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SMB Activity (4006)

Server Message Block (SMB) Protocol Activity events report client/server connections sharing resources within the network.

  • Category: Network Activity
  • Extends: network_activity
  • UID: 4006

Attributes

Section titled “Attributes”

Classification

Section titled “Classification”

activity_id

  • Type: integer_t
  • Requirement: required
  • Values:
    • 0 - Unknown: The event activity is unknown.
    • 1 - File Supersede: The event pertains to file superseded activity (overwritten if it exists and created if not).
    • 2 - File Open: The event pertains to file open activity (the file is opened if it exists and fails to open if it doesn’t).
    • 3 - File Create: The event pertains to file creation activity (a file is created if it does not exist and fails if it does).
    • 4 - File Open If: The event pertains to file open activity (the file is opened if it exists and is created if it doesn’t).
    • 5 - File Overwrite: The event pertains to file overwrite activity (the file is opened in a truncated form if it exists and fails if it doesn’t).
    • 6 - File Overwrite If: The event pertains to file overwrite activity (the file is opened in a truncated form if it exists and created otherwise)
    • 99 - Other: The event activity is not mapped.

The normalized identifier of the activity that triggered the event.

category_uid

  • Type: integer_t
  • Requirement: required
  • Values:
    • 4 - Network Activity: Network Activity events.

The category unique identifier of the event.

class_uid

  • Type: integer_t
  • Requirement: required
  • Values:
    • 4006 - SMB Activity: Server Message Block (SMB) Protocol Activity events report client/server connections sharing resources within the network.

The unique identifier of a class. A Class describes the attributes available in an event.

severity_id

  • Type: integer_t
  • Requirement: required
  • Values:
    • 0 - Unknown: The event severity is not known.
    • 1 - Informational: Informational message. No action required.
    • 2 - Low: The user decides if action is needed.
    • 3 - Medium: Action is required but the situation is not serious at this time.
    • 4 - High: Action is required immediately.
    • 5 - Critical: Action is required immediately and the scope is broad.
    • 6 - Fatal: An error occurred but it is too late to take remedial action.
    • 99 - Other: The event severity is not mapped. See the severity attribute, which contains a data source specific value.

The normalized identifier of the event 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.

type_uid

  • Type: integer_t
  • Requirement: required
  • Values:
    • 400600 - SMB Activity: Unknown
    • 400601 - SMB Activity: File Supersede: The event pertains to file superseded activity (overwritten if it exists and created if not).
    • 400602 - SMB Activity: File Open: The event pertains to file open activity (the file is opened if it exists and fails to open if it doesn’t).
    • 400603 - SMB Activity: File Create: The event pertains to file creation activity (a file is created if it does not exist and fails if it does).
    • 400604 - SMB Activity: File Open If: The event pertains to file open activity (the file is opened if it exists and is created if it doesn’t).
    • 400605 - SMB Activity: File Overwrite: The event pertains to file overwrite activity (the file is opened in a truncated form if it exists and fails if it doesn’t).
    • 400606 - SMB Activity: File Overwrite If: The event pertains to file overwrite activity (the file is opened in a truncated form if it exists and created otherwise)
    • 400699 - SMB Activity: Other

The event type ID. It identifies the event’s semantics and structure. The value is calculated by the logging system as: class_uid * 100 + activity_id.

activity_name

  • Type: string_t
  • Requirement: optional

The event activity name, as defined by the activity_id.

category_name

  • Type: string_t
  • Requirement: optional

The event category name, as defined by category_uid value: Network Activity.

class_name

  • Type: string_t
  • Requirement: optional

The event class name, as defined by class_uid value: SMB Activity.

severity

  • Type: string_t
  • Requirement: optional

The event severity, normalized to the caption of the severity_id value. In the case of ‘Other’, it is defined by the event source.

type_name

  • Type: string_t
  • Requirement: optional

The event type name, as defined by the type_uid.

Context

Section titled “Context”

metadata

The metadata associated with the event.

client_dialects

  • Type: string_t
  • Requirement: recommended

The list of SMB dialects that the client speaks.

dialect

  • Type: string_t
  • Requirement: recommended

The negotiated protocol dialect.

api cloud

  • Type: api
  • Requirement: optional

Describes details about a typical API (Application Programming Interface) call.

app_name

  • Type: string_t
  • Requirement: optional

The name of the application that is associated with the event or object.

dce_rpc

  • Type: dce_rpc
  • Requirement: optional

The DCE/RPC object describes the remote procedure call system for distributed computing environments.

enrichments

The additional information from an external data source, which is associated with the event. 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"}}]

raw_data

  • Type: string_t
  • Requirement: optional

The event data as received from the event source.

unmapped

  • Type: object
  • Requirement: optional

The attributes that are not mapped to the event schema. The names and values of those attributes are specific to the event source.

