The bigops-nitro-events-table npm package version 35.4.2 includes a malicious _shim.js module that dynamically selects a platform-specific payload URL from reconstructed Cloudflare Workers domains and fallback DNS-TXT base64-encoded hosts. It downloads an executable binary to temporary system directories, sets executable permissions, and spawns it detached using shell commands. The payload filenames impersonate benign diagnostic artifacts, and the package spoofs the User-Agent header as 'node-fetch/2.6'. Execution is conditionally skipped if environment variables indicating telemetry opt-out or privacy preferences are set, indicating evasion techniques. The package falsely advertises itself as a trivial pub/sub adapter with no legitimate reason to fetch or execute native binaries.

This malicious package enables unauthorized remote code execution on systems that install and run bigops-nitro-events-table version 35.4.2. The downloaded binary runs detached from the main process, potentially allowing attackers to execute arbitrary code, persist on the system, and evade detection by blending in as telemetry. The evasion of privacy-conscious environments increases the risk of stealthy compromise.

No official patch or remediation is currently documented. Users should immediately remove and avoid using bigops-nitro-events-table version 35.4.2. Audit systems for presence of the package and any suspicious binaries in temporary directories such as /var/tmp/.cache_* or %TEMP%/dotnet_diag_*. Monitor for unexpected detached processes spawned by node applications. Consider restricting npm package sources to trusted registries and scanning dependencies for malicious code. Patch status is not yet confirmed — check the vendor advisory or trusted security sources for updates.