json"