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DETECTION OVERVIEW
Risk Factors
Brute force attacks on SSH services, which are enabled by default on many devices, are low cost and relatively easy to perform. Even though brute force attacks are noisy, the attacker can effectively compromise a device after obtaining SSH credentials.
The system might change the risk score for this detection.
Kill Chain
Risk Score
60
Before an attacker can gain access to an SSH account and remotely run commands on other devices, the attacker must first acquire valid SSH credentials. A brute force attack is a method for guessing a weak user password. Brute force attacks can occur manually through trial and error or with password cracking tools.
Disable SSH on devices that do not require SSH access
Limit the number of login attempts per SSH session
Only allow incoming SSH connections from trusted devices, such as administrator workstations
Implement a strong password policy
Do not reuse passwords
Rely on public key authentication, which is more resilient to brute force attacks than password authentication, by disabling PasswordAuthentication in sshd_config
