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okta_threatinsight_targeted_brute_force_attack.yaral
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okta_threatinsight_targeted_brute_force_attack.yaral
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/*
* Copyright 2023 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
rule okta_threatinsight_targeted_brute_force_attack {
meta:
author = "Google Cloud Security"
description = "Okta ThreatInsight detects access requests from known malicious IPs targeting a specific org."
reference = "https://help.okta.com/en-us/Content/Topics/Security/threat-insight/configure-threatinsight-system-log.htm"
mitre_attack_tactic = "Credential Access"
mitre_attack_technique = "Brute Force"
mitre_attack_url = "https://attack.mitre.org/techniques/T1110/"
mitre_attack_version = "v13.1"
type = "Alert"
data_source = "Okta"
severity = "Medium"
priority = "Medium"
events:
$bruteforce.metadata.product_name = "Okta"
$bruteforce.metadata.vendor_name = "Okta"
$bruteforce.metadata.event_type = "USER_UNCATEGORIZED"
$bruteforce.metadata.product_event_type = "security.attack.start"
$bruteforce.principal.user.userid = $userid
match:
$userid over 1h
outcome:
$risk_score = max(35)
$mitre_attack_tactic = "Credential Access"
$mitre_attack_technique = "Brute Force"
$principal_user_userid = array_distinct($bruteforce.principal.user.userid)
$principal_user_email_addresses = array_distinct($bruteforce.principal.user.email_addresses)
$security_result_summary = array_distinct($bruteforce.security_result.summary)
$security_result_severity = array_distinct($bruteforce.security_result.severity)
condition:
$bruteforce
}