From 187760ec157787668cd22ba4030efb8892a1a44c Mon Sep 17 00:00:00 2001
From: xpk <xpk@headdesk.me>
Date: Fri, 29 Jan 2021 14:39:58 +0800
Subject: [PATCH] UPD: added CIS 3.x CWL alarms

---
 .../cloudtrail_cwlogs/cw-loggroup.tf          | 342 ++++++++++++++++++
 1 file changed, 342 insertions(+)

diff --git a/modules/security_identity_compliance/cloudtrail_cwlogs/cw-loggroup.tf b/modules/security_identity_compliance/cloudtrail_cwlogs/cw-loggroup.tf
index 47fdc4b..2735d56 100644
--- a/modules/security_identity_compliance/cloudtrail_cwlogs/cw-loggroup.tf
+++ b/modules/security_identity_compliance/cloudtrail_cwlogs/cw-loggroup.tf
@@ -33,3 +33,345 @@ resource "aws_cloudwatch_metric_alarm" "cis11-rootaccess-alarm" {
 
   // alarm_actions     = []
 }
+
+// CIS 3.x benchmark from asecure.cloud https://asecure.cloud/p/monitoring_cis_benchmark/
+
+resource "aws_cloudwatch_metric_alarm" "CwAlarm2" {
+  alarm_name = "cis-unauthorized_api_calls"
+  alarm_description = "A CloudWatch Alarm that triggers if Multiple unauthorized actions or logins attempted."
+  metric_name = "UnauthorizedAttemptCount"
+  namespace = "CloudTrailMetrics"
+  statistic = "Sum"
+  period = "60"
+  threshold = "1"
+  evaluation_periods = "1"
+  comparison_operator = "GreaterThanOrEqualToThreshold"
+  // alarm_actions = [""]
+  treat_missing_data = "notBreaching"
+}
+
+resource "aws_cloudwatch_log_metric_filter" "MetricFilter2" {
+  log_group_name = aws_cloudwatch_log_group.ct-cwl.name
+  pattern = "{ ($.errorCode = \"*UnauthorizedOperation\") || ($.errorCode = \"AccessDenied*\") }"
+  name = "UnauthorizedAttemptCount"
+
+  metric_transformation {
+  name = "UnauthorizedAttemptCount"
+  value = "1"
+  namespace = "CloudTrailMetrics"
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "CwAlarm3" {
+  alarm_name = "cis-no_mfa_console_logins"
+  alarm_description = "A CloudWatch Alarm that triggers if there is a Management Console sign-in without MFA."
+  metric_name = "ConsoleSigninWithoutMFA"
+  namespace = "CloudTrailMetrics"
+  statistic = "Sum"
+  period = "60"
+  threshold = "1"
+  evaluation_periods = "1"
+  comparison_operator = "GreaterThanOrEqualToThreshold"
+  // alarm_actions = [""]
+  treat_missing_data = "notBreaching"
+}
+
+resource "aws_cloudwatch_log_metric_filter" "MetricFilter3" {
+  log_group_name = aws_cloudwatch_log_group.ct-cwl.name
+  pattern = "{($.eventName = \"ConsoleLogin\") && ($.additionalEventData.MFAUsed != \"Yes\") && ($.responseElements.ConsoleLogin != \"Failure\") && ($.additionalEventData.SamlProviderArn NOT EXISTS) }"
+  name = "ConsoleSigninWithoutMFA"
+
+  metric_transformation {
+    name = "ConsoleSigninWithoutMFA"
+    value = "1"
+    namespace = "CloudTrailMetrics"
+  }
+
+}
+
+resource "aws_cloudwatch_metric_alarm" "CwAlarm4" {
+  alarm_name = "cis-iam_policy_changes"
+  alarm_description = "A CloudWatch Alarm that triggers when changes are made to IAM policies. Events include IAM policy creation/deletion/update operations as well as attaching/detaching policies from IAM users, roles or groups."