Occurrence

Section titled “Occurrence”

time

  • Type: timestamp_t
  • Requirement: required

The normalized event occurrence time.

timezone_offset

  • Type: integer_t
  • Requirement: recommended

The number of minutes that the reported event time is ahead or behind UTC, in the range -1,080 to +1,080.

count

  • Type: integer_t
  • Requirement: optional

The number of times that events in the same logical group occurred during the event Start Time to End Time period.

duration

  • Type: integer_t
  • Requirement: optional

The event duration or aggregate time, the amount of time the event covers from start_time to end_time in milliseconds.

end_time

  • Type: timestamp_t
  • Requirement: optional

The end time of a time period, or the time of the most recent event included in the aggregate event.

end_time_dt datetime

  • Type: datetime_t
  • Requirement: optional

The end time of a time period, or the time of the most recent event included in the aggregate event.

start_time

  • Type: timestamp_t
  • Requirement: optional

The start time of a time period, or the time of the least recent event included in the aggregate event.

start_time_dt datetime

  • Type: datetime_t
  • Requirement: optional

The start time of a time period, or the time of the least recent event included in the aggregate event.

time_dt datetime

  • Type: datetime_t
  • Requirement: optional

The normalized event occurrence time.

Primary

Section titled “Primary”

cloud cloud

  • Type: cloud
  • Requirement: required

Describes details about the Cloud environment where the event was originally created or logged.

disposition_id security_control

  • Type: integer_t
  • Requirement: required
  • Values:
    • 0 - Unknown
    • 1 - Allowed
    • 2 - Blocked
    • 3 - Quarantined
    • 4 - Isolated
    • 5 - Deleted
    • 6 - Dropped
    • 7 - Custom Action: Executed custom action such as run a command script.
    • 8 - Approved
    • 9 - Restored
    • 10 - Exonerated: No longer suspicious (re-scored).
    • 11 - Corrected
    • 12 - Partially Corrected
    • 13 - Uncorrected
    • 14 - Delayed: Requires reboot to finish the operation.
    • 15 - Detected
    • 16 - No Action
    • 17 - Logged
    • 18 - Tagged: Marked with extended attributes.
    • 99 - Other

When security issues, such as malware or policy violations, are detected and possibly corrected, then disposition_id describes the action taken by the security product.

dst_endpoint

The responder (server) in a network connection.

src_endpoint

The initiator (client) of the network connection.

attacks security_control

  • Type: attack
  • Requirement: recommended

An array of attacks associated with an event.

command

  • Type: string_t
  • Requirement: recommended

The command name (e.g. SMB2_COMMAND_CREATE, SMB1_COMMAND_WRITE_ANDX).

connection_info

The network connection information.

device host

  • Type: device
  • Requirement: recommended

An addressable device, computer system or host.

file

  • Type: file
  • Requirement: recommended

The file that is the target of the SMB activity.

message

  • Type: string_t
  • Requirement: recommended

The description of the event, as defined by the event source.

open_type

  • Type: string_t
  • Requirement: recommended

Indicates how the file was opened (e.g. normal, delete on close).

response

  • Type: response
  • Requirement: recommended

The server response in an SMB network connection.

share_type_id

  • Type: integer_t
  • Requirement: recommended
  • Values:
    • 0 - Unknown: The share type is not known.
    • 1 - File
    • 2 - Pipe
    • 3 - Print
    • 99 - Other: The share type is not mapped.

The normalized identifier of the SMB share type.

status_id

  • Type: integer_t
  • Requirement: recommended
  • Values:
    • 0 - Unknown
    • 1 - Success
    • 2 - Failure
    • 99 - Other: The event status is not mapped. See the status attribute, which contains a data source specific value.

The normalized identifier of the event status.

actor host

  • Type: actor
  • Requirement: optional

The actor object describes details about the user/role/process that was the source of the activity.

disposition security_control

  • Type: string_t
  • Requirement: optional

The event disposition name, normalized to the caption of the disposition_id value. In the case of ‘Other’, it is defined by the event source.

malware security_control

  • Type: malware
  • Requirement: optional

The list of malware identified by a finding.

observables

The observables associated with the event.

proxy

If a proxy connection is present, the connection from the client to the proxy server.

share

  • Type: string_t
  • Requirement: optional

The SMB share name.

share_type

  • Type: string_t
  • Requirement: optional

The SMB share type, normalized to the caption of the share_type_id value. In the case of ‘Other’, it is defined by the event source.

status

  • Type: string_t
  • Requirement: optional

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

  • Type: string_t
  • Requirement: optional

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_detail

  • Type: string_t
  • Requirement: optional

The status details contains additional information about the event outcome.

tls

  • Type: tls
  • Requirement: optional

The Transport Layer Security (TLS) attributes.

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.

tree_uid

  • Type: string_t
  • Requirement: optional

The tree id is a unique SMB identifier which represents an open connection to a share.

Objects Used

Section titled “Objects Used”