This is an optional step of the Installation Wizard. On the Event enrichment tab of the Installation Wizard, you can specify which data from which sources should be added to events processed by the collector. Events can be enriched with data obtained using enrichment rules or LDAP.
Rule-based enrichment
There can be more than one enrichment rule. You can add them by clicking the Add enrichment button and can remove them by clicking the button. You can use existing enrichment rules or create rules directly in the Installation Wizard.
To add an existing enrichment rule to a set of resources:
This opens the enrichment rules settings block.
The enrichment rule is added to the set of resources for the collector.
To create a new enrichment rule in a set of resources:
This opens the enrichment rules settings block.
This type of enrichment is used when a constant needs to be added to an event field. Available enrichment type settings are listed in the table below.
Available enrichment type settings
Setting |
Description |
---|---|
Constant |
The value to be added to the event field. Maximum length of the value: 255 Unicode characters. If you leave this field blank, the existing event field value is removed. |
Target field |
The KUMA event field that you want to populate with the data. |
If you are using the event enrichment functions for extended schema fields of "String", "Number", or "Float" type with a constant, the constant is added to the field.
If you are using the event enrichment functions for extended schema fields of "Array of strings", "Array of numbers", or "Array of floats" type with a constant, the constant is added to the elements of the array.
This type of enrichment is used if you need to add a value from the dictionary of the Dictionary type. Available enrichment type settings are listed in the table below.
Available enrichment type settings
Setting |
Description |
---|---|
Dictionary name |
The dictionary from which the values are to be taken. |
Key fields |
Event fields whose values are to be used for selecting a dictionary entry. To add an event field, click Add field. You can add multiple event fields. |
If you are using event enrichment with the dictionary type selected as the Source kind setting, and an array field is specified in the Key enrichment fields setting, when an array is passed as the dictionary key, the array is serialized into a string in accordance with the rules of serializing a single value in the TSV format.
Example: The Key fields setting of the enrichment uses the SA.StringArrayOne
extended schema field. The SA.StringArrayOne
extended schema field contains the values "a"
, "b"
, "c"
. The following values are passed to the dictionary as the key: ['a','b','c']
.
If the Key enrichment fields setting uses an array extended schema field and a regular event schema field, the field values are separated by the "|
" character when the dictionary is queried.
Example: The Key enrichment fields setting uses the SA.StringArrayOne
extended schema field and the Code
string field. The SA.StringArrayOne
extended schema field contains the values "a"
, "b"
, "c"
, and the Code
string field contains the myCode
sequence of characters. The following values are passed to the dictionary as the key: ['a','b','c']|myCode
.
This type of enrichment is used when you need to write a value from another event field to the current event field. Settings of this type of enrichment:
Conversions are modifications that are applied to a value before it is written to the event field. You can select one of the following conversion types from the drop-down list:
Micromon
value is applied to Microsoft-Windows-Sysmon
, the new value is soft-Windows-Sys
.When converting a corrupted string or if conversion error occur, corrupted data may be written to the event field.
During event enrichment, if the length of the encoded string exceeds the size of the field of the normalized event, the string is truncated and is not decoded.
If the length of the decoded string exceeds the size of the event field into which the decoded value is to be written, such a string is truncated to fit the size of the event field.
Conversions when using the extended event schema
Whether or not a conversion can be used depends on the type of extended event schema field being used:
This type of enrichment is used when you need to write the result of processing Go templates into the event field. We recommend matching the value and the size of the field. Available enrichment type settings are listed in the table below.
Available enrichment type settings
Setting |
Description |
---|---|
Template |
The Go template. Event field names are passed in the |
Target field |
The KUMA event field that you want to populate with the data. |
If you are using enrichment of events that have template selected as the Source kind, and in which the target field has the "String" type, and the source field is an extended event schema field containing an array of strings, you can use one of the following examples for the template:
{{.SA.StringArrayOne}}
{{- range $index, $element := . SA.StringArrayOne -}}
{{- if $index}}, {{end}}"{{$element}}"{{- end -}}
To convert the data in an array field in a template into the TSV format, use the toString
function, for example:
template {{toString.SA.StringArray}}
This type of enrichment is used to send requests to a private network DNS server to convert IP addresses into domain names or vice versa. IP addresses are converted to DNS names only for private addresses: 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, 100.64.0.0/10.
Available settings:
1,000
.1
.60
.This type of enrichment is deprecated, we recommend using cybertrace-http instead.
This type of enrichment is used to add information from CyberTrace data streams to event fields.
Available settings:
1,000
.30
.Available types of CyberTrace indicators:
In the mapping table, you must provide at least one string. You can use the Add row button to add a string, and can use the button to remove a string.
This is a new streaming event enrichment type in CyberTrace that allows you to send a large number of events with a single request to the CyberTrace API. Recommended for systems with a lot of events. Cybertrace-http outperforms the previous 'cybertrace' type, which is still available in KUMA for backward compatibility.
