DHCP Activity

dhcp_activity (4004)

DHCP Activity events report MAC to IP assignment via DHCP from a client or server.

Contents

Attributes

Caption Name Type Is Array Default Description
Action action String The normalized caption of action_id.
Action ID action_id Integer The action taken by a control or other policy-based system leading to an outcome or disposition. Dispositions conform to an action of 1 'Allowed' or 2 'Denied' in most cases. Note that 99 'Other' is not an option. No action would equate to 1 'Allowed'. An unknown action may still correspond to a known disposition. Refer to disposition_id for the outcome of the action.
0
Unknown
1
Allowed
2
Denied
99
Other
Activity ID activity_id Integer The normalized identifier of the activity that triggered the event.
0
Unknown
1
Discover
2
Offer
3
Request
4
Decline
5
Ack
6
Nak
7
Release
8
Inform
9
Expire
99
Other
Activity activity_name String The event activity name, as defined by the activity_id.
Actor actor Actor The actor object describes details about the user/role/process that was the source of the activity.
API Details api API Describes details about a typical API (Application Programming Interface) call.
Application Name app_name String The name of the application associated with the event or object.
MITRE ATT&CK® Details attacks MITRE ATT&CK® An array of MITRE ATT&CK® objects describing the tactics, techniques & sub-techniques identified by a security control or finding.
Authorization Information authorizations Authorization Result Provides details about an authorization, such as authorization outcome, and any associated policies related to the activity/event.
Category category_name String The event category name, as defined by category_uid value.
Category ID category_uid Integer The category unique identifier of the event.
4
Network Activity
Class class_name String The event class name, as defined by class_uid value.
Class ID class_uid Integer The unique identifier of a class. A class describes the attributes available in an event.
4004
DHCP Activity
Cloud cloud Cloud Describes details about the Cloud environment where the event was originally created or logged.
Confidence confidence Integer The confidence of the reported event severity as a percentage: 0%-100%.

Deprecated since 1.1.0: Deprecated in upgrade from ocsf-0.31.1 to qdm-1.1.0
Connection Info connection_info Network Connection Information The network connection information.
Count count Integer 1 The number of times that events in the same logical group occurred during the event Start Time to End Time period.
Data data JSON Additional data that is associated with the event.

Deprecated since 1.1.0: Deprecated in upgrade from ocsf-0.31.1 to qdm-1.1.0
Device device Device An addressable device, computer system or host.
Disposition disposition String The disposition name, normalized to the caption of the disposition_id value. In the case of 'Other', it is defined by the event source.
Disposition ID disposition_id Integer Describes the outcome or action taken by a security control, such as access control checks, malware detections or various types of policy violations.
0
Unknown
1
Allowed
2
Blocked
3
Quarantined
4
Isolated
5
Deleted
6
Dropped
7
Custom Action
8
Approved
9
Restored
10
Exonerated
11
Corrected
12
Partially Corrected
13
Uncorrected
14
Delayed
15
Detected
16
No Action
17
Logged
18
Tagged
19
Alert
20
Count
21
Reset
22
Captcha
23
Challenge
24
Access Revoked
25
Rejected
26
Unauthorized
27
Error
99
Other
Destination Endpoint dst_endpoint Network Endpoint The responder (server) of the DHCP connection.
Duration duration Integer The event duration or aggregate time, the amount of time the event covers from start_time to end_time in milliseconds.
End Time end_time Timestamp The end time of a time period, or the time of the most recent event included in the aggregate event.
Enrichments enrichments Enrichment The additional information from an external data source, which is associated with the event or a finding. For example add location information for the IP address in the DNS answers:

