Process Activity [1007] Class
Applicable Profiles: Cloud Date/Time Host OSINT Security Control Data Classification Container Linux Users

System Activity Category

Process Activity events report when a process launches, injects, opens or terminates another process, successful or otherwise.
Name Caption Group Requirement Type Description
action Action primary Optional String The normalized caption of action_id.
This is the string sibling of enum attribute action_id.
action_id Action ID primary Recommended 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.
0Unknown
The action was unknown. The disposition_id attribute may still be set to a non-unknown value, for example 'Custom Action', 'Challenge'.
1Allowed
The activity was allowed. The disposition_id attribute should be set to a value that conforms to this action, for example 'Allowed', 'Approved', 'Delayed', 'No Action', 'Count' etc.
2Denied
The attempted activity was denied. The disposition_id attribute should be set to a value that conforms to this action, for example 'Blocked', 'Rejected', 'Quarantined', 'Isolated', 'Dropped', 'Access Revoked, etc.
3Observed
The activity was observed, but neither explicitly allowed nor denied. This is common with IDS and EDR controls that report additional information on observed behavior such as TTPs. The disposition_id attribute should be set to a value that conforms to this action, for example 'Logged', 'Alert', 'Detected', 'Count', etc.
4Modified
The activity was modified, adjusted, or corrected. The disposition_id attribute should be set appropriately, for example 'Restored', 'Corrected', 'Delayed', 'Captcha', 'Tagged'.
99Other
The action is not mapped. See the action attribute which contains a data source specific value.
This is an enum attribute; its string sibling is action.
activity_id Activity ID classification Required Integer The normalized identifier of the activity that triggered the event.
0Unknown
The event activity is unknown.
1Launch
A request by the actor to launch another process. Refer to the launch_type_id attribute for details of the specific launch type.
2Terminate
A request by the actor to terminate a process. This activity is most commonly reflexive, this being the case when a process exits at its own initiation. Note too that Windows security products cannot always identify the actor in the case of inter-process termination. In this case, actor.process and process refer to the exiting process, i.e. indistinguishable from the reflexive case.
3Open
A request by the actor to obtain a handle or descriptor to a process with the aim of performing further actions upon that process. The target is usually a different process but this activity can also be reflexive.
4Inject
A request by the actor to execute code within the context of a process. The target is usually a different process but this activity can also be reflexive. Refer to the injection_type_id attribute for details of the specific injection type.
Refs:Guidance on the use of "Module Activity: Load" and "Process Activity: Inject".
5Set User ID
A request by the actor to change its user identity by invoking the setuid() system call. Common programs like su and sudo use this mechanism. Note that the impersonation mechanism on Windows is not directly equivalent because it acts at the thread level.
99Other
The event activity is not mapped. See the activity_name attribute, which contains a data source specific value.
This is an enum attribute; its string sibling is activity_name.

Refs:setuid() man page
activity_name Activity classification Optional String The event activity name, as defined by the activity_id.
This is the string sibling of enum attribute activity_id.
actor Actor primary Required Actor The actor that performed the activity on the target process. For example, the process that started a new process or injected code into another process.
actual_permissions Actual Permissions primary Recommended Integer The permissions that were granted to the process in a platform-native format.
api API Details context Optional API Describes details about a typical API (Application Programming Interface) call.
attacks MITRE ATT&CK® and ATLAS™ Details primary Optional MITRE ATT&CK® & ATLAS™ Array An array of MITRE ATT&CK® objects describing identified tactics, techniques & sub-techniques. The objects are compatible with MITRE ATLAS™ tactics, techniques & sub-techniques.