+  metric_name = "IAMPolicyEventCount"
+  namespace = "CloudTrailMetrics"
+  statistic = "Sum"
+  period = "300"
+  threshold = "1"
+  evaluation_periods = "1"
+  comparison_operator = "GreaterThanOrEqualToThreshold"
+  // alarm_actions = [""]
+  treat_missing_data = "notBreaching"
+}
+
+resource "aws_cloudwatch_log_metric_filter" "MetricFilter4" {
+  log_group_name = aws_cloudwatch_log_group.ct-cwl.name
+  pattern = "{($.eventName=DeleteGroupPolicy)||($.eventName=DeleteRolePolicy)||($.eventName=DeleteUserPolicy)||($.eventName=PutGroupPolicy)||($.eventName=PutRolePolicy)||($.eventName=PutUserPolicy)||($.eventName=CreatePolicy)||($.eventName=DeletePolicy)||($.eventName=CreatePolicyVersion)||($.eventName=DeletePolicyVersion)||($.eventName=AttachRolePolicy)||($.eventName=DetachRolePolicy)||($.eventName=AttachUserPolicy)||($.eventName=DetachUserPolicy)||($.eventName=AttachGroupPolicy)||($.eventName=DetachGroupPolicy)}"
+  name = "IAMPolicyEventCount"
+
+  metric_transformation {
+    name = "IAMPolicyEventCount"
+    value = "1"
+    namespace = "CloudTrailMetrics"
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "CwAlarm5" {
+  alarm_name = "cis-cloudtrail_changes"
+  alarm_description = "A CloudWatch Alarm that triggers when changes are made to CloudTrail."
+  metric_name = "CloudTrailEventCount"
+  namespace = "CloudTrailMetrics"
+  statistic = "Sum"
+  period = "300"
+  threshold = "1"
+  evaluation_periods = "1"
+  comparison_operator = "GreaterThanOrEqualToThreshold"
+  // alarm_actions = [""]
+  treat_missing_data = "notBreaching"
+}
+
+resource "aws_cloudwatch_log_metric_filter" "MetricFilter5" {
+  log_group_name = aws_cloudwatch_log_group.ct-cwl.name
+  pattern = "{ ($.eventName = CreateTrail) || ($.eventName = UpdateTrail) || ($.eventName = DeleteTrail) || ($.eventName = StartLogging) || ($.eventName = StopLogging) }"
+  name = "CloudTrailEventCount"
+
+  metric_transformation {
+    name = "CloudTrailEventCount"
+    value = "1"
+    namespace = "CloudTrailMetrics"
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "CwAlarm6" {
+  alarm_name = "cis-failed_console_logins"
+  alarm_description = "A CloudWatch Alarm that triggers if there are AWS Management Console authentication failures."
+  metric_name = "ConsoleLoginFailures"
+  namespace = "CloudTrailMetrics"
+  statistic = "Sum"
+  period = "300"
+  threshold = "1"
+  evaluation_periods = "1"
+  comparison_operator = "GreaterThanOrEqualToThreshold"
+  // alarm_actions = [""]
+  treat_missing_data = "notBreaching"
+}
+
+resource "aws_cloudwatch_log_metric_filter" "MetricFilter6" {
+  log_group_name = aws_cloudwatch_log_group.ct-cwl.name
+  pattern = "{ ($.eventName = ConsoleLogin) && ($.errorMessage = \"Failed authentication\") }"
+  name = "ConsoleLoginFailures"
+
+  metric_transformation {
+    name = "ConsoleLoginFailures"
+    value = "1"
+    namespace = "CloudTrailMetrics"
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "CwAlarm7" {
+  alarm_name = "cis-disabled_deleted_cmks"
+  alarm_description = "A CloudWatch Alarm that triggers if customer created CMKs get disabled or scheduled for deletion."
+  metric_name = "KMSCustomerKeyDeletion"
+  namespace = "CloudTrailMetrics"
+  statistic = "Sum"
+  period = "60"
+  threshold = "1"
+  evaluation_periods = "1"
+  comparison_operator = "GreaterThanOrEqualToThreshold"
+  //  alarm_actions = [""]
+  treat_missing_data = "notBreaching"
+}
+
+resource "aws_cloudwatch_log_metric_filter" "MetricFilter7" {
+  log_group_name = aws_cloudwatch_log_group.ct-cwl.name
+  pattern = "{ ($.eventSource = kms.amazonaws.com) &&  (($.eventName=DisableKey) || ($.eventName=ScheduleKeyDeletion)) }"
+  name = "KMSCustomerKeyDeletion"
+
+  metric_transformation {
+    name = "KMSCustomerKeyDeletion"
+    value = "1"
+    namespace = "CloudTrailMetrics"
+  }
+
+}
+
+resource "aws_cloudwatch_metric_alarm" "CwAlarm8" {
+  alarm_name = "cis-s3_changes"
+  alarm_description = "A CloudWatch Alarm that triggers when changes are made to an S3 Bucket."