[{"name": "answers.ip", "value": "92.24.47.250", "type": "location", "data": {"city": "Socotra", "continent": "Asia", "coordinates": [-25.4153, 17.0743], "country": "YE", "desc": "Yemen"}}]
Firewall Rule firewall_rule Firewall Rule The firewall rule that triggered the event.
Renewal is_renewal Boolean The indication of whether this is a lease/session renewal event.
Lease Duration lease_dur Integer This represents the length of the DHCP lease in seconds. This is present in DHCP Ack events.
Load Balancer load_balancer Load Balancer The Load Balancer object contains information related to the device that is distributing incoming traffic to specified destinations.
Malware malware Malware A list of Malware objects, describing details about the identified malware.
Message message String The description of the event/finding, as defined by the source.
Metadata metadata Metadata The metadata associated with the event or a finding.
Network Interface network_interface Network Interface The network interface that is associated with the device.

Deprecated since 1.1.0: Deprecated in upgrade from ocsf-0.31.1 to qdm-1.1.0
Observables observables Observable The observables associated with the event or a finding.
Proxy proxy Network Proxy Endpoint The proxy (server) in a network connection.

Deprecated since 1.1.0: Use the proxy_endpoint attribute instead.
Proxy Connection Info proxy_connection_info Network Connection Information The connection information from the proxy server to the remote server.
Proxy Endpoint proxy_endpoint Network Proxy Endpoint The proxy (server) in a network connection.
Proxy HTTP Request proxy_http_request HTTP Request The HTTP Request from the proxy server to the remote server.
Proxy HTTP Response proxy_http_response HTTP Response The HTTP Response from the remote server to the proxy server.
Proxy TLS proxy_tls Transport Layer Security (TLS) The TLS protocol negotiated between the proxy server and the remote server.
Proxy Traffic proxy_traffic Network Traffic The network traffic refers to the amount of data moving across a network, from proxy to remote server at a given point of time.
Raw Data raw_data JSON The event data as received from the event source.
Record ID record_id String Unique idenifier for the event
Relay relay Network Interface The network relay that is associated with the event.
Severity severity String The event/finding severity, normalized to the caption of the severity_id value. In the case of 'Other', it is defined by the source.
Severity ID severity_id Integer

The normalized identifier of the event/finding severity.

The normalized severity is a measurement the effort and expense required to manage and resolve an event or incident. Smaller numerical values represent lower impact events, and larger numerical values represent higher impact events.
0
Unknown
1
Informational
2
Low
3
Medium
4
High
5
Critical
6
Fatal
99
Other
Source Endpoint src_endpoint Network Endpoint The initiator (client) of the DHCP connection.
Start Time start_time Timestamp The start time of a time period, or the time of the least recent event included in the aggregate event.
Status status String The event status, normalized to the caption of the status_id value. In the case of 'Other', it is defined by the event source.
Status Code status_code String The event status code, as reported by the event source.

For example, in a Windows Failed Authentication event, this would be the value of 'Failure Code', e.g. 0x18.
Status Details status_detail String The status details contains additional information about the event/finding outcome.
Status ID status_id Integer The normalized identifier of the event status.
0
Unknown
1
Success
2
Failure
99
Other
Event Time time Timestamp The normalized event occurrence time or the finding creation time.
Timezone Offset timezone_offset Integer The number of minutes that the reported event time is ahead or behind UTC, in the range -1,080 to +1,080.
TLS tls Transport Layer Security (TLS) The Transport Layer Security (TLS) attributes.
Traffic traffic Network Traffic The network traffic refers to the amount of data moving across a network at a given point of time. Intended to be used alongside Network Connection.
Transaction UID transaction_uid String The unique identifier of the transaction. This is typically a random number generated from the client to associate a dhcp request/response pair.
Type Name type_name String The event/finding type name, as defined by the type_uid.
Type ID type_uid Long The event/finding type ID. It identifies the event's semantics and structure. The value is calculated by the logging system as: class_uid * 100 + activity_id.
400400
DHCP Activity: Unknown
400401
DHCP Activity: Discover
400402
DHCP Activity: Offer
400403
DHCP Activity: Request
400404
DHCP Activity: Decline
400405
DHCP Activity: Ack
400406
DHCP Activity: Nak
400407
DHCP Activity: Release
400408
DHCP Activity: Inform
400409
DHCP Activity: Expire
400499
DHCP Activity: Other
Unmapped Data unmapped Unmapped The attributes that are not mapped to the event schema. The names and values of those attributes are specific to the event source.

