SMB Activity
smb_activity
Server Message Block (SMB) Protocol Activity events report client/server connections sharing resources within the network.
Attributes
Caption | Name | Type | 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. An unknown action may still correspond to a known disposition. Refer to disposition_id for the outcome of the action.
|
Activity ID | activity_id |
Integer |
Group:classification The normalized identifier of the activity that triggered the event.
|
Activity | activity_name |
String |
Group:classification 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. Note that this is not the threat actor of a campaign but may be part of a campaign. |
API Details | api |
API[] |
Group:context Describes details about a typical API (Application Programming Interface) call. |
Application Name | app_name |
String |
Group:context 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 identified tactics, techniques & sub-techniques. |
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 |
Group:classification The event category name, as defined by category_uid value. |
Category ID | category_uid |
Integer |
Group:classification The category unique identifier of the event.
|
Class | class_name |
String |
Group:classification The event class name, as defined by class_uid value. |
Class ID | class_uid |
Integer |
Group:classification The unique identifier of a class. A class describes the attributes available in an event.
|
Client Dialects | client_dialects |
String[] |
Group:context The list of SMB dialects that the client speaks. |
Cloud | cloud |
Cloud[] |
Group:primary Describes details about the Cloud environment where the event was originally created or logged. |
Command | command |
String |
Group:primary The command name (e.g. SMB2_COMMAND_CREATE, SMB1_COMMAND_WRITE_ANDX). |
Confidence | confidence |
String |
Group:context The confidence, normalized to the caption of the confidence_id value. In the case of 'Other', it is defined by the event source. |
Confidence ID | confidence_id |
Integer |
Group:context The normalized confidence refers to the accuracy of the rule that created the finding. A rule with a low confidence means that the finding scope is wide and may create finding reports that may not be malicious in nature.
|
Confidence Score | confidence_score |
Integer |
Group:context The confidence score as reported by the event source. |
Connection Info | connection_info |
Network Connection Information[] |
Group:primary The network connection information. |
Count | count |
Integer |
Group:occurrence The number of times that events in the same logical group occurred during the event Start Time to End Time period. |
Distributed Computing Environment/Remote Procedure Call (DCE/RPC) | dce_rpc |
DCE/RPC[] |
Group:context The DCE/RPC object describes the remote procedure call system for distributed computing environments. |
Device | device |
Device[] | An addressable device, computer system or host. |
Dialect | dialect |
String |
Group:context The negotiated protocol dialect. |
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.
|
Destination Endpoint | dst_endpoint |
Network Endpoint[] |
Group:primary The responder (server) in a network connection. |
Duration Milliseconds | duration |
Long |
Group:occurrence 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 |
Group:occurrence The end time of a time period, or the time of the most recent event included in the aggregate event. |
Enrichments | enrichments |
Enrichment[] |
Group:context 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"}}]
|
File | file |
File[] |
Entity:FILE Group: primary The file that is the target of the SMB activity. |
Firewall Rule | firewall_rule |
Firewall Rule[] | The firewall rule that pertains to the control that triggered the event, if applicable. |
Alert | is_alert |
Boolean |
Indicates that the event is considered to be an alertable signal. Should be set to true if disposition_id = Alert among other dispositions, and/or risk_level_id or severity_id of the event is elevated. Not all control events will be alertable, for example if disposition_id = Exonerated or disposition_id = Allowed .
|
JA4+ Fingerprints | ja4_fingerprint_list |
JA4+ Fingerprint[] |
Group:context A list of the JA4+ network fingerprints. |
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 |
Group:primary The description of the event/finding, as defined by the source. |
Metadata | metadata |
Metadata[] |
Group:context The metadata associated with the event or a finding. |
Observables | observables |
Observable[] |
Group:primary The observables associated with the event or a finding. |
Open Type | open_type |
String |
Group:primary Indicates how the file was opened (e.g. normal, delete on close). |
OSINT | osint |
OSINT[] |
Group:primary The OSINT (Open Source Intelligence) object contains details related to an indicator such as the indicator itself, related indicators, geolocation, registrar information, subdomains, analyst commentary, and other contextual information. This information can be used to further enrich a detection or finding by providing decisioning support to other analysts and engineers. |
Policy | policy |
Policy[] | The policy that pertains to the control that triggered the event, if applicable. For example the name of an anti-malware policy or an access control policy. |
Proxy | proxy |
Network Proxy Endpoint[] |
Group:primary The proxy (server) in a network connection.
|
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 |
Group:context The event data as received from the event source. |
Record ID | record_id |
String |
Group:primary Unique idenifier for the event |
API Response Details | response |
Response Elements[] |
Group:primary The server response in an SMB network connection. |
Risk Details | risk_details |
String |
Group:context Describes the risk associated with the finding. |
Risk Level | risk_level |
String |
Group:context The risk level, normalized to the caption of the risk_level_id value. |
Risk Level ID | risk_level_id |
Integer |
Group:context The normalized risk level id.
|
Risk Score | risk_score |
Integer |
Group:context The risk score as reported by the event source. |
Severity | severity |
String |
Group:classification 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 |
Group:classification 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.
|
Share | share |
String |
Group:primary The SMB share name. |
Share Type | share_type |
String |
Group:primary 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. |
Share Type ID | share_type_id |
Integer |
Group:primary The normalized identifier of the SMB share type.
|
Source Endpoint | src_endpoint |
Network Endpoint[] |
Group:primary The initiator (client) of the network connection. |
Start Time | start_time |
Timestamp |
Group:occurrence The start time of a time period, or the time of the least recent event included in the aggregate event. |
Status | status |
String |
Group:primary 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 |
Group:primary 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 | status_detail |
String |
Group:primary The status detail contains additional information about the event/finding outcome. |
Status ID | status_id |
Integer |
Group:primary The normalized identifier of the event status.
|
Event Time | time |
Timestamp |
Group:occurrence The normalized event occurrence time or the finding creation time. |
Timezone Offset | timezone_offset |
Integer |
Group:occurrence 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)[] |
Group:context The Transport Layer Security (TLS) attributes. |
Traffic | traffic |
Network Traffic[] |
Group:primary 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 | tree_uid |
String |
Group:primary The tree id is a unique SMB identifier which represents an open connection to a share. |
Type Name | type_name |
String |
Group:classification The event/finding type name, as defined by the type_uid. |
Type ID | type_uid |
Long |
Group:classification 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 .
|
Unmapped | unmapped |
Unmapped[] |
Group:context Data from the source that was not mapped into the schema. |
Relationships
Outbound Relationships
SMB Activity references the following objects and events in its attributes:
- Load Balancer
- Policy
- OSINT
- Cloud
- HTTP Request
- Network Connection Information
- Actor
- Device
- Network Endpoint
- Firewall Rule
- Observable
- DCE/RPC
- Enrichment
- Metadata
- JA4+ Fingerprint
- API
- Transport Layer Security (TLS)
- Network Proxy Endpoint
- Authorization Result
- Unmapped
- File
- Malware
- Network Traffic
- MITRE ATT&CK®
- Response Elements
- HTTP Response
This page describes ocsf-1.4.0
Updated 3 days ago