Malicious incident visualization

1. A method comprising:

receiving event data associated with an event on a first host device;

detecting, based at least in part on the event data, an incident associated with the event;

determining a first value to visually represent the incident in a user interface based at least in part on an incident score representative of a likelihood for the incident to impact operation of the first host device;

determining that the event on the first host device initiates a process or a thread on a second host device;

determining, based at least in part on determining that the event on the first host device initiates the process or the thread on the second host device, a second value to visually represent the process or the thread on the second host device in the user interface;

outputting, based at least in part on the first value and the second value, an image in the user interface that represents the incident on the first host device and the process or the thread on the second host device, the image comprising a connector between the first host device and the second host device to visually represent the incident on the first host device and the process or the thread on the second host device; and

determining, based at least in part on the image, whether or not the incident associated with the event is a malicious incident.

2. The method as recited in claim 1 , further comprising:

generating a first graph based at least in part on the first value;

generating a second graph based at least in part on the second value; and

outputting the connector in the user interface between a portion of the first graph and a portion of the second graph, and

wherein determining whether or not the incident associated with the event is the malicious incident is further based at least in part on outputting the connector in the user interface.

3. The method as recited in claim 2 , wherein:

the first graph is associated with a pre-boot activity on the first host device, and

the second graph is associated with a post-boot activity on the first host device.

4. The method as recited in claim 2 , wherein:

the first graph is associated with user authentication activity on the first host device, and

the second graph is associated with activity on the second host device that is initiated by the user authentication activity on the first host device.

5. The method as recited in claim 2 , wherein outputting the connector in the user interface comprises:

outputting a first end of the connector for presentation at the portion of the first graph corresponding to the incident; and

outputting a second end of the connector for presentation at the portion of the second graph corresponding to an activity on the second host device associated with the event on the first host device.

6. The method as recited in claim 5 , wherein at least one of:

the first end of the connector comprises one or more symbols to communicate an activity type for the incident, a related event, or a level of suspicious activity for the incident, or

the second end of the connector comprises one or more symbols to communicate a level of suspicious activity for the process or the thread on the second host device.

7. The method as recited in claim 1 , wherein determining whether or not the incident associated with the event is malicious comprises at least one of:

receiving input via the user interface verifying that a pattern in the image is suspicious and determining that the incident associated with the event is malicious based at least in part on the input; or

receiving input via the user interface verifying that the pattern in the image is not suspicious and determining that the incident associated with the event is not malicious based at least in part on the input.

8. The method as recited in claim 1 , wherein determining the second value to visually represent the process or the thread on the second host device in the user interface is performed independent of analyzing network activity between the first host device and the second host device.

9. The method as recited in claim 1 , further comprising:

determining a pattern associated with the event, the pattern including a visual representation of the event over a time interval;

determining a time within the time interval at which the incident occurs; and

verifying that the incident score satisfies a confidence threshold, and

wherein determining the first value to represent the incident based at least in part on the incident score comprises modifying the pattern to represent the incident at the time within the time interval at which the incident occurs.

10. The method as recited in claim 1 , wherein determining that the event on the first host device initiates the process or the thread on the second host device is based at least in part on an activity type associated with the incident.

11. The method as recited in claim 10 , wherein the activity type associated with the incident comprises at least one of: user authentication activity, service activity, or scheduled task activity.

12. The method as recited in claim 1 , wherein:

the event comprises a thread or a process;

the incident comprises a portion of the thread or the process; and

the image output in the user interface communicates a level of impact of the portion of the thread or the process associated with the event on operation of the first host device or the second host device.

13. A system comprising:

one or more processors; and

one or more computer-readable media storing instructions that, when executed by the one or more processors, cause the one or more processors to perform operations comprising:

receiving event data associated with an event on a first host device;

detecting, based at least in part on the event data, an incident associated with the event;

determining a first value to visually represent the incident in a user interface based at least in part on an incident score representative of a likelihood for the incident to impact operation of the first host device;

determining that the event on the first host device initiates a process or a thread on a second host device;

determining, based at least in part on determining that the event on the first host device initiates the process or the thread on the second host device, a second value to visually represent, in the user interface, the process or the thread on the second host device associated with the event;

outputting, based at least in part on the first value and the second value, an image in the user interface that represents a connection between the incident on the first host device and the process or the thread on the second host device; and

determining, based at least in part on the image, whether or not the incident associated with the event is a malicious incident.

14. The system as recited in claim 13 , further comprising correlating the event on the first host device with the process or the thread on the second host device based at least in part on determining that the event on the first host device initiates the process or the thread on the second host device.

15. The system as recited in claim 13 , wherein determining whether or not the incident associated with the event is malicious comprises at least one of:

receiving input via the user interface verifying that a pattern in the image is suspicious and determining that the incident associated with the event is malicious based at least in part on the input; or

receiving input via the user interface verifying that the pattern in the image is not suspicious and determining that the incident associated with the event is not malicious based at least in part on the input.

16. The system as recited in claim 13 , the operations further comprising:

generating a first graph based at least in part on the first value;

generating a second graph based at least in part on the second value;

combining the first graph and the second graph as a combined graph; and

outputting the image in the user interface comprises outputting the combined graph.

17. The system as recited in claim 13 , wherein determining the second value to visually represent the process or the thread on the second host device comprises determining that the process or the thread is suspicious based at least in part on the first value.

18. A non-transitory computer-readable storage media storing instructions that, when executed, cause one or more processors to perform operations comprising:

receiving event data associated with an event on a first host device;

detecting, based at least in part on the event data, an incident associated with the event;

determining a first value to visually represent the incident in a user interface based at least in part on an incident score representative of a likelihood for the incident to impact operation of the first host device;

determining that the event on the first host device initiates a process or a thread on a second host device;

determining, based at least in part on determining that the event on the first host device initiates the process or the thread on the second host device, a second value to visually represent the process or the thread on the second host device in the user interface;

outputting, based at least in part on the first value and the second value, an image in the user interface that represents the incident on the first host device and the process or the thread on the second host device, the image comprising a connector between the first host device and the second host device to visually represent the incident on the first host device and the process or the thread on the second host device; and

determining, based at least in part on the image, whether or not the incident associated with the event is malicious.

19. The non-transitory computer-readable storage media of claim 18 , wherein outputting, based at least in part on the first value and the second value, the image in the user interface comprises:

determining an activity connecting a first graph associated with the first value and a second graph associated with the second value;

combining, as a combined graph, the first graph and the second graph; and

outputting the image in the user interface comprises outputting the combined graph to indicate the activity connecting the first graph and the second graph.

20. The non-transitory computer-readable storage media of claim 19 , wherein the first graph or the second graph comprises one or more of: a process tree or one or more symbols to represent activity by a processor of the first host device.