+  metric_name = "S3BucketActivityEventCount"
+  namespace = "CloudTrailMetrics"
+  statistic = "Sum"
+  period = "300"
+  threshold = "1"
+  evaluation_periods = "1"
+  comparison_operator = "GreaterThanOrEqualToThreshold"
+  // alarm_actions = [""]
+  treat_missing_data = "notBreaching"
+}
+
+resource "aws_cloudwatch_log_metric_filter" "MetricFilter8" {
+  log_group_name = aws_cloudwatch_log_group.ct-cwl.name
+  pattern = "{ ($.eventSource = s3.amazonaws.com) && (($.eventName = PutBucketAcl) || ($.eventName = PutBucketPolicy) || ($.eventName = PutBucketCors) || ($.eventName = PutBucketLifecycle) || ($.eventName = PutBucketReplication) || ($.eventName = DeleteBucketPolicy) || ($.eventName = DeleteBucketCors) || ($.eventName = DeleteBucketLifecycle) || ($.eventName = DeleteBucketReplication)) }"
+  name = "S3BucketActivityEventCount"
+
+  metric_transformation {
+  name = "S3BucketActivityEventCount"
+  value = "1"
+  namespace = "CloudTrailMetrics"
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "CwAlarm9" {
+  alarm_name = "cis-config_changes"
+  alarm_description = "A CloudWatch Alarm that triggers when changes are made to AWS Config."
+  metric_name = "CloudTrailEventCount"
+  namespace = "CloudTrailMetrics"
+  statistic = "Sum"
+  period = "300"
+  threshold = "1"
+  evaluation_periods = "1"
+  comparison_operator = "GreaterThanOrEqualToThreshold"
+  // alarm_actions = [""]
+  treat_missing_data = "notBreaching"
+}
+
+resource "aws_cloudwatch_log_metric_filter" "MetricFilter9" {
+  log_group_name = aws_cloudwatch_log_group.ct-cwl.name
+  pattern = "{ ($.eventName = PutConfigurationRecorder) || ($.eventName = StopConfigurationRecorder) || ($.eventName = DeleteDeliveryChannel) || ($.eventName = PutDeliveryChannel) }"
+  name = "CloudTrailEventCount"
+
+  metric_transformation {
+  name = "CloudTrailEventCount"
+  value = "1"
+  namespace = "CloudTrailMetrics"
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "CwAlarm10" {
+  alarm_name = "cis-securitygroup_changes"
+  alarm_description = "A CloudWatch Alarm that triggers when changes are made to Security Groups."
+  metric_name = "SecurityGroupEventCount"
+  namespace = "CloudTrailMetrics"
+  statistic = "Sum"
+  period = "300"
+  threshold = "1"
+  evaluation_periods = "1"
+  comparison_operator = "GreaterThanOrEqualToThreshold"
+  // alarm_actions = [""]
+  treat_missing_data = "notBreaching"
+}
+
+resource "aws_cloudwatch_log_metric_filter" "MetricFilter10" {
+  log_group_name = aws_cloudwatch_log_group.ct-cwl.name
+  pattern = "{ ($.eventName = AuthorizeSecurityGroupIngress) || ($.eventName = AuthorizeSecurityGroupEgress) || ($.eventName = RevokeSecurityGroupIngress) || ($.eventName = RevokeSecurityGroupEgress) || ($.eventName = CreateSecurityGroup) || ($.eventName = DeleteSecurityGroup) }"
+  name = "SecurityGroupEventCount"
+
+  metric_transformation {
+  name = "SecurityGroupEventCount"
+  value = "1"
+  namespace = "CloudTrailMetrics"
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "CwAlarm11" {
+  alarm_name = "cis-nacl_changes"
+  alarm_description = "A CloudWatch Alarm that triggers when changes are made to Network ACLs."
+  metric_name = "NetworkAclEventCount"
+  namespace = "CloudTrailMetrics"
+  statistic = "Sum"
+  period = "300"
+  threshold = "1"
+  evaluation_periods = "1"
+  comparison_operator = "GreaterThanOrEqualToThreshold"
+  // alarm_actions = [""]
+  treat_missing_data = "notBreaching"
+  }
+
+resource "aws_cloudwatch_log_metric_filter" "MetricFilter11" {
+  log_group_name = aws_cloudwatch_log_group.ct-cwl.name
+  pattern = "{ ($.eventName = CreateNetworkAcl) || ($.eventName = CreateNetworkAclEntry) || ($.eventName = DeleteNetworkAcl) || ($.eventName = DeleteNetworkAclEntry) || ($.eventName = ReplaceNetworkAclEntry) || ($.eventName = ReplaceNetworkAclAssociation) }"
+  name = "NetworkAclEventCount"
+
+  metric_transformation {
+    name = "NetworkAclEventCount"
+    value = "1"
+    namespace = "CloudTrailMetrics"
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "CwAlarm12" {
+  alarm_name = "cis-igw_changes"
+  alarm_description = "A CloudWatch Alarm that triggers when changes are made to an Internet Gateway in a VPC."
