SSH authentication brute force attempts

Cortex XDR Analytics Alert Reference by Alert name

Product

Cortex XDR

Last date published

2024-10-08

Synopsis

Activation Period	14 Days
Training Period	30 Days
Test Period	15 Minutes
Deduplication Period	3 Hours
Required Data	Requires: XDR Agent
Detection Modules	Identity Analytics
Detector Tags
ATT&CK Tactic	Credential Access (TA0006)
ATT&CK Technique	Brute Force (T1110)
Severity	Informational

Description

A user attempted to authenticate via SSH an excessive number of times in a short period. This may indicate a brute force attack.

Attacker's Goals

Attackers attempt to log in to a remote host.

Investigative actions

Verify any successful authentication by the user account referenced by the alert, as these can indicate the attacker managed to guess the credentials.

Variations

Successful SSH Brute Force

Synopsis

ATT&CK Tactic	Credential Access (TA0006)
ATT&CK Technique	Brute Force (T1110)
Severity	Low

Description

A user successfully authenticated via SSH after an excessive number of failures in a short period.

Attacker's Goals

Attackers attempt to log in to a remote host.

Investigative actions

Verify any successful authentication by the user account referenced by the alert, as these can indicate the attacker managed to guess the credentials.

Possible SSH Brute Force

Synopsis

ATT&CK Tactic	Credential Access (TA0006)
ATT&CK Technique	Brute Force (T1110)
Severity	Low

Description

A user attempted to authenticate via SSH an excessive number of times in a short period. This may indicate a brute force attack.

Attacker's Goals

Attackers attempt to log in to a remote host.

Investigative actions

Verify any successful authentication by the user account referenced by the alert, as these can indicate the attacker managed to guess the credentials.