If this package is installed
Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.
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.
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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
Indicators of compromise
Shown defanged and not clickable. Search any indicator to find other packages using it.
Domains
- env-metadata[.]up[.]railway[.]app other packages →
URLs
- hxxps://env-metadata[.]up[.]railway[.]app/vbv_a8F3kL92xQ/manifest[.]json other packages →
- hxxps://env-metadata[.]up[.]railway[.]app/vbv_a8F3kL92xQ/appsetupw[.]exe other packages →
- hxxps://energy-total[.]up[.]railway[.]app/vbv_a8F3kL92xQ/manifest[.]json other packages →