MAL-2026-17240

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/aseitylab/MAL-2026-17240.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17240
Published
2026-09-28T21:24:44Z
Modified
2026-09-29T04:30:05Z
Summary
Malicious code in aseitylab (PyPI)
Details

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

Source: amazon-inspector (9b47f0f7a0776cad3d4c83604d35a0023a250d2f035e58129233095aa2b110a3)

aseitylab/_shimdata.py contains a large base85-encoded, zlib-compressed blob stored as DATA. aseitylab/compat.py defines _ensure_compat(), which base85-decodes and zlib-inflates DATA and passes the result to exec(compile(..., '', 'exec')). setup.py imports aseitylab.compat and invokes _ensure_compat() during package build/install, and aseitylab/init.py calls the same function on every import, so the decoded payload runs both when the package is installed and whenever it is imported. Execution is gated by environment variables (ASEITYLAB_COMPAT=0, DAS_STAGED=1) that allow the payload to be suppressed in build or test environments. The README advertises a pure-Python task-orchestration toolkit with no runtime dependencies, which does not require a compressed, encoded executable blob shipped as 'compatibility shim data'. MANIFEST.in additionally excludes file names (loader_payload.py, make_armed.py, armed.json, manifest.benign.json) consistent with a build harness that produces separate 'armed' and 'benign' tarballs. The contents of the executed payload are not inspectable from the shipped source; installing or importing the package hands arbitrary code execution to whatever DATA decodes to.

Source: kam193 (24b99c2059065cbe44f7dac2f1d2878b237c58150c0890baa1856852e76fcb24)

During installation, obfuscated code is used to fetch code hidden in an image containing a Python application with a native extension module. This module holds an obfuscated infostealer which collects sensitive data and exfiltrates them to a C2 server retrieved from transaction history in the Polygon blockchain.

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

Campaign: 2026-09-donutautosellsrc

Reasons (based on the campaign):

  • infostealer

  • Downloads and executes a remote executable.

  • obfuscation

  • The package contains code to detect if it is running in a sandbox environment.

  • malware

  • native-extension

  • steganography

  • c2-in-blockchain

Database specific 
{
    "iocs":  {
        "domains":  [
            "thisisafalsepositive.st",
            "sltnnt.ru"
        ],
        "urls":  [
            "https://thisisafalsepositive.st/cdn/v2/9f4e7a2c1b8d.png",
            "https://thisisafalsepositive.st/cdn/v2/promotion/manifest.json"
        ]
    },
    "malicious-packages-origins":  [
        {
            "id":  "pypi/2026-09-donutautosellsrc/aseitylab",
            "import_time":  "2026-09-28T22:18:26.131496416Z",
            "modified_time":  "2026-09-28T21:24:44.922816Z",
            "sha256":  "24b99c2059065cbe44f7dac2f1d2878b237c58150c0890baa1856852e76fcb24",
            "source":  "kam193",
            "versions":  [
                "0.1.0",
                "0.1.1"
            ]
        },
        {
            "id":  "IN-MAL-2026-020624",
            "import_time":  "2026-09-29T04:22:41.724812405Z",
            "modified_time":  "2026-09-29T03:47:52Z",
            "sha256":  "9b47f0f7a0776cad3d4c83604d35a0023a250d2f035e58129233095aa2b110a3",
            "source":  "amazon-inspector",
            "versions":  [
                "0.1.0"
            ]
        }
    ]
}
References
Credits

Affected packages

PyPI / aseitylab

Package

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

Affected ranges

Affected versions

0.*
0.1.0
0.1.1

Database specific

cwes 
[
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files":  [
        {
            "path":  "aseitylab/compat.py",
            "sha256":  "67a8e98c2d83e13097bf6138c7ca7bc388830df888ec12bc56438859e7adb20b",
            "tlsh":  "e6019c606d4d1cb2e230b06e8964e4bcc26d5b07be266006bd8c47bc2f30f51d2e28dc"
        },
        {
            "path":  "aseitylab/_shimdata.py",
            "sha256":  "aad65af02297f9594503919fb08845ade61092e9116f314c813ced6d9ca266a2",
            "tlsh":  "ad31fab54d504edae1ac134423302cfeed221e3d4be69675f9d048d2166e0548550aff"
        },
        {
            "path":  "MANIFEST.in",
            "sha256":  "9f2f4b9007fbab4bf4176ae67d7b3787493575da533a3e0d35a0f6e045ee9c32",
            "tlsh":  "7fc02230865cb056820d04ea2e609e14a19a2e073aa36313c6090cedec0b5c8d0176aa"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/aseitylab/MAL-2026-17240.json"