Context

DHCP Activity

JSON

            
{
  "caption": "DHCP Activity",
  "category": "network",
  "description": "DHCP Activity events report MAC to IP assignment via DHCP from a client or server.",
  "extends": "network",
  "name": "dhcp_activity",
  "profiles": [
    "host"
  ],
  "uid": 4,
  "attributes": {
    "activity_id": {
      "enum": {
        "1": {
          "caption": "Discover",
          "description": "DHCPDISCOVER"
        },
        "2": {
          "caption": "Offer",
          "description": "DHCPOFFER"
        },
        "3": {
          "caption": "Request",
          "description": "DHCPREQUEST"
        },
        "4": {
          "caption": "Decline",
          "description": "DHCPDECLINE"
        },
        "5": {
          "caption": "Ack",
          "description": "DHCPACK: The server accepts the request by sending the client a DHCP Acknowledgment message."
        },
        "6": {
          "caption": "Nak",
          "description": "DHCPNAK"
        },
        "7": {
          "caption": "Release",
          "description": "DHCPRELEASE: A DHCP client sends a DHCPRELEASE packet to the server to release the IP address and cancel any remaining lease."
        },
        "8": {
          "caption": "Inform",
          "description": "DHCPINFORM"
        },
        "9": {
          "caption": "Expire",
          "description": "DHCPEXPIRE: A DHCP lease expired."
        },
        "0": {
          "caption": "Unknown",
          "description": "The event activity is unknown."
        },
        "99": {
          "caption": "Other",
          "description": "The event activity is not mapped. See the <code>activity_name</code> attribute, which contains a data source specific value."
        }
      },
      "requirement": "required",
      "caption": "Activity ID",
      "description": "The normalized identifier of the activity that triggered the event.",
      "sibling": "activity_name",
      "type": "integer_t"
    },
    "dst_endpoint": {
      "description": "The responder (server) of the DHCP connection.",
      "requirement": "recommended",
      "group": "primary",
      "caption": "Destination Endpoint",
      "type": "network_endpoint"
    },
    "is_renewal": {
      "group": "primary",
      "requirement": "recommended",
      "caption": "Renewal",
      "description": "The indication of whether this is a lease/session renewal event.",
      "type": "boolean_t"
    },
    "lease_dur": {
      "group": "primary",
      "requirement": "recommended",
      "caption": "Lease Duration",
      "description": "This represents the length of the DHCP lease in seconds. This is present in DHCP Ack events.",
      "type": "integer_t"
    },
    "src_endpoint": {
      "description": "The initiator (client) of the DHCP connection.",
      "requirement": "recommended",
      "group": "primary",
      "caption": "Source Endpoint",
      "type": "network_endpoint"
    },
    "relay": {
      "group": "primary",
      "requirement": "recommended",
      "caption": "Relay",
      "description": "The network relay that is associated with the event.",
      "type": "network_interface"
    },
    "transaction_uid": {
      "description": "The unique identifier of the transaction. This is typically a random number generated from the client to associate a dhcp request/response pair.",
      "group": "primary",
      "requirement": "recommended",
      "caption": "Transaction UID",
      "type": "string_t"
    },
    "cloud": {
      "requirement": "required",
      "group": "primary",
      "caption": "Cloud",
      "description": "Describes details about the Cloud environment where the event was originally created or logged.",
      "type": "cloud"
    },
    "api": {
      "requirement": "optional",
      "group": "context",
      "caption": "API Details",
      "description": "Describes details about a typical API (Application Programming Interface) call.",
      "type": "api"
    },
    "device": {
      "requirement": "recommended",
      "caption": "Device",
      "description": "An addressable device, computer system or host.",
      "type": "device"
    },
    "actor": {
      "requirement": "optional",
      "caption": "Actor",
      "description": "The actor object describes details about the user/role/process that was the source of the activity.",
      "type": "actor"
    },
    "app_name": {
      "group": "context",
      "requirement": "optional",
      "caption": "Application Name",
