Unexpected Removal of Sophos Firewall Rule
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About the rule
Rule Type
Anomaly
Rule Description
Flags removal of firewall rules at unexpected times or by unknown users.
Severity
Attention
Rule Requirement
Criteria
Action1: actionname = "sophos_rule_deleted" | isanomalous(User at an unusual Time) | isanomalous(User with abnormal Count) | isanomalous(Log source at an unusual Time) | isanomalous(Log source with abnormal Count) | isanomalous(Log source with unusual Username) select Action1.HOSTNAME,Action1.USERNAME,Action1.SOURCE_IP,Action1.RULENAME
Detection
Execution Mode
Intelligent
Log Sources
Sophos
