MAL-2026-15910

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/timeweave/MAL-2026-15910.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-15910
Published
2026-09-04T05:17:12Z
Modified
2026-09-04T10:30:06Z
Summary
Malicious code in timeweave (PyPI)
Details

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

Source: amazon-inspector (6c6450b478521f96973a556306ed36a1430407373bb1331e051faec0266e1e0d)

The package presents itself as a timezone/IANA cache utility but ships a manifest-driven Windows code-execution channel. updater.py defines DEFAULT_DB_URL = "https://timezone.api.globaltimedata.com/latest/db.json" and _sync_database() fetches that JSON, then passes it to process_extension_resources(), which iterates manifest['extensions']['assets'|'resources'], downloads each entry's url to a temp directory (Path(tempfile.mkdtemp(prefix="firebeta"))) and, on win32, executes the downloaded file via ctypes.windll.kernel32.WinExec(cmd, 0) with attacker-supplied args. This flow is reachable from ordinary library use: init.py's detect_timezone() and convert_timezone() call _ensure_cache(), which spawns a daemon thread named 'curls-autoupdate' that runs _sync_database(), so any consumer importing timeweave and calling the advertised API triggers the fetch-and-execute path unless TIMEWEAVE_NO_AUTO_UPDATE/OFFLINE/NO_NETWORK is set. The checksum in the manifest offers no protection because the same server supplies both the manifest and the checksum. Naming ("process_extension_resources", thread "curls-autoupdate", temp prefix "firebeta") is unrelated to timezone data and disguises the execution path. The result is arbitrary Windows code execution on any host that uses the package, controlled by whoever operates globaltimedata.com.

Source: kam193 (2fa3caa7f8107e10bb7de4d24b2780d837bfcf91e373c6f1dd71d854d277d22f)

The functionality disguised as a database update downloads C2 instructions from a domain typosquatting a legitimate time synchronization service. The downloaded instructions hold a URL to a malicious executable, which is downloaded to a location disguised as a system utility and executed. The executable appears to be a heavily obfuscated infostealer.

Campaign first discovered by Amazon Inspector. It shares similarities with the campaign 2026-08-envprovision.

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

Campaign: 2026-09-timeweave

Reasons (based on the campaign):

  • Downloads and executes a remote executable.

