MAL-2026-15811

Dashboard / Malicious Package / MAL-2026-15811

MAL-2026-15811

Summary: Malicious code in syswatch (PyPI)

Details: 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

References: https://www.virustotal.com/gui/file/d49fa53949d9350ee34c4e1279ee72e6fafc294ae338825f66c33c7f188b878c/details, https://www.virustotal.com/gui/file-analysis/MGQ3ZGViMWFhYzU0YjY3ODllZWI1ZGJkMDY4Nzk3NGM6MTc4NzUxODgyOQ==, https://bad-packages.kam193.eu/pypi/package/syswatch, https://pypi.org/project/syswatch/1.0.0/