Change log for IMPERVA_WAF

Date	Changes
2024-11-14	Enhancement: - Added support to handle new log format.
2024-10-10	Enhancement: - Mapped "metadata.vendor_name" to "Imperva Cloud WAF".
2024-10-03	Enhancement: - Mapped "cn1" to "network.http.response_code".
2024-09-05	Enhancement: - Added support to handle new log format.
2024-08-27	Enhancement: - Changed mapping of "log.imperva.ids.account_name" from "metadata.product_event_type" to "target.user.user_display_name".
2024-06-25	Enhancement: - Added support to handle JSON logs.
2024-04-02	Enhancement: - Mapped "log.imperva.request_user" to "security_result.detection_fields". - Mapped "log.imperva.classified_client" to "security_result.detection_fields".
2024-02-26	Enhancement: - Mapped "log.imperva.request_session_id" to "network.session_id". - Mapped ""log.imperva.successful_logins_last_24h","log.imperva.path" and "log.imperva.failed_logins_last_24h" to "security_result.detection_fields". - Mapped "log.imperva.risk_reason" to "security_result.severity_details" and "security_result.severity". - Mapped "additional_factor","log.imperva.device_reputation" and "log.imperva.credentials_leaked" to "additional.fields". - Mapped "log.imperva.fingerprint" to "security_result.description". - Mapped "log.imperva.referrer" to "network.http.referral_url". - Mapped "log.imperva.classified_client" to "principal.process.file.full_path"
2024-02-06	Enhancement: - Initialized "accept_encoding_label", "site_name_label", "random_id_label", "request_type_label", "accept_language_label", "headers_connection_label", "zuid_labels", "site_id_label", "policy_id", "policy_name", "selector_derived_id", "hsig", "selector", "detection_fields_event_action", "detection_fields_event_context", "detection_fields_significant_domain_name", and "detection_fields_domain_risk" to null inside the "for loop" for json_array.
2024-01-27	Enhancement: - Mapped "description" to "security_result.threat_name". - Mapped "severity" to "security_result.threat_id". - Mapped "kv.src", "src" and "log.client.ip" to "principal.asset.ip". - Mapped "kv.dst" and "dst" to "target.asset.ip". - Mapped "kv.dvc" to "about.asset.ip". - Mapped "kv.cs9" and "cs9" to "security_result.rule_name". - Mapped "kv.fileType" and "fileType" to "security_result.rule_type". - Mapped "dst" to "target.asset.ip". - Mapped "xff" and "forwardedIp" to "intermediary.asset.ip". - Mapped "log.client.domain" to "principal.asset.hostname". - Mapped "log.server.domain" to "target.asset.hostname".
2023-10-16	Bug-Fix: - Initialized "security_result" and "security_action" to null inside the "for loop" for json_array. - Added a null check before merging "security_action" to "security_result.action". - When "log.imperva.abp.monitor_action" is "block", then mapped "security_action" to "BLOCK".
2023-09-26	Enhancement: - Mapped "significant_domain_name", "domain_risk", "violated_directives" to "security_result.detection_fields" in CSP logs.
2023-08-07	Bug-fix - - Added support to parse array of JSON logs. - Added Grok pattern to check for hostname before mapping "xff" to "intermediary.hostname".
2023-06-16	Bug-fix - - Mapped "imperva.audit_trail.event_action" to "security_result.detection_fields". - Mapped "imperva.audit_trail.event_action_description" to "security_result.detection_fields". - Mapped "imperva.audit_trail.event_context" to "security_result.detection_fields". - Mapped "imperva.audit_trail.event_context_description" to "security_result.detection_fields". - Fixed Timestamp parsing issues. - Dropped malformed logs.
2023-06-16	Bug-fix - - Mapped "imperva.audit_trail.event_action" to "security_result.detection_fields". - Mapped "imperva.audit_trail.event_action_description" to "security_result.detection_fields". - Mapped "imperva.audit_trail.event_context" to "security_result.detection_fields". - Mapped "imperva.audit_trail.event_context_description" to "security_result.detection_fields". - Fixed Timestamp parsing issues. - Dropped malformed logs.
2023-06-08	Enhancement - - Mapped "imperva.abp.apollo_rule_versions" to "security_result.detection_fields". - Mapped "imperva.abp.bot_violations" to "security_result.detection_fields". - Mapped "imperva.abp.bot_behaviors" to "security_result.detection_fields". - Mapped "imperva.abp.bot_deciding_condition_ids" to "security_result.detection_fields". - Mapped "imperva.abp.bot_deciding_condition_names " to "security_result.detection_fields". - Mapped "imperva.abp.bot_triggered_condition_ids" to "security_result.detection_fields". - Mapped "imperva.abp.bot_triggered_condition_names" to "security_result.detection_fields".