Limitations:
Available settings:
30
.This type of enrichment is used in collectors and correlators to assign a specific timezone to an event. Timezone information may be useful when searching for events that occurred at unusual times, such as nighttime.
When this type of enrichment is selected, the required timezone must be selected from the Timezone drop-down list.
Make sure that the required time zone is set on the server hosting the enrichment-utilizing service. For example, you can do this by using the timedatectl list-timezones
command, which shows all time zones that are set on the server. For more details on setting time zones, please refer to your operating system documentation.
When an event is enriched, the time offset of the selected timezone relative to Coordinated Universal Time (UTC) is written to the DeviceTimeZone event field in the +-hh:mm
format. For example, if you select the Asia/Yekaterinburg timezone, the value +05:00
will be written to the DeviceTimeZone field. If the enriched event already has a value in the DeviceTimeZone field, it will be overwritten.
By default, if the timezone is not specified in the event being processed and enrichment rules by timezone are not configured, the event is assigned the timezone of the server hosting the service (collector or correlator) that processes the event. If the server time is changed, the service must be restarted.
Permissible time formats when enriching the DeviceTimeZone field
When processing incoming raw events in the collector, the following time formats can be automatically converted to the +-hh:mm format:
Time format in a processed event |
Example |
+-hh:mm |
-07:00 |
+-hhmm |
-0700 |
+-hh |
-07 |
If the date format in the DeviceTimeZone
field differs from the formats listed above, the collector server timezone is written to the field when an event is enriched with timezone information. You can create custom normalization rules for non-standard time formats.
This type of enrichment is used to add IP address geographic data to event fields. Learn more about linking IP addresses to geographic data.
When this type is selected, in the Mapping geographic data to event fields settings block, you must specify from which event field the IP address will be read, select the required attributes of geographic data, and define the event fields in which geographic data will be written:
You can use the Add event field with IP address button to specify multiple event fields with IP addresses that require geographic data enrichment. You can delete event fields added in this way by clicking the Delete event field with IP address button.
When the SourceAddress
, DestinationAddress
, and DeviceAddress
event fields are selected, the Apply default mapping button becomes available. You can use this button to add preconfigured mapping pairs of geographic data attributes and event fields.
You can use the Add geodata attribute button to add field pairs for Geodata attribute – Event field to write to. You can also configure different types of geographic data for one IP address to be written to different event fields. To delete a field pair, click .
You can write identical geographic data attributes to different event fields. If you configure multiple geographic data attributes to be written to the same event field, the event will be enriched with the last mapping in the sequence.
Creating a filter in resources
To create a filter:
The value to be checked is converted to binary and processed right to left. Chars are checked whose index is specified as a constant or a list.
If the value being checked is a string, then an attempt is made to convert it to integer and process it in the way described above. If the string cannot be converted to a number, the filter returns False
.
If you do not specify the ID and severity of the vulnerability, the filter is triggered if the asset in the event being checked has any vulnerability.
You can add multiple conditions or a group of conditions.
The new enrichment rule was added to the set of resources for the collector.
LDAP enrichment
To enable enrichment using LDAP:
This opens the settings block for LDAP enrichment.
Before configuring event enrichment using custom attributes, make sure that custom attributes are configured in AD.
To enrich events with accounts using custom attributes:
Standard imported attributes from AD cannot be added as custom attributes. For example, if you add the standard accountExpires
attribute as a custom attribute, KUMA returns an error when saving the connection settings.
The following account attributes can be requested from Active Directory:
accountExpires
badPasswordTime
cn
co
company
department
description
displayName
distinguishedName
division
employeeID
givenName
l
lastLogon
lastLogonTimestamp
Mail
mailNickname
managedObjects
manager
memberOf
(this attribute can be used for search during correlation)mobile
name
objectCategory
objectGUID
(this attribute always requested from Active Directory even if a user doesn't specify it)objectSID
physicalDeliveryOfficeName
pwdLastSet
sAMAccountName
sAMAccountType
sn
streetAddress
telephoneNumber
title
userAccountControl
UserPrincipalName
whenChanged
whenCreated
After you add custom attributes in the LDAP connection settings, the LDAP attribute to receive drop-down list in the collector automatically includes the new attributes. Custom attributes are identified by a question mark next to the attribute name. If you added the same attribute for multiple domains, the attribute is listed only once in the drop-down list. You can view the domains by moving your cursor over the question mark. Domain names are displayed as links. If you click a link, the domain is automatically added to LDAP accounts mapping if it was not previously added.
If you deleted a custom attribute in the LDAP connection settings, manually delete the row containing the attribute from the mapping table in the collector. Account attribute information in KUMA is updated each time you import accounts.
After the collector is restarted, KUMA begins enriching events with accounts.
You can use the Add row button to add a string to the table, and can use the button to remove a string. You can use the Apply default mapping button to fill the mapping table with standard values.
Event enrichment rules for data received from LDAP were added to the group of resources for the collector.
If you add an enrichment to an existing collector using LDAP or change the enrichment settings, you must stop and restart the service.
Proceed to the next step of the Installation Wizard.
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