-
Notifications
You must be signed in to change notification settings - Fork 59
/
google_workspace_mfa_disabled.yaral
53 lines (48 loc) · 2.15 KB
/
google_workspace_mfa_disabled.yaral
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
/*
* 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 google_workspace_mfa_disabled {
meta:
author = "Google Cloud Security"
description = "Identifies when multi-factor authentication (MFA) is disabled for a Google Workspace organization. Security teams can monitor for changes to MFA configuration that may weaken the organization's security posture."
mitre_attack_tactic = "Persistence"
mitre_attack_technique = "Modify Authentication Process"
mitre_attack_url = "https://attack.mitre.org/techniques/T1556/"
mitre_attack_version = "v13.1"
type = "Alert"
data_source = "Workspace Activity"
severity = "High"
priority = "High"
events:
$ws.metadata.vendor_name = "Google Workspace"
$ws.metadata.product_name = "admin"
($ws.metadata.product_event_type = "ENFORCE_STRONG_AUTHENTICATION" or
$ws.metadata.product_event_type = "ALLOW_STRONG_AUTHENTICATION")
$ws.target.labels["new_value"] = "false"
outcome:
$risk_score = max(70)
$mitre_attack_tactic = "Persistence"
$mitre_attack_technique = "Modify Authentication Process"
$mitre_attack_technique_id = "T1556"
$event_count = count_distinct($ws.metadata.id)
$principal_ip = array_distinct($ws.principal.ip)
$principal_country = array_distinct($ws.principal.ip_geo_artifact.location.country_or_region)
$principal_state = array_distinct($ws.principal.ip_geo_artifact.location.state)
$principal_user_emails = array_distinct($ws.principal.user.email_addresses)
$target_user_emails = array_distinct($ws.target.user.email_addresses)
$principal_user_id = $ws.principal.user.userid
condition:
$ws
}