Data Source: Sysmon EventID 15

Created: 2024-05-22

Last Updated: 2026-10-14

ID: 95785e02-93b4-47e2-81f1-be326295348e

Author: Patrick Bareiss, Splunk

Description

Logs the creation of a new file stream, including details about the file stream's hash, path, and associated process metadata.

Details

Property	Value
Source	`XmlWinEventLog:Microsoft-Windows-Sysmon/Operational`
Sourcetype	`XmlWinEventLog`
Separator	EventID

Name ▲▼	Technique ▲▼	Type ▲▼
Windows MsMpEng Writing to System32	Exploitation for Privilege Escalation, Windows Service	TTP
Windows Wermgr Alternate Data Stream in Temp Dir	NTFS File Attributes	Anomaly
Download Files Using Telegram	Ingress Tool Transfer	TTP
Windows Defender Intermediary Artifact Was Observed	Exploitation for Privilege Escalation	Anomaly
Windows Alternate DataStream - Executable Content	NTFS File Attributes	TTP
Windows Alternate DataStream - Base64 Content	NTFS File Attributes	TTP

Supported Apps

Splunk Add-on for Sysmon (version 5.0.1)

Event Fields

+ Fields

  <span class="pill kill-chain">_time</span>
  
  <span class="pill kill-chain">action</span>
  
  <span class="pill kill-chain">Channel</span>
  
  <span class="pill kill-chain">Computer</span>
  
  <span class="pill kill-chain">Contents</span>
  
  <span class="pill kill-chain">CreationUtcTime</span>
  
  <span class="pill kill-chain">date_hour</span>
  
  <span class="pill kill-chain">date_mday</span>
  
  <span class="pill kill-chain">date_minute</span>
  
  <span class="pill kill-chain">date_month</span>
  
  <span class="pill kill-chain">date_second</span>
  
  <span class="pill kill-chain">date_wday</span>
  
  <span class="pill kill-chain">date_year</span>
  
  <span class="pill kill-chain">date_zone</span>
  
  <span class="pill kill-chain">dest</span>
  
  <span class="pill kill-chain">dvc</span>
  
  <span class="pill kill-chain">dvc_nt_host</span>
  
  <span class="pill kill-chain">event_id</span>
  
  <span class="pill kill-chain">EventChannel</span>
  
  <span class="pill kill-chain">EventCode</span>
  
  <span class="pill kill-chain">EventData_Xml</span>
  
  <span class="pill kill-chain">EventDescription</span>
  
  <