The agency’s diverse arsenal of malware tools—many described in leaked NSA documents but many more that were not—could steal phone conversations, text threads, emails, and industrial blueprints. Other malware could hot-mic an infected computer and capture any conversations in close proximity. Still other tools could steal screenshots, deny a target access to certain websites, shut down computers remotely, corrupt or delete all their data, and grab their keystrokes, search terms, browsing histories, passwords, and any keys necessary to unscramble encrypted data.
