Ransomware is malicious software that encrypts files or systems and demands payment for recovery.
It can enter a business through phishing emails, stolen passwords, exposed remote access systems, unpatched software, malicious downloads, or compromised vendors.
Once inside, some ransomware groups move through the network before launching the final attack. They may steal data, disable security tools, and try to delete backups.
That is why ransomware defense must include more than antivirus. Businesses need MFA, patching, endpoint monitoring, restricted administrative access, network security, tested backups, and employee training.
Backups are especially important, but they must be protected from the attacker. If backup systems use the same credentials and remain fully connected to the network, ransomware may target them too.
The goal is to make every stage of an attack harder. Even if one control fails, another layer should slow or stop the attacker.