      "description": "The name of the application associated with the event or object.",
      "type": "string_t"
    },
    "connection_info": {
      "group": "primary",
      "requirement": "recommended",
      "caption": "Connection Info",
      "description": "The network connection information.",
      "type": "network_connection_info"
    },
    "proxy": {
      "group": "primary",
      "requirement": "recommended",
      "@deprecated": {
        "message": "Use the <code> proxy_endpoint </code> attribute instead.",
        "since": "1.1.0"
      },
      "caption": "Proxy",
      "description": "The proxy (server) in a network connection.",
      "type": "network_proxy"
    },
    "tls": {
      "group": "primary",
      "caption": "TLS",
      "description": "The Transport Layer Security (TLS) attributes.",
      "type": "tls"
    },
    "traffic": {
      "group": "primary",
      "requirement": "recommended",
      "caption": "Traffic",
      "description": "The network traffic refers to the amount of data moving across a network at a given point of time. Intended to be used alongside Network Connection.",
      "type": "network_traffic"
    },
    "action": {
      "caption": "Action",
      "description": "The normalized caption of <code>action_id</code>.",
      "requirement": "optional",
      "type": "string_t"
    },
    "action_id": {
      "caption": "Action ID",
      "description": "The action taken by a control or other policy-based system leading to an outcome or disposition. Dispositions conform to an action of <code>1</code> 'Allowed' or <code>2</code> 'Denied' in most cases. Note that <code>99</code> 'Other' is not an option. No action would equate to <code>1</code> 'Allowed'. An unknown action may still correspond to a known disposition. Refer to <code>disposition_id</code> for the outcome of the action.",
      "enum": {
        "0": {
          "caption": "Unknown",
          "description": "The action was unknown. The <code>disposition_id</code> attribute may still be set to a non-unknown value, for example 'Count', 'Uncorrected', 'Isolated', 'Quarantined' or 'Exonerated'."
        },
        "1": {
          "caption": "Allowed",
          "description": "The activity was allowed. The <code>disposition_id</code> attribute should be set to a value that conforms to this action, for example 'Allowed', 'Approved', 'Delayed', 'No Action', 'Count' etc."
        },
        "2": {
          "caption": "Denied",
          "description": "The attempted activity was denied. The <code>disposition_id</code> attribute should be set to a value that conforms to this action, for example 'Blocked', 'Rejected', 'Quarantined', 'Isolated', 'Dropped', 'Access Revoked, etc."
        },
        "99": {
          "caption": "Other",
          "description": "The action was not mapped. See the <code>action</code> attribute, which contains a data source specific value."
        }
      },
      "requirement": "required",
      "type": "integer_t",
      "sibling": "action"
    },
    "attacks": {
      "requirement": "optional",
      "caption": "MITRE ATT&CK\u00ae Details",
      "description": "An array of <a target='_blank' href='https://attack.mitre.org'>MITRE ATT&CK\u00ae</a> objects describing the tactics, techniques & sub-techniques identified by a security control or finding.",
      "is_array": true,
      "type": "attack"
    },
    "authorizations": {
      "requirement": "optional",
      "caption": "Authorization Information",
      "description": "Provides details about an authorization, such as authorization outcome, and any associated policies related to the activity/event.",
      "is_array": true,
      "type": "authorization"
    },
    "disposition": {
      "requirement": "optional",
      "caption": "Disposition",
      "description": "The disposition name, normalized to the caption of the disposition_id value. In the case of 'Other', it is defined by the event source.",
      "type": "string_t"
    },
    "disposition_id": {
      "requirement": "recommended",
      "enum": {
        "99": {
          "caption": "Other",
          "description": "The disposition is not listed. The <code>disposition</code> attribute should be populated with a source specific caption."
        },
        "0": {
          "caption": "Unknown",
          "description": "The disposition was not known."
        },
        "1": {
          "caption": "Allowed",
          "description": "Granted access or allowed the action to the protected resource."
        },