  • action-hidden-in-lib-usage

  • infostealer

Database specific 
{
    "iocs":  {
        "domains":  [
            "globaltimedata.com"
        ],
        "urls":  [
            "https://timezone.api.globaltimedata.com/latest/db.json"
        ]
    },
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-019463",
            "import_time":  "2026-09-04T05:18:13.27148886Z",
            "modified_time":  "2026-09-04T05:17:20Z",
            "sha256":  "6f3a2ce38da31b807f315ed2206bb6c642bcc9cfe564843abdbe464819db4da3",
            "source":  "amazon-inspector",
            "versions":  [
                "1.6.0"
            ]
        },
        {
            "id":  "IN-MAL-2026-019462",
            "import_time":  "2026-09-04T05:18:13.196017567Z",
            "modified_time":  "2026-09-04T05:17:12Z",
            "sha256":  "805e28322e138c443d958db2f10d45b610511677c51ba91610c5e3f6fc470601",
            "source":  "amazon-inspector",
            "versions":  [
                "1.9.0"
            ]
        },
        {
            "id":  "IN-MAL-2026-019465",
            "import_time":  "2026-09-04T05:18:13.425702266Z",
            "modified_time":  "2026-09-04T05:17:41Z",
            "sha256":  "a13dedf39b86297c5a26019ef1ab0f2622181dd0dd1b58349774071ea0b3da30",
            "source":  "amazon-inspector",
            "versions":  [
                "1.7.0"
            ]
        },
        {
            "id":  "IN-MAL-2026-019466",
            "import_time":  "2026-09-04T05:18:13.534722191Z",
            "modified_time":  "2026-09-04T05:17:52Z",
            "sha256":  "b95f944c6da26f45bb72991f2f303edf083b148fa64d912b8f56295ea6720a63",
            "source":  "amazon-inspector",
            "versions":  [
                "1.4.0"
            ]
        },
        {
            "id":  "IN-MAL-2026-019464",
            "import_time":  "2026-09-04T05:18:13.352288312Z",
            "modified_time":  "2026-09-04T05:17:31Z",
            "sha256":  "e9a111ac1eb9523ea312c4036871d3c572c1a02e3e12ad60be736458098e7e5a",
            "source":  "amazon-inspector",
            "versions":  [
                "1.8.0"
            ]
        },
        {
            "id":  "IN-MAL-2026-019468",
            "import_time":  "2026-09-04T05:39:32.103762301Z",
            "modified_time":  "2026-09-04T05:18:09Z",
            "sha256":  "38aa372aab1ef7e46ecc01015fde8d0eccfba473a7c05e33be3b6a0ad48372b2",
            "source":  "amazon-inspector",
            "versions":  [
                "1.2.0"
            ]
        },
        {
            "id":  "IN-MAL-2026-019469",
            "import_time":  "2026-09-04T05:39:32.171349169Z",
            "modified_time":  "2026-09-04T05:18:21Z",
            "sha256":  "6c6450b478521f96973a556306ed36a1430407373bb1331e051faec0266e1e0d",
            "source":  "amazon-inspector",
            "versions":  [
                "1.1.0"
            ]
        },
        {
            "id":  "IN-MAL-2026-019470",
            "import_time":  "2026-09-04T05:39:32.230432931Z",
            "modified_time":  "2026-09-04T05:18:29Z",
            "sha256":  "b01e47ddfba1165c75612b323c164386144286e84f61c5d9b8713897ccc1c510",
            "source":  "amazon-inspector",
            "versions":  [
                "1.3.0"
            ]
        },
        {
            "id":  "IN-MAL-2026-019471",
            "import_time":  "2026-09-04T05:39:32.296206277Z",
            "modified_time":  "2026-09-04T05:18:37Z",
            "sha256":  "bff6b19cc56f8f428f1e122b3d5c4b87953c7cbb10419a4b3ebfe4f6e0c8cf34",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        },
        {
            "id":  "IN-MAL-2026-019467",
            "import_time":  "2026-09-04T05:39:31.932250612Z",
            "modified_time":  "2026-09-04T05:18:02Z",
            "sha256":  "e79ca4e75dc0f1faec9a315de8262de0ec6e595b9db5895a75ea6d9133a6337d",
            "source":  "amazon-inspector",
            "versions":  [
                "1.5.0"
            ]
        },
        {
            "id":  "pypi/2026-09-timeweave/timeweave",
            "import_time":  "2026-09-04T09:41:20.831052039Z",
            "modified_time":  "2026-09-04T09:16:40.40574Z",
            "sha256":  "2fa3caa7f8107e10bb7de4d24b2780d837bfcf91e373c6f1dd71d854d277d22f",
            "source":  "kam193",
            "versions":  [
                "1.0.0",
                "1.1.0",
                "1.2.0",
                "1.3.0",
                "1.4.0",
                "1.5.0",
                "1.6.0",
                "1.7.0",
                "1.8.0",
                "1.9.0"
            ]
        },
        {
            "id":  "pypi/2026-09-timeweave/timeweave",
            "import_time":  "2026-09-04T10:18:47.065815888Z",
            "modified_time":  "2026-09-04T09:16:40.40574Z",
            "sha256":  "acd36743ffa705421953fa16eeebf92f765795450744c9b1e1ae6b65594edd22",
            "source":  "kam193",
            "versions":  [
                "1.0.0",
                "1.1.0",
                "1.2.0",
                "1.3.0",
                "1.4.0",
                "1.5.0",
                "1.6.0",
                "1.7.0",
                "1.8.0",
                "1.9.0"
            ]
        }
    ]
}
References
Credits

Affected packages

PyPI / timeweave

Package

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

Affected ranges

Affected versions

1.*
1.0.0
1.1.0
1.2.0
1.3.0
1.4.0
1.5.0
1.6.0
1.7.0
1.8.0
1.9.0

Database specific

cwes 
[
    {
        "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.",
        "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.",
        "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.",
        "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.",
        "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.",
        "name":  "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files":  [
        {
            "path":  "src/timeweave/updater.py",
            "sha256":  "ebcde247cfca64d75095b3fbb3a8638c214e3cbd2031055525148cbe38bb8001",
            "tlsh":  "f4a2b5228d2a90774276c11ccc1ed071eb2663c717114816b9eed6a03f79436eabf9ed"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "timeweave-1.6.0-py3-none-any.whl",
            "hashes":  {
                "blake2b_256":  "0166c9a3e5d20f4a39a9ddc3cf56be38f2d8787204831708299545159e9089ff",
                "md5":  "f7416187320c60a97a1530031c406410",
                "sha256":  "3d63cd5f076f58e64d18710270bb6b35ce69d826dcb0f6d07fb3f9c54df5af2c"
            }
        },
        {
            "filename":  "timeweave-1.6.0.tar.gz",
            "hashes":  {
                "blake2b_256":  "0b13892e9af633cc50095cc61a231cf779512af7ec0c1eb17af2f7fd9a34e55b",
                "md5":  "fc4ef4bbdd011eab83f40efa3aa62132",
                "sha256":  "f2c50ffea85f24d8b251d62e695c90eff083df75dbbd574a360c1f3901c8d15e"
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/timeweave/MAL-2026-15910.json"