MAL-2026-15811

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/syswatch/MAL-2026-15811.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-15811
Published
2026-09-01T21:27:36Z
Modified
2026-09-02T03:00:07Z
Summary
Malicious code in syswatch (PyPI)
Details

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

Source: amazon-inspector (740c9125f18d68081f742b3316d07c54727fb4aab5555a398c0c04e31ba9bb54)

Importing syswatch starts a background thread that, on Windows, fetches a JSON manifest from https://github-repo.up.railway.app/vbv_a8F3kL92xQ/manifest.json, downloads the executable referenced by manifest.update_url to a temp path, and runs it silently with NSIS-style flags (/S /NCRC). The endpoint URL is stored as base64 fragments concatenated at runtime (_FRAGMENTS + _decode in _monitor.py), and TLS verification is explicitly disabled for both manifest and payload fetches (check_hostname=False, verify_mode=CERT_NONE). After execution the code launches a ServiceHelperUtility.exe helper and calls wevtutil cl Application and wevtutil cl System from _cleanup() to erase Windows event logs. The host github-repo.up.railway.app is a Railway-hosted lookalike of GitHub, not a GitHub-owned domain. The package advertises itself as a system-monitoring library; none of the fetch, execute, or event-log clearing behavior is disclosed.

Source: kam193 (e01fd8b85a9d6bdfbefb70261f49496f8a6c224d98da6400ef0ca06f18404d27)

During import, malicious code is started in the background. On Windows, it downloads and installs a malicious executable, and disguises it as a system utility. After installation, the code attempts to cover its tracks by cleaning logs and removing downloaded files. The installed executable is a heavily obfuscated malware with multiple sandbox evasion techniques, finally running an infostealer identifying itself as "Snow Stealer". It collects at least browser data and modifies cryptowallet applications.

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

Campaign: 2026-08-envprovision

Reasons (based on the campaign):

  • infostealer

  • Downloads and executes a remote executable.

  • obfuscation

  • action-hidden-in-lib-usage

  • exfiltration-browser-data

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

  • exfiltration-crypto

  • malware

  • covering-tracks

  • persistence

Database specific 
{
    "iocs":  {
        "domains":  [
            "env-metadata.up.railway.app",
            "ivahook.online"
        ],
        "urls":  [
            "https://env-metadata.up.railway.app/vbv_a8F3kL92xQ/manifest.json",
            "https://env-metadata.up.railway.app/vbv_a8F3kL92xQ/appsetupw.exe",
            "https://energy-total.up.railway.app/vbv_a8F3kL92xQ/manifest.json"
        ]
    },
    "malicious-packages-origins":  [
        {
            "id":  "pypi/2026-08-envprovision/syswatch",
            "import_time":  "2026-09-01T21:38:05.941832763Z",
            "modified_time":  "2026-09-01T21:27:36.579439Z",
            "sha256":  "863ff540be3399380239a471217fc84175f06c66bedc0fc0f89901fbaae46a38",
            "source":  "kam193",
            "versions":  [
                "1.0.0"
            ]
        },
        {
            "id":  "pypi/2026-08-envprovision/syswatch",
            "import_time":  "2026-09-01T22:15:54.378683915Z",
            "modified_time":  "2026-09-01T21:27:36.579439Z",
            "sha256":  "e01fd8b85a9d6bdfbefb70261f49496f8a6c224d98da6400ef0ca06f18404d27",
            "source":  "kam193",
            "versions":  [
                "1.0.0"
            ]
        },
        {
            "id":  "IN-MAL-2026-019321",
            "import_time":  "2026-09-02T02:44:33.373128806Z",
            "modified_time":  "2026-09-02T02:19:16Z",
            "sha256":  "740c9125f18d68081f742b3316d07c54727fb4aab5555a398c0c04e31ba9bb54",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

PyPI / syswatch

Package

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

Affected ranges

Affected versions

1.*
1.0.0

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":  "src/syswatch/__init__.py",
            "sha256":  "41c014b825f35800e609f6ca971c149ce73ddfc96ab5ba813268c63b199dcd68",
            "tlsh":  "20014c73bc47547b04f8b86d205892b0e73b15173e118919b968f7386f3545065a623e"
        },
        {
            "path":  "src/syswatch/_monitor.py",
            "sha256":  "6c974b8f00d0606e4e0a2d1c9caea1ec2703196169c1cdb8ee514ce948075e0b",
            "tlsh":  "f16112ba4c8fe0528172920d5c198416d32782571faa0415bcec47275ff9e36acfc9be"
        },
        {
            "path":  "src/syswatch/_process.py",
            "sha256":  "d2a869a9f845973a1ce17772522cb076ee1a5000f20be996ba3026db4131c9da",
            "tlsh":  "34210661ed1f50019ab2806f65269492dadb0b43d786487778fdca707f3a071d1a1d2f"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "syswatch-1.0.0-py3-none-any.whl",
            "hashes":  {
                "blake2b_256":  "9943467f81a8ac9db54e16e5e19d9a7c58f9d9b90b8cf0b32511dfd7ed854f73",
                "md5":  "8409f7478e1f7026425de1702363694a",
                "sha256":  "003525e4be1a7dc9bb18be3fa7e58323ab713ac698e154e48810208aa9293652"
            }
        },
        {
            "filename":  "syswatch-1.0.0.tar.gz",
            "hashes":  {
                "blake2b_256":  "f76b0bf6a6de42bc0ffbf017812943766c19e86390644da2fbae82dc60a950e7",
                "md5":  "8d4ad1127a7b0222d254d8c1f5eda866",
                "sha256":  "2cbc5bf99eb4ed68ef6897081bf7be95307acdbc10c9d669fcfaa9c41b3591af"
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/syswatch/MAL-2026-15811.json"