        "2": {
          "caption": "Blocked",
          "description": "Denied access or blocked the action to the protected resource."
        },
        "3": {
          "caption": "Quarantined",
          "description": "A suspicious file or other content was moved to a benign location."
        },
        "4": {
          "caption": "Isolated",
          "description": "A session was isolated on the network or within a browser."
        },
        "5": {
          "caption": "Deleted",
          "description": "A file or other content was deleted."
        },
        "6": {
          "caption": "Dropped",
          "description": "The request was detected as a threat and resulted in the connection being dropped."
        },
        "7": {
          "caption": "Custom Action",
          "description": "A custom action was executed such as running of a command script. Use the <code>message</code> attribute of the base class for details."
        },
        "8": {
          "caption": "Approved",
          "description": "A request or submission was approved.  For example, when a form was properly filled out and submitted. This is distinct from <code>1</code> 'Allowed'."
        },
        "9": {
          "caption": "Restored",
          "description": "A quarantined file or other content was restored to its original location."
        },
        "10": {
          "caption": "Exonerated",
          "description": "A suspicious or risky entity was deemed to no longer be suspicious (re-scored)."
        },
        "11": {
          "caption": "Corrected",
          "description": "A corrupt file or configuration was corrected."
        },
        "12": {
          "caption": "Partially Corrected",
          "description": "A corrupt file or configuration was partially corrected."
        },
        "13": {
          "caption": "Uncorrected",
          "description": "A corrupt file or configuration was not corrected."
        },
        "14": {
          "caption": "Delayed",
          "description": "An operation was delayed, for example if a restart was required to finish the operation."
        },
        "15": {
          "caption": "Detected",
          "description": "Suspicious activity or a policy violation was detected without further action."
        },
        "16": {
          "caption": "No Action",
          "description": "The outcome of an operation had no action taken."
        },
        "17": {
          "caption": "Logged",
          "description": "The operation or action was logged without further action."
        },
        "18": {
          "caption": "Tagged",
          "description": "A file or other entity was marked with extended attributes."
        },
        "19": {
          "caption": "Alert",
          "description": "The request or activity was detected as a threat and resulted in a notification but request was not blocked."
        },
        "20": {
          "caption": "Count",
          "description": "Counted the request or activity but did not determine whether to allow it or block it."
        },
        "21": {
          "caption": "Reset",
          "description": "The request was detected as a threat and resulted in the connection being reset."
        },
        "22": {
          "caption": "Captcha",
          "description": "Required the end user to solve a CAPTCHA puzzle to prove that a human being is sending the request."
        },
        "23": {
          "caption": "Challenge",
          "description": "Ran a silent challenge that required the client session to verify that it's a browser, and not a bot."
        },
        "24": {
          "caption": "Access Revoked",
          "description": "The requestor's access has been revoked due to security policy enforcements. Note: use the <code>Host</code> profile if the <code>User</code> or <code>Actor</code> requestor is not present in the event class."
        },
        "25": {
          "caption": "Rejected",
          "description": "A request or submission was rejected.  For example, when a form was improperly filled out and submitted. This is distinct from <code>2</code> 'Blocked'."
        },
        "26": {
          "caption": "Unauthorized",
          "description": "An attempt to access a resource was denied due to an authorization check that failed. This is a more specific disposition than <code>2</code> 'Blocked' and can be complemented with the <code>authorizations</code> attribute for more detail."
        },
        "27": {
