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Ransomware Guide

Guidance
Cybersecurity

Cybersecurity and Infrastructure Security Agency, September 2020

Summary

Ransomware is a form of malware designed to encrypt files on a device, rendering any files and the systems that rely on them unusable. Malicious actors then demand ransom in exchange for decryption. In recent years, ransomware incidents have become increasingly prevalent among the Nation’s state, local, tribal, and territorial (SLTT) government entities and critical infrastructure organizations.

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