MAL-2026-14389

Dashboard / Malicious Package / MAL-2026-14389

MAL-2026-14389

Summary: Malicious code in envprovision (PyPI)

Details: Source: amazon-inspector (a414ad5404fdeeb23c37f1580aeee8175765ba8613e8fadd1a0254bf0e25d2f6) envprovision 1.4.0 presents itself as an environment-diagnostics helper but its public `check()`/`sync()` API, on Windows, fetches a JSON manifest from a base64-obfuscated URL that decodes to https://env-metadata.up.railway.app/vbv_a8F3kL92xQ/manifest.json, downloads the referenced binary to a temp path, and executes it. TLS verification is disabled on both the manifest fetch and the binary download (ctx.check_hostname=False, ctx.verify_mode=ssl.CERT_NONE), so the payload can also be substituted by any on-path attacker. The dropped binary is invoked with NSIS silent-install flags (`/S`, `/NCRC`) built by character-list concatenation and hidden-window creation flags, then a follow-on `syshelpear.exe` is spawned detached (CREATE_NO_WINDOW|DETACHED_PROCESS) from a user-writable ProgramFiles/LOCALAPPDATA location as a persistence helper. After execution, `wevtutil cl Application` and `wevtutil cl System` are invoked to erase Windows event logs. The endpoint obfuscation, TLS-off fetch-and-execute of an opaque binary from a publisher-mismatched Railway subdomain, silent-install flag assembly, detached helper launch, and anti-forensic log clearing are inconsistent with the advertised diagnostics purpose and constitute an installer-side binary dropper with persistence. Source: kam193 (cf3a48b407852ec03ead22bb8c16c03f252ba5fafa5c86ed1a739427e7d7d869) Exported functions hide the malicious functionality. 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): - Downloads and executes a remote executable. - action-hidden-in-lib-usage - covering-tracks - persistence - The package contains code to detect if it is running in a sandbox environment. - obfuscation - malware - infostealer - exfiltration-browser-data - exfiltration-crypto

References: https://www.virustotal.com/gui/file/d49fa53949d9350ee34c4e1279ee72e6fafc294ae338825f66c33c7f188b878c/details, https://www.virustotal.com/gui/file-analysis/MGQ3ZGViMWFhYzU0YjY3ODllZWI1ZGJkMDY4Nzk3NGM6MTc4NzUxODgyOQ==, https://bad-packages.kam193.eu/pypi/package/envprovision, https://pypi.org/project/envprovision/1.4.0/, https://pypi.org/project/envprovision/1.3.0/, https://pypi.org/project/envprovision/1.2.0/