+  metric_name = "GatewayEventCount"
+  namespace = "CloudTrailMetrics"
+  statistic = "Sum"
+  period = "300"
+  threshold = "1"
+  evaluation_periods = "1"
+  comparison_operator = "GreaterThanOrEqualToThreshold"
+  // alarm_actions = [""]
+  treat_missing_data = "notBreaching"
+}
+
+resource "aws_cloudwatch_log_metric_filter" "MetricFilter12" {
+  log_group_name = aws_cloudwatch_log_group.ct-cwl.name
+  pattern = "{ ($.eventName = CreateCustomerGateway) || ($.eventName = DeleteCustomerGateway) || ($.eventName = AttachInternetGateway) || ($.eventName = CreateInternetGateway) || ($.eventName = DeleteInternetGateway) || ($.eventName = DetachInternetGateway) }"
+  name = "GatewayEventCount"
+
+  metric_transformation {
+    name = "GatewayEventCount"
+    value = "1"
+    namespace = "CloudTrailMetrics"
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "CwAlarm13" {
+  alarm_name = "cis-vpc_routetable_changes"
+  alarm_description = "A CloudWatch Alarm that triggers when changes are made to a VPC's Route Table."
+  metric_name = "VpcRouteTableEventCount"
+  namespace = "CloudTrailMetrics"
+  statistic = "Sum"
+  period = "300"
+  threshold = "1"
+  evaluation_periods = "1"
+  comparison_operator = "GreaterThanOrEqualToThreshold"
+  // alarm_actions = [""]
+  treat_missing_data = "notBreaching"
+}
+
+resource "aws_cloudwatch_log_metric_filter" "MetricFilter13" {
+  log_group_name = aws_cloudwatch_log_group.ct-cwl.name
+  pattern = "{ ($.eventName = AssociateRouteTable) || ($.eventName = CreateRoute) || ($.eventName = CreateRouteTable) || ($.eventName = DeleteRoute) || ($.eventName = DeleteRouteTable) || ($.eventName = ReplaceRoute) || ($.eventName = ReplaceRouteTableAssociation) || ($.eventName = DisassociateRouteTable) }"
+  name = "VpcRouteTableEventCount"
+
+  metric_transformation {
+    name = "VpcRouteTableEventCount"
+    value = "1"
+    namespace = "CloudTrailMetrics"
+  }
+}
+
+resource "aws_cloudwatch_metric_alarm" "CwAlarm14" {
+  alarm_name = "cis-vpc_changes"
+  alarm_description = "A CloudWatch Alarm that triggers when changes are made to a VPC."
+  metric_name = "VpcEventCount"
+  namespace = "CloudTrailMetrics"
+  statistic = "Sum"
+  period = "300"
+  threshold = "1"
+  evaluation_periods = "1"
+  comparison_operator = "GreaterThanOrEqualToThreshold"
+  // alarm_actions = [""]
+  treat_missing_data = "notBreaching"
+}
+
+resource "aws_cloudwatch_log_metric_filter" "MetricFilter14" {
+  log_group_name = aws_cloudwatch_log_group.ct-cwl.name
+  pattern = "{ ($.eventName = CreateVpc) || ($.eventName = DeleteVpc) || ($.eventName = ModifyVpcAttribute) || ($.eventName = AcceptVpcPeeringConnection) || ($.eventName = CreateVpcPeeringConnection) || ($.eventName = DeleteVpcPeeringConnection) || ($.eventName = RejectVpcPeeringConnection) || ($.eventName = AttachClassicLinkVpc) || ($.eventName = DetachClassicLinkVpc) || ($.eventName = DisableVpcClassicLink) || ($.eventName = EnableVpcClassicLink) }"
+  name = "VpcEventCount"
+
+  metric_transformation {
+    name = "VpcEventCount"
+    value = "1"
+    namespace = "CloudTrailMetrics"
+  }
+}
\ No newline at end of file