#!/usr/bin/env bash

# Prowler - the handy cloud security tool (c) by Toni de la Fuente
#
# This Prowler check is licensed under a
# Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
#
# You should have received a copy of the license along with this
# work. If not, see <http://creativecommons.org/licenses/by-nc-sa/4.0/>.
#
# Remediation:
#
#   https://d1.awsstatic.com/whitepapers/compliance/AWS_CIS_Foundations_Benchmark.pdf
#
#   aws logs put-metric-filter \
#     --region us-east-1 \
#     --log-group-name CloudTrail/CloudWatchLogGroup \
#     --filter-name ConsoleSignInWithoutMfaCount \
#     --filter-pattern '{ $.eventName = "ConsoleLogin" && $.additionalEventData.MFAUsed != "Yes" }' \
#     --metric-transformations metricName=ConsoleSignInWithoutMfaCount,metricNamespace=CloudTrailMetrics,metricValue=1
#
#   aws cloudwatch put-metric-alarm \
#     --region us-east-1 \
#     --alarm-name ConsoleSignInWithoutMfaAlarm \
#     --alarm-description "Triggered by sign-in requests made without MFA." \
#     --metric-name ConsoleSignInWithoutMfaCount \
#     --namespace CloudTrailMetrics \
#     --statistic Sum \
#     --comparison-operator GreaterThanOrEqualToThreshold \
#     --evaluation-periods 1 \
#     --period 300 \
#     --threshold 1 \
#     --actions-enabled \
#     --alarm-actions arn:aws:sns:us-east-1:123456789012:CloudWatchAlarmTopic

CHECK_ID_check32="3.2"
CHECK_TITLE_check32="[check32] Ensure a log metric filter and alarm exist for Management Console sign-in without MFA (Scored)"
CHECK_SCORED_check32="SCORED"
CHECK_TYPE_check32="LEVEL1"
CHECK_ASFF_TYPE_check32="Software and Configuration Checks/Industry and Regulatory Standards/CIS AWS Foundations Benchmark"
CHECK_ASFF_RESOURCE_TYPE_check32="AwsCloudTrailTrail"
CHECK_ALTERNATE_check302="check32"

check32(){
  check3x '\$\.eventName\s*=\s*"ConsoleLogin".+\$\.additionalEventData\.MFAUsed\s*!=\s*"Yes"'
}