          "caption": "Error",
          "description": "An error occurred during the processing of the activity or request. Use the <code>message</code> attribute of the base class for details."
        }
      },
      "caption": "Disposition ID",
      "description": "Describes the outcome or action taken by a security control, such as access control checks, malware detections or various types of policy violations.",
      "sibling": "disposition",
      "type": "integer_t"
    },
    "firewall_rule": {
      "requirement": "optional",
      "caption": "Firewall Rule",
      "description": "The firewall rule that triggered the event.",
      "type": "firewall_rule"
    },
    "malware": {
      "requirement": "optional",
      "caption": "Malware",
      "description": "A list of Malware objects, describing details about the identified malware.",
      "is_array": true,
      "type": "malware"
    },
    "load_balancer": {
      "requirement": "recommended",
      "caption": "Load Balancer",
      "description": "The Load Balancer object contains information related to the device that is distributing incoming traffic to specified destinations.",
      "type": "load_balancer"
    },
    "proxy_endpoint": {
      "description": "The proxy (server) in a network connection.",
      "requirement": "optional",
      "caption": "Proxy Endpoint",
      "type": "network_proxy"
    },
    "proxy_connection_info": {
      "description": "The connection information from the proxy server to the remote server.",
      "requirement": "recommended",
      "caption": "Proxy Connection Info",
      "type": "network_connection_info"
    },
    "proxy_http_request": {
      "description": "The HTTP Request from the proxy server to the remote server.",
      "requirement": "optional",
      "caption": "Proxy HTTP Request",
      "type": "http_request"
    },
    "proxy_http_response": {
      "description": "The HTTP Response from the remote server to the proxy server.",
      "requirement": "optional",
      "caption": "Proxy HTTP Response",
      "type": "http_response"
    },
    "proxy_traffic": {
      "description": "The network traffic refers to the amount of data moving across a network, from proxy to remote server at a given point of time.",
      "requirement": "recommended",
      "caption": "Proxy Traffic",
      "type": "network_traffic"
    },
    "proxy_tls": {
      "description": "The TLS protocol negotiated between the proxy server and the remote server.",
      "requirement": "recommended",
      "caption": "Proxy TLS",
      "type": "tls"
    },
    "enrichments": {
      "group": "context",
      "requirement": "optional",
      "caption": "Enrichments",
      "description": "The additional information from an external data source, which is associated with the event or a finding. For example add location information for the IP address in the DNS answers:</p><code>[{\"name\": \"answers.ip\", \"value\": \"92.24.47.250\", \"type\": \"location\", \"data\": {\"city\": \"Socotra\", \"continent\": \"Asia\", \"coordinates\": [-25.4153, 17.0743], \"country\": \"YE\", \"desc\": \"Yemen\"}}]</code>",
      "is_array": true,
      "type": "enrichment"
    },
    "message": {
      "group": "primary",
      "requirement": "recommended",
      "caption": "Message",
      "description": "The description of the event/finding, as defined by the source.",
      "type": "string_t"
    },
    "metadata": {
      "group": "context",
      "requirement": "required",
      "caption": "Metadata",
      "description": "The metadata associated with the event or a finding.",
      "type": "metadata"
    },
    "observables": {
      "group": "primary",
      "requirement": "recommended",
      "caption": "Observables",
      "description": "The observables associated with the event or a finding.",
      "is_array": true,
      "type": "observable"
    },
    "raw_data": {
      "group": "context",
      "requirement": "optional",
      "caption": "Raw Data",
      "description": "The event data as received from the event source.",
      "type": "json_t"
    },
    "severity": {
      "group": "classification",
      "requirement": "optional",
      "caption": "Severity",
      "description": "The event/finding severity, normalized to the caption of the severity_id value. In the case of 'Other', it is defined by the source.",
      "type": "string_t"
    },
    "severity_id": {
      "group": "classification",
      "requirement": "required",
      "caption": "Severity ID",
