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@zschmerber
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i do not have time to make sample data yet but can get to that later

root.category_uid = 1
root.category_name = "System Activity"
root.class_uid = 201003
root.class_name = "Windows Resource Activity"
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This is a custom event class. Do you have a pointer to it?

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When the windows extension is enabled it shows up
image

@mavam
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mavam commented May 26, 2025

What if we didn't have your extension, would this be reasonable summary of mapping of event IDs to classes?

Sysmon Event ID Sysmon Event Description (from Microsoft) OCSF Event Class Name
1 Process creation Process Activity
2 A process changed a file creation time File System Activity
3 Network connection Network Activity
4 Sysmon service state changed Process Activity
5 Process terminated Process Activity
6 Driver loaded Kernel Activity
7 Image loaded Process Activity
8 CreateRemoteThread Process Activity
9 RawAccessRead Process Activity
10 ProcessAccess Process Activity
11 FileCreate File System Activity
12 RegistryEvent (Object create and delete) Registry Activity
13 RegistryEvent (Value Set) Registry Activity
14 RegistryEvent (Key and Value Rename) Registry Activity
15 FileCreateStreamHash File System Activity
16 ServiceConfigurationChange Device Config State
17 PipeEvent (Pipe Created) File System Activity
18 PipeEvent (Pipe Connected) File System Activity
19 WmiEvent (WmiEventFilter activity detected) Process Activity
20 WmiEvent (WmiEventConsumer activity detected) Process Activity
21 WmiEvent (WmiEventConsumerToFilter activity detected) Process Activity
22 DNSEvent (DNS query) DNS Activity
23 FileDelete (File Delete archived) File System Activity
25 ProcessTampering (Process image change) Process Activity
26 FileDeleteDetected (File Delete logged) File System Activity
27 FileBlockExecutable File System Activity
28 FileBlockShredding File System Activity
29 FileExecutableDetected File System Activity

@zschmerber
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  ## System Activity
  # File System - EventId 11
  # File System - EventId 15
  # File System - EventId 23
  # File System - EventId 26
  # Kernel Extension - EventId 6
  # Module  - EventId 7
  # Process - EventId 1
  # Process - EventId 5
  # Process - EventId 8
  # Process - EventId 10
  # Process - EventId 25
  # registry_key_activity - EventID 12
  # registry_key_activity - EventID 13
  # System Activity - EventId 17
  # Windows Resource Activity - EventId 18

  ## Network Activity
  # Network  - EventId 3
  # DNS  - EventId 22

  ## Discovery
  # Device Config state - EventID 4
  # Device Config state - EventID 16
  # Device Config state - EventID 255

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4 participants