Change log for LINUX_SYSMON

Date	Changes
2026-02-18	Enhancement: - Added a conditional check before already existing mapping of `SourceProcessGUID` to `event.idm.read_only_udm.principal.process.product_specific_process_id`. - Added a conditional check before already existing mapping of `TargetProcessGUID` to `event.idm.read_only_udm.target.process.product_specific_process_id`. - `event.idm.read_only_udm.additional.fields`: Newly mapped `SourceThreadId` (key: `source_thread_id`) raw log field with `event.idm.read_only_udm.additional.fields` UDM field. - `event.idm.read_only_udm.principal.user.userid`: Newly mapped `SourceUser` raw log field with `event.idm.read_only_udm.principal.user.userid` UDM field. - `event.idm.read_only_udm.target.user.userid`: Newly mapped `TargetUser` raw log field with `event.idm.read_only_udm.target.user.userid` UDM field. - `event.idm.read_only_udm.security_result.detection_fields`: Newly mapped `SecurityUserId` (key: `security_user_id`), `Opcode` (key: `opcode`) raw log fields with `event.idm.read_only_udm.security_result.detection_fields` UDM field. - Due to the changes mentioned above, some failing logs are fixed and the following UDM fields are now being mapped correctly: - `event.idm.read_only_udm.intermediary[].hostname` - `event.idm.read_only_udm.metadata.event_timestamp.nanos` - `event.idm.read_only_udm.metadata.event_timestamp.seconds` - `event.idm.read_only_udm.metadata.event_type` - `event.idm.read_only_udm.metadata.log_type` - `event.idm.read_only_udm.metadata.product_event_type` - `event.idm.read_only_udm.metadata.product_log_id` - `event.idm.read_only_udm.metadata.product_name` - `event.idm.read_only_udm.metadata.vendor_name` - `event.idm.read_only_udm.network.direction` - `event.idm.read_only_udm.network.ip_protocol` - `event.idm.read_only_udm.principal.asset.hostname` - `event.idm.read_only_udm.principal.asset.ip[]` - `event.idm.read_only_udm.principal.hostname` - `event.idm.read_only_udm.principal.ip[]` - `event.idm.read_only_udm.principal.network.session_id` - `event.idm.read_only_udm.principal.port` - `event.idm.read_only_udm.principal.process.command_line` - `event.idm.read_only_udm.principal.process.file.full_path` - `event.idm.read_only_udm.principal.process.pid` - `event.idm.read_only_udm.security_result[].action[]` - `event.idm.read_only_udm.security_result[].rule_name` - `event.idm.read_only_udm.security_result[].severity` - `event.idm.read_only_udm.target.asset.ip[]` - `event.idm.read_only_udm.target.file.full_path` - `event.idm.read_only_udm.target.ip[]` - `event.idm.read_only_udm.target.port` - `event.idm.read_only_udm.target.process.command_line` - `event.idm.read_only_udm.target.process.file.full_path` - `event.idm.read_only_udm.target.process.file.sha256` - `event.idm.read_only_udm.target.process.pid` - `event.idm.read_only_udm.target.resource.attribute.labels[].key` - `event.idm.read_only_udm.target.resource.attribute.labels[].value` - `event.idm.read_only_udm.target.resource.name` - `event.idm.read_only_udm.target.resource.resource_subtype`
2025-09-25	Enhancement: - Added a grok pattern to parse new log formats. - `event.idm.read_only_udm.additional.fields`: Newly mapped `component`, `source_file` raw log field with `event.idm.read_only_udm.additional.fields` UDM field. - `event.idm.read_only_udm.principal.application`: Newly mapped `process_name` raw log field with `event.idm.read_only_udm.principal.application` UDM field. - `event.idm.read_only_udm.security_result.description: Newly mapped `desc` raw log field with `event.idm.read_only_udm.security_result.description` UDM field. - `event.idm.read_only_udm.security_result.severity_details`: Newly mapped `log_level` raw log field with `event.idm.read_only_udm.security_result.severity_details` UDM field.
2025-07-29	Enhancement: - Modified the grok pattern to fetch timestamp and Added date filter to support new format of timestamps. - Added a Grok pattern to support new pattern of logs. - Modified else condition to filter null values in `Category` raw log field. - Added KV filter to support new format of logs. - event.idm.read_only_udm.additional.fields: Newly mapped `logname`,`tty`,`uid`,`euid` raw log fields with `event.idm.read_only_udm.additional.fields` UDM field. - event.idm.read_only_udm.target.user.userid: Newly mapped `user` raw log fields with `event.idm.read_only_udm.target.user.userid` UDM field. - event.idm.read_only_udm.security_result.summary: Newly mapped `summary` raw log fields with `event.idm.read_only_udm.security_result.summary` UDM field.
2025-07-02	Enhancement: - event.idm.read_only_udm.intermediary.hostname: Newly mapped `Computer` raw log field with `event.idm.read_only_udm.intermediary.hostname` UDM field. - event.idm.read_only_udm.additional.fields: Newly mapped `Channel`, `ThreadID`, `SystemTime`, `Keywords`, `Task`, `Version`, `ProviderGuid`, `SourceName` raw log fields with `event.idm.read_only_udm.additional.fields` UDM field.
2024-10-22	Enhancement: - Added support for the new pattern of syslog logs.
2024-06-17	Enhancement: - Added support for the new pattern of JSON logs.
2024-01-25	Enhancement : - Removed extra escape characters from the "message" to avoid 'xml' filter failure. - Changed mapping for "UserID" from "principal.user.windows_sid" to "principal.user.userid".
2023-11-09	Enhancement : - Mapped "User" to "target.user.userid". - Mapped "ParentUser" to "principal.user.userid". - Mapped "ProcessId" to "target.process.pid". - Mapped "FileVersion" to "principal.software.version". - Mapped "Product" to "principal.software.name". - Mapped "Company" to "principal.software.vendor_name". - Mapped "LogonId" to "principal.network.session_id". - Mapped "OriginalFileName", "CurrentDirectory", "LogonGuid", "TerminalSessionId", "IntegrityLevel" to "additional.fields".
2022-07-12	Enhancement : - Added null check to EventID field prior mapping. - Mapped insertId to metadata.product_log_id. - Mapped logName to target_process_file. - Mapped resource.type to target.resource.type. - Mapped resource.labels.project_id to target.resource.product_object_id. - Mapped resource.labels.instance_id to target.resource.id. - Mapped refer_url to network.http.referral_url.
2022-05-10	Initial creation of the LINUX_SYSMON Chronicle parser, based upon WINDOWS_SYSMON - Supports events IDs 1, 3, 5, 9, 11, 16, 23. - Uses the Chronicle Forwarder Regex Filter capabilities with an allow filter of 'sysmon' to exclude syslog logs.