      "description": "<p>The normalized identifier of the event/finding severity.</p>The normalized severity is a measurement the effort and expense required to manage and resolve an event or incident. Smaller numerical values represent lower impact events, and larger numerical values represent higher impact events.",
      "enum": {
        "99": {
          "caption": "Other",
          "description": "The event/finding severity is not mapped. See the <code>severity</code> attribute, which contains a data source specific value."
        },
        "0": {
          "caption": "Unknown",
          "description": "The event severity is not known."
        },
        "1": {
          "caption": "Informational",
          "description": "Informational message. No action required."
        },
        "2": {
          "caption": "Low",
          "description": "The user decides if action is needed."
        },
        "3": {
          "caption": "Medium",
          "description": "Action is required but the situation is not serious at this time."
        },
        "4": {
          "caption": "High",
          "description": "Action is required immediately."
        },
        "5": {
          "caption": "Critical",
          "description": "Action is required immediately and the scope is broad."
        },
        "6": {
          "caption": "Fatal",
          "description": "An error occurred but it is too late to take remedial action."
        }
      },
      "sibling": "severity",
      "type": "integer_t"
    },
    "status": {
      "group": "primary",
      "requirement": "recommended",
      "caption": "Status",
      "description": "The event status, normalized to the caption of the status_id value. In the case of 'Other', it is defined by the event source.",
      "type": "string_t"
    },
    "status_code": {
      "group": "primary",
      "requirement": "recommended",
      "caption": "Status Code",
      "description": "The event status code, as reported by the event source.<br /><br />For example, in a Windows Failed Authentication event, this would be the value of 'Failure Code', e.g. 0x18.",
      "type": "string_t"
    },
    "status_detail": {
      "group": "primary",
      "requirement": "recommended",
      "caption": "Status Details",
      "description": "The status details contains additional information about the event/finding outcome.",
      "type": "string_t"
    },
    "status_id": {
      "group": "primary",
      "requirement": "recommended",
      "caption": "Status ID",
      "description": "The normalized identifier of the event status.",
      "enum": {
        "99": {
          "caption": "Other",
          "description": "The event status is not mapped. See the <code>status</code> attribute, which contains a data source specific value."
        },
        "0": {
          "caption": "Unknown",
          "description": "The status is unknown."
        },
        "1": {
          "caption": "Success"
        },
        "2": {
          "caption": "Failure"
        }
      },
      "sibling": "status",
      "type": "integer_t"
    },
    "unmapped": {
      "group": "context",
      "requirement": "optional",
      "caption": "Unmapped Data",
      "description": "The attributes that are not mapped to the event schema. The names and values of those attributes are specific to the event source.",
      "type": "unmapped",
      "is_array": true
    },
    "activity_name": {
      "requirement": "optional",
      "caption": "Activity",
      "description": "The event activity name, as defined by the activity_id.",
      "type": "string_t"
    },
    "category_name": {
      "requirement": "optional",
      "caption": "Category",
      "description": "The event category name, as defined by category_uid value.",
      "type": "string_t"
    },
    "category_uid": {
      "enum": {
        "4": {
          "caption": "Network Activity",
          "description": "Network Activity events."
        }
      },
      "requirement": "required",
      "caption": "Category ID",
      "description": "The category unique identifier of the event.",
      "sibling": "category_name",
      "type": "integer_t"
    },
    "class_name": {
      "requirement": "optional",
      "caption": "Class",
      "description": "The event class name, as defined by class_uid value.",
      "type": "string_t"
    },
    "class_uid": {
      "enum": {
        "4004": {
          "caption": "DHCP Activity",
