Developer Builds Lightweight Windows Security Monitor That Alerts via Telegram

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A developer created a personal Windows security monitoring tool after growing frustrated with bloated antivirus software consuming hundreds of megabytes of RAM. The lightweight Python-based program runs under 30MB and watches for suspicious activity such as new executables in temp folders, unexpected USB connections, and Windows Defender being disabled. Alerts are delivered directly to the user's phone via Telegram's Bot API, with minor events batched into a daily evening summary to reduce notification fatigue. The tool, compiled into a standalone executable using PyInstaller, took significant iteration to refine — particularly around eliminating false positives triggered by routine Windows and browser activity. The developer notes that understanding a system's normal behavior was the biggest challenge in building an effective security monitor.

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ProgrammingDEV Community ·

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