2023-04-26	Enhancement - - Defined the field "kv.src" in the statedata. - Mapped "kvdata.ver" to "network.tls.version" and network.tls.cipher. - Mapped "kvdata.sip" to "principal.ip". - Mapped "kvdata.spt" to "principal.port". - Mapped "kvdata.act" to 'security_result.action_details'. - Mapped "kvdata.app" to 'network.application_protocol'. - Mapped "kvdata.requestMethod" to "network.http.method".
2023-02-04	Enhancement - - For field "deviceReceiptTime" added rebase = true in "event.timestamp".
2023-01-19	Enhancement - - Added support to parser logs by adding following mappings. - Mapped "event.provider" to "principal.user.userid". - Mapped "client.ip" to "principal.ip". - Mapped "client.domain" to "principal.hostname". - Mapped "imperva.abp.request_type" to "principal.labels". - Mapped "imperva.abp.pid" to "principal.process.pid". - Mapped "client.geo.country_iso_code" to "principal.location.country_or_region". - Mapped "server.domain" to "target.hostname". - Mapped "server.geo.name" to "target.location.name". - Mapped "url.path" to "target.process.file.full_path". - Mapped "imperva.abp.customer_request_id" to "target.resource.id". - Mapped "imperva.abp.token_id" to "target.resource.product_object_id". - Mapped "imperva.abp.random_id" to "additional.fields". - Mapped "http.request.method" to "network.http.method". - Mapped "user_agent.original" to "network.http.parsed_user_agent". - Mapped "imperva.abp.headers_referer" to "network.http.referral_url". - Mapped "imperva.abp.zuid" to "additional.fields". - Mapped "imperva.ids.site_name" to "additional.fields". - Mapped "imperva.ids.site_id" to "additional.fields". - Mapped "imperva.ids.account_name" to "metadata.product_event_type". - Mapped "imperva.ids.account_id" to "metadata.product_log_id". - Mapped "imperva.abp.headers_accept_encoding" to "security_result.detection_fields". - Mapped "imperva.abp.headers_accept_language" to "security_result.detection_fields". - Mapped "imperva.abp.headers_connection" to "security_result.detection_fields" - Mapped "imperva.abp.policy_id" to "security_result.detection_fields". - Mapped "imperva.abp.policy_name" to "security_result.detection_fields". - Mapped "imperva.abp.selector_derived_id" to "security_result.detection_fields". - Mapped "imperva.abp.monitor_action" to "security_result.action".
2022-06-28	Enhancement - Mapped vendor.name = Imperva and product.name = Web Application Firewall for all logs Changed "metadata.event_type" where the "src" is "Distributed" from "GENERIC_EVENT" to "USER_UNCATEGORIZED" Changed "metadata.event_type" to "USER_UNCATEGORIZED" to "USER_STATS"
2022-06-20	Modified grok pattern for field "rt". Bug-fix - Improvements to security_result.action. - REQ_PASSED: If the request was routed to the site's web server (security_result.action = 'ALLOW'). - REQ_CACHED_X: If a response was returned from the data center's cache (security_result.action = 'ALLOW'). - REQ_BAD_X: If a protocol or network error occurred (security_result.action = 'FAIL'). - REQ_CHALLENGE_X: If a challenge was returned to the client (security_result.action = 'BLOCK'). - REQ_BLOCKED_X: If the request was blocked (security_result.action = 'BLOCK').
2022-06-14	Bug-fix - Added gsub and modified the kv filter to avoid incorrect mapping of fields 'cs1Label', 'cs2Label', 'cs3Label' mapped to UDM field 'security_result.detection_fields'.
2022-05-26	Bug-fix - Removed key name and colon character from the value of the detection fields.
2022-05-10	Enhancement - Mapped the following fields: - 'cs1', 'cs2', 'cs3', 'cs4', 'cs5', 'fileType', 'filePermission' to 'security_result.detection_fields'. - 'cs7' to 'principal.location.region_latitude'. - 'cs8' to 'principal.location.region_longitude'. - 'cn1', 'cn2' to 'security_result.detection_fields' for CEF format logs. - 'act' to 'security_result.action' and 'security_result.action_details' for CEF format logs. - 'app' to 'network.application_protocol' for CEF format logs. - 'requestClientApplication' to 'network.http.user_agent' for CEF format logs. - 'dvc' to 'about.ip' for CEF format logs.