          "description": "DHCP Activity events report MAC to IP assignment via DHCP from a client or server."
        }
      },
      "requirement": "required",
      "caption": "Class ID",
      "description": "The unique identifier of a class. A class describes the attributes available in an event.",
      "sibling": "class_name",
      "type": "integer_t"
    },
    "type_name": {
      "requirement": "optional",
      "caption": "Type Name",
      "description": "The event/finding type name, as defined by the type_uid.",
      "type": "string_t"
    },
    "type_uid": {
      "requirement": "required",
      "caption": "Type ID",
      "description": "The event/finding type ID. It identifies the event's semantics and structure. The value is calculated by the logging system as: <code>class_uid * 100 + activity_id</code>.",
      "sibling": "type_name",
      "type": "long_t",
      "enum": {
        "400401": {
          "caption": "DHCP Activity: Discover"
        },
        "400402": {
          "caption": "DHCP Activity: Offer"
        },
        "400403": {
          "caption": "DHCP Activity: Request"
        },
        "400404": {
          "caption": "DHCP Activity: Decline"
        },
        "400405": {
          "caption": "DHCP Activity: Ack"
        },
        "400406": {
          "caption": "DHCP Activity: Nak"
        },
        "400407": {
          "caption": "DHCP Activity: Release"
        },
        "400408": {
          "caption": "DHCP Activity: Inform"
        },
        "400409": {
          "caption": "DHCP Activity: Expire"
        },
        "400400": {
          "caption": "DHCP Activity: Unknown"
        },
        "400499": {
          "caption": "DHCP Activity: Other"
        }
      }
    },
    "count": {
      "requirement": "optional",
      "caption": "Count",
      "description": "The number of times that events in the same logical group occurred during the event <strong>Start Time</strong> to <strong>End Time</strong> period.",
      "type": "integer_t",
      "default": 1
    },
    "duration": {
      "requirement": "optional",
      "caption": "Duration",
      "description": "The event duration or aggregate time, the amount of time the event covers from <code>start_time</code> to <code>end_time</code> in milliseconds.",
      "type": "integer_t"
    },
    "end_time": {
      "description": "The end time of a time period, or the time of the most recent event included in the aggregate event.",
      "requirement": "optional",
      "caption": "End Time",
      "type": "timestamp_t"
    },
    "start_time": {
      "description": "The start time of a time period, or the time of the least recent event included in the aggregate event.",
      "requirement": "optional",
      "caption": "Start Time",
      "type": "timestamp_t"
    },
    "time": {
      "requirement": "required",
      "caption": "Event Time",
      "description": "The normalized event occurrence time or the finding creation time.",
      "type": "timestamp_t"
    },
    "timezone_offset": {
      "requirement": "recommended",
      "caption": "Timezone Offset",
      "description": "The number of minutes that the reported event <code>time</code> is ahead or behind UTC, in the range -1,080 to +1,080.",
      "type": "integer_t"
    },
    "data": {
      "description": "Additional data that is associated with the event.",
      "requirement": "optional",
      "caption": "Data",
      "type": "json_t",
      "@deprecated": {
        "since": "1.1.0",
        "message": "Deprecated in upgrade from ocsf-0.31.1 to qdm-1.1.0"
      }
    },
    "confidence": {
      "group": "classification",
      "requirement": "optional",
      "caption": "Confidence",
      "description": "The confidence of the reported event severity as a percentage: 0%-100%.",
      "type": "integer_t",
      "@deprecated": {
        "since": "1.1.0",
        "message": "Deprecated in upgrade from ocsf-0.31.1 to qdm-1.1.0"
      }
    },
    "record_id": {
      "description": "Unique idenifier for the event",
      "group": "primary",
      "requirement": "required",
      "caption": "Record ID",
      "type": "string_t"
    },
    "network_interface": {
      "group": "primary",
      "requirement": "required",
      "caption": "Network Interface",
      "description": "The network interface that is associated with the device.",
      "type": "network_interface",
      "@deprecated": {
        "since": "1.1.0",
        "message": "Deprecated in upgrade from ocsf-0.31.1 to qdm-1.1.0"
      }
    }
  }
}