KQL Search

SecurityAlert
| where AlertName has "Suspicious request to Kubernetes API" and ProviderName != "ASI Scheduled Alerts"
| extend ExtendedProperties = todynamic(ExtendedProperties)
| extend
    APIRequest = tostring(ExtendedProperties["API Request"]),
    ContainerID = tostring(ExtendedProperties["Container ID"]),
    ImageName = tostring(ExtendedProperties["Image Name"]),
    UserName = tostring(ExtendedProperties["User Name"]),
    ResourceType = tostring(ExtendedProperties["resourceType"])
// Clean Entities
| extend Entities = replace_regex(Entities, @'(\,\"\w+\"\:\{\"\$ref\"\:\"\d+\"\}|\,{\"\$ref\"\:\"\d+\"\})|\"\$id\"\:\"\d+\"\,', '')
| summarize
    TimeGenerated = min(TimeGenerated),
    StartTime = min(StartTime),
    EndTime = max(EndTime),
    ContainerIDs = make_set(ContainerID, 250),
    AlertLinks = make_set(AlertLink, 250),
    Entities = make_set(todynamic(Entities)),
    take_any(RemediationSteps, Tactics, Techniques)
    by AlertName, AlertSeverity, Description, ResourceId = tolower(ResourceId), APIRequest, ImageName, UserName, ResourceType
| project
    TimeGenerated,
    AlertName,
    AlertSeverity,
    Description,
    RemediationSteps,
    ResourceId,
    ResourceType,
    StartTime,
    EndTime,
    ImageName,
    UserName,
    APIRequest,
    ContainerIDs,
    AlertLinks,
    Tactics,
    Techniques,
    Entities