Supply Chain Abuse: npm/pip/nuget Spawning Suspicious Child Process (T1195.001)

Detects when common package management tools (npm, pip, nuget, python) spawn potentially malicious child processes such as cmd.exe, powershell.exe, curl.exe, or certutil.exe. This activity is a classic indicator of supply chain attacks where a compromised dependency or installation hook attempts to execute arbitrary commands or download secondary payloads on a developer or build machine.