Refs:MITRE ATT&CK® MITRE ATLAS
authorizations Authorization Information primary Optional Authorization Result Array Provides details about an authorization, such as authorization outcome, and any associated policies related to the activity/event.
category_name Category classification Optional String The event category name, as defined by category_uid value: System Activity.
This is the string sibling of enum attribute category_uid.
category_uid Category ID classification Required Integer The category unique identifier of the event.
1System Activity
System Activity events.
This is an enum attribute; its string sibling is category_name.
class_name Class classification Optional String The event class name, as defined by class_uid value: Process Activity.
This is the string sibling of enum attribute class_uid.
class_uid Class ID classification Required Integer The unique identifier of a class. A class describes the attributes available in an event.
1007Process Activity
Process Activity events report when a process launches, injects, opens or terminates another process, successful or otherwise.
This is an enum attribute; its string sibling is class_name.
cloud Cloud primary Required Cloud Describes details about the Cloud environment where the event or finding was created.
confidence Confidence context Optional String The confidence, normalized to the caption of the confidence_id value. In the case of 'Other', it is defined by the event source.
This is the string sibling of enum attribute confidence_id.
confidence_id Confidence ID context Recommended Integer 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.
0Unknown
The normalized confidence is unknown.
1Low
2Medium
3High
99Other
The confidence is not mapped to the defined enum values. See the confidence attribute, which contains a data source specific value.
This is an enum attribute; its string sibling is confidence.
confidence_score Confidence Score context Optional Integer The confidence score as reported by the event source.
count Count occurrence Optional Integer The number of times that events in the same logical group occurred during the event Start Time to End Time period.
device Device O primary Required Device An addressable device, computer system or host.
disposition Disposition primary Optional 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.
This is the string sibling of enum attribute disposition_id.
disposition_id Disposition ID primary Recommended Integer Describes the outcome or action taken by a security control, such as access control checks, malware detections or various types of policy violations.
0Unknown
The disposition is unknown.
1Allowed
Granted access or allowed the action to the protected resource.
2Blocked
Denied access or blocked the action to the protected resource.
3Quarantined
A suspicious file or other content was moved to a benign location.
4Isolated
A session was isolated on the network or within a browser.
5Deleted
A file or other content was deleted.
6Dropped
The request was detected as a threat and resulted in the connection being dropped.
7Custom Action
A custom action was executed such as running of a command script. Use the message attribute of the base class for details.
8Approved
A request or submission was approved. For example, when a form was properly filled out and submitted. This is distinct from 1 'Allowed'.
9Restored
A quarantined file or other content was restored to its original location.
10Exonerated
A suspicious or risky entity was deemed to no longer be suspicious (re-scored).
11Corrected
A corrupt file or configuration was corrected.
12Partially Corrected
A corrupt file or configuration was partially corrected.
13Uncorrected
A corrupt file or configuration was not corrected.
14Delayed
An operation was delayed, for example if a restart was required to finish the operation.
15Detected
Suspicious activity or a policy violation was detected without further action.
16No Action
The outcome of an operation had no action taken.
17Logged
The operation or action was logged without further action.
18Tagged
A file or other entity was marked with extended attributes.
19Alert
The request or activity was detected as a threat and resulted in a notification but request was not blocked.
20Count
Counted the request or activity but did not determine whether to allow it or block it.
21Reset
The request was detected as a threat and resulted in the connection being reset.
22Captcha
Required the end user to solve a CAPTCHA puzzle to prove that a human being is sending the request.
23Challenge
Ran a silent challenge that required the client session to verify that it's a browser, and not a bot.
24Access Revoked
The requestor's access has been revoked due to security policy enforcements. Note: use the Host profile if the User or Actor requestor is not present in the event class.
25Rejected
A request or submission was rejected. For example, when a form was improperly filled out and submitted. This is distinct from 2 'Blocked'.
26Unauthorized
An attempt to access a resource was denied due to an authorization check that failed. This is a more specific disposition than 2 'Blocked' and can be complemented with the authorizations attribute for more detail.
27Error
An error occurred during the processing of the activity or request. Use the message attribute of the base class for details.
99Other
The disposition is not mapped. See the disposition attribute, which contains a data source specific value.
This is an enum attribute; its string sibling is disposition.
duration Duration Milliseconds occurrence Optional Long 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 occurrence Optional Timestamp The end time of a time period, or the time of the most recent event included in the aggregate event.
end_time_dt End Time occurrence Optional Datetime The end time of a time period, or the time of the most recent event included in the aggregate event.
enrichments Enrichments context Optional Enrichment Array 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"}}]
exit_code Exit Code primary Recommended Integer The exit code reported by a process when it terminates. The convention is that zero indicates success and any non-zero exit code indicates that some error occurred.
firewall_rule Firewall Rule primary Optional Firewall Rule The firewall rule that pertains to the control that triggered the event, if applicable.
injection_type Injection Type primary Recommended String The process injection method, normalized to the caption of the injection_type_id value. In the case of 'Other', it is defined by the event source.
This is the string sibling of enum attribute injection_type_id.
injection_type_id Injection Type ID primary Recommended Integer The normalized identifier of the process injection method.
0Unknown
The injection type is unknown.
1Remote Thread
2Load Library
3Queue APC
99Other
The injection type is not mapped. See the injection_type attribute, which contains a data source specific value.
This is an enum attribute; its string sibling is injection_type.
is_alert Alert primary Recommended 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.
launch_type Launch Type primary Recommended String The specific type of Launch activity, normalized to the caption of the launch_type_id value. In the case of Other it is defined by the event source.
This is the string sibling of enum attribute launch_type_id.
launch_type_id Launch Type ID primary Recommended Integer The normalized identifier for the specific type of Launch activity.
0Unknown
The launch type is unknown or not specified.
1Spawn
Denotes that the Launch event represents atomic creation of a new process on Windows. This launch type ID may also be used to represent both steps of Unix process creation in a single Launch event.
2Fork
Denotes that the Launch event represents the "fork" step of Unix process creation, where a process creates a clone of itself in a parent-child relationship. WSL1 pico processes on Windows also use the 2-step Unix model.
3Exec
Denotes that the Launch event represents the "exec" step of Unix process creation, where a process replaces its executable image, command line, and environment. WSL1 pico processes on Windows also use the 2-step Unix model.
99Other
The launch type is not mapped. See the launch_type attribute, which contains a data source specific value.
This is an enum attribute; its string sibling is launch_type.

