MAL-2026-13490

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/fast-hashes/MAL-2026-13490.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13490
Published
2026-08-07T09:25:16Z
Modified
2026-08-07T12:35:24.781450078Z
Summary
Malicious code in fast-hashes (PyPI)
Details

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

Source: amazon-inspector (503b750458783954b66f8dea6ee8b0300fd7db5b225280f1af432cf78c1faf6d)

setup.py defines a custom install command (NativeInstall.run) that decodes a base64 blob and passes it to exec(compile(...)) at install time. The decoded payload downloads an opaque binary from https://github.com/totti2188/8gp1Q7iZD3h4VW/releases/download/v1.3A/something to /tmp/something, chmods it to 0755, and Popen-launches it detached with startnewsession=True. The fetch target's GitHub account (totti2188) is unrelated to the declared package publisher, the binary is unpinned and unverified, and the fetch-and-execute logic is concealed behind a base64 blob labeled COMPATPAYLOAD with a benign-sounding 'configurenative_bindings' cover story. The package's non-install code only wraps hashlib and has no legitimate need for a native binary. Any pip install of this version triggers arbitrary code execution on the installer's host under the identity of a third-party GitHub account.

Source: kam193 (658a96d4157086ae099c38b27ef8fb7d1664956a251f21d55a9d8cb208c0a8fc)

Package imitates name of a popula library. During installation, obfuscated code downloads a malicious executable and starts it. It then exfiltrates at least cryptocurrency wallet data, probably more.

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

Campaign: 2026-08-flasq

Reasons (based on the campaign):

  • typosquatting

  • The package overrides the install command in setup.py to execute malicious code during installation.

  • exfiltration-generic

  • Downloads and executes a remote executable.

  • obfuscation

  • exfiltration-crypto

Database specific 
{
    "iocs": {
        "urls": [
            "https://github.com/totti2188/8gp1Q7iZD3h4VW/releases/download/v1.3A/something"
        ],
        "ips": [
            "193.70.34.101"
        ]
    },
    "malicious-packages-origins": [
        {
            "sha256": "658a96d4157086ae099c38b27ef8fb7d1664956a251f21d55a9d8cb208c0a8fc",
            "source": "kam193",
            "import_time": "2026-08-07T09:28:06.533855428Z",
            "modified_time": "2026-08-07T09:25:16.339161Z",
            "versions": [
                "0.1.0"
            ],
            "id": "pypi/2026-08-flasq/fast-hashes"
        },
        {
            "sha256": "39a077e7478e5e60661ac52b41882f4f72d91acd6777a1828f2aa28d5ccfb2ba",
            "source": "kam193",
            "modified_time": "2026-08-07T09:36:39.060115Z",
            "versions": [
                "0.1.0"
            ],
            "import_time": "2026-08-07T10:23:52.431119868Z",
            "id": "pypi/2026-08-flasq/fast-hashes"
        },
        {
            "source": "amazon-inspector",
            "sha256": "503b750458783954b66f8dea6ee8b0300fd7db5b225280f1af432cf78c1faf6d",
            "versions": [
                "0.1.0"
            ],
            "import_time": "2026-08-07T12:23:26.79638423Z",
            "modified_time": "2026-08-07T12:16:15Z",
            "id": "IN-MAL-2026-016909"
        }
    ]
}
References
Credits

Affected packages

PyPI / fast-hashes

Package

Name
fast-hashes
View open source insights on deps.dev
Purl
pkg:pypi/fast-hashes

Affected ranges

Affected versions

0.*
0.1.0

Database specific

indicators 
{
    "package_integrity": [
        {
            "hashes": {
                "sha256": "fc7395773734883b3e79e6d2631a666fd89f9116dc9d086beb21e155bd315cec",
                "blake2b_256": "bfa7c40dbc7c0645414e68d9d2000db5271a18f43afee00d0734d039f38c163b",
                "md5": "4995e1c8753ee2527769e116b5e336ec"
            },
            "filename": "fast_hashes-0.1.0.tar.gz"
        }
    ],
    "evidence_files": [
        {
            "path": "setup.py",
            "sha256": "e3060a20faca6aea91d1643fe24cd6766bd885bb84a7ecbfc9c8e24b739028a3",
            "tlsh": "5841b67e86b625b17c54cb835017505589179b7b6c1474dcb9ee03045fcd31987fb07a"
        }
    ]
}
cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506",
        "name": "Embedded Malicious Code"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/fast-hashes/MAL-2026-13490.json"