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azure-eventhub-ad-geoip.rules
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azure-eventhub-ad-geoip.rules
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# Sagan azure-eventhub-ad-geoip.rules
# Copyright (c) 2009-2023. Quadrant Information Security <www.quadrantsec.com>
# All rights reserved.
#
# Please submit any custom rules or ideas to [email protected] or the sagan-sigs mailing list
#
#*************************************************************
# Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
# following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this list of conditions and the following
# disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
# following disclaimer in the documentation and/or other materials provided with the distribution.
# * Neither the name of the nor the names of its contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES,
# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
#*************************************************************
# These rules read JSON, so Sagan message JSON processing needs to be enabled within your sagan.yaml
#alert any $HOME_NET any -> $EXTERNAL_NET any (msg: "[AZURE-EVENTHUB-AD-GEOIP] Account lockout from outside HOME_COUNTRY"; program: azureEventHub; json_content:".resultType","50053"; json_map: "src_ip", ".callerIpAddress"; json_map: "dest_ip", ".callerIpAddress"; json_map: "username", ".properties.userPrincipalName"; classtype: unsuccessful-user; country_code: track by_src, isnot $HOME_COUNTRY; reference: url,docs.microsoft.com/en-us/azure/active-directory/reports-monitoring/reference-sign-ins-error-codes; sid:5004775; rev: 3;)
#alert any $HOME_NET any -> $EXTERNAL_NET any (msg: "[AZURE-EVENTHUB-AD-GEOIP] Brute Force [2]"; program: azureEventHub; json_content:"category","AuditLogs"; json_nocase; json_content:".result","failure"; json_map: "src_ip", ".callerIpAddress"; json_map: "dest_ip", ".callerIpAddress"; json_map: "username", ".properties.userPrincipalName"; classtype: unsuccessful-user; country_code: track by_src, isnot $HOME_COUNTRY; reference: url,docs.microsoft.com/en-us/azure/active-directory/reports-monitoring/reference-azure-monitor-audit-log-schema; sid:5004778; rev: 3;)
alert any $HOME_NET any -> $EXTERNAL_NET any (msg: "[AZURE-EVENTHUB-AD-GEOIP] Account logon from outside HOME_COUNTRY"; program:azureEventHub; json_content:".resultType","0"; json_map: "src_ip", ".callerIpAddress"; json_map: "dest_ip", ".callerIpAddress"; content:!"|22|riskLevelAggregated|22 3a| |22|none|22 2c| |22|riskLevelDuringSignIn|22 3a| |22|none|22|"; json_map: "username", ".properties.userPrincipalName"; classtype:successful-user; country_code: track by_src, isnot $HOME_COUNTRY; sid:5010942; rev:2; metadata:deployment Endpoint,affected_product NONE,affected_version NONE,mitigation NONE,deprecation_reason NONE,tag NONE, created_at 2023_02_22, updated_at 2024_05_02, mitre_tactic_id NONE, mitre_technique_id NONE;)