Refs:fork() man page execve() man page
malware Malware primary Optional Malware Array A list of Malware objects, describing details about the identified malware.
malware_scan_info Malware Scan Info primary Optional Malware Scan Info Describes details about the scan job that identified malware on the target system.
message Message primary Recommended String The description of the event/finding, as defined by the source.
metadata Metadata context Required Metadata The metadata associated with the event or a finding.
module Module primary Recommended Module The module that was injected by the actor process.
observables Observables primary Recommended Observable Array The observables associated with the event or a finding.

Refs:OCSF Observables FAQ
osint OSINT primary Required OSINT Array 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 primary Optional 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.
process Process O primary Required Process The process that was launched, injected into, opened, or terminated.
raw_data Raw Data context Optional String The raw event/finding data as received from the source.
raw_data_hash Raw Data Hash O context Optional Fingerprint The hash, which describes the content of the raw_data field.
raw_data_size Raw Data Size context Optional Long The size of the raw data which was transformed into an OCSF event, in bytes.
requested_permissions Requested Permissions primary Recommended Integer The permissions mask that was requested by the process.
risk_details Risk Details context Optional String Describes the risk associated with the finding.
risk_level Risk Level context Optional String The risk level, normalized to the caption of the risk_level_id value.
This is the string sibling of enum attribute risk_level_id.
risk_level_id Risk Level ID context Optional Integer The normalized risk level id.
0Info
1Low
2Medium
3High
4Critical
99Other
The risk level is not mapped. See the risk_level attribute, which contains a data source specific value.
This is an enum attribute; its string sibling is risk_level.
risk_score Risk Score context Optional Integer The risk score as reported by the event source.
severity Severity classification Optional 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.
This is the string sibling of enum attribute severity_id.
severity_id Severity ID classification Required 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.
0Unknown
The event/finding severity is unknown.
1Informational
Informational message. No action required.
2Low
The user decides if action is needed.
3Medium
Action is required but the situation is not serious at this time.
4High
Action is required immediately.
5Critical
Action is required immediately and the scope is broad.
6Fatal
An error occurred but it is too late to take remedial action.
99Other
The event/finding severity is not mapped. See the severity attribute, which contains a data source specific value.
This is an enum attribute; its string sibling is severity.
start_time Start Time occurrence Optional Timestamp The start time of a time period, or the time of the least recent event included in the aggregate event.
start_time_dt Start Time occurrence Optional Datetime The start time of a time period, or the time of the least recent event included in the aggregate event.
status Status primary Recommended 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.
This is the string sibling of enum attribute status_id.
status_code Status Code primary Recommended 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_detail Status Detail primary Recommended String The status detail contains additional information about the event/finding outcome.
status_id Status ID primary Recommended Integer The normalized identifier of the event status.
0Unknown
The status is unknown.
1Success
2Failure
99Other
The status is not mapped. See the status attribute, which contains a data source specific value.
This is an enum attribute; its string sibling is status.
time Event Time occurrence Required Timestamp The normalized event occurrence time or the finding creation time.
time_dt Event Time occurrence Optional Datetime The normalized event occurrence time or the finding creation time.
timezone_offset Timezone Offset occurrence Recommended Integer The number of minutes that the reported event time is ahead or behind UTC, in the range -1,080 to +1,080.
type_name Type Name classification Optional String The event/finding type name, as defined by the type_uid.
This is the string sibling of enum attribute type_uid.
type_uid Type ID classification Required 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.
100700Process Activity: Unknown
100701Process Activity: Launch
A request by the actor to launch another process. Refer to the launch_type_id attribute for details of the specific launch type.
100702Process Activity: Terminate
A request by the actor to terminate a process. This activity is most commonly reflexive, this being the case when a process exits at its own initiation. Note too that Windows security products cannot always identify the actor in the case of inter-process termination. In this case, actor.process and process refer to the exiting process, i.e. indistinguishable from the reflexive case.
100703Process Activity: Open
A request by the actor to obtain a handle or descriptor to a process with the aim of performing further actions upon that process. The target is usually a different process but this activity can also be reflexive.
100704Process Activity: Inject
A request by the actor to execute code within the context of a process. The target is usually a different process but this activity can also be reflexive. Refer to the injection_type_id attribute for details of the specific injection type.
Refs:Guidance on the use of "Module Activity: Load" and "Process Activity: Inject".
100705Process Activity: Set User ID
A request by the actor to change its user identity by invoking the setuid() system call. Common programs like su and sudo use this mechanism. Note that the impersonation mechanism on Windows is not directly equivalent because it acts at the thread level.
100799Process Activity: Other
This is an enum attribute; its string sibling is type_name.
unmapped Unmapped Data context Optional Object The attributes that are not mapped to the event schema. The names and values of those attributes are specific to the event source.
Attribute Associations
actor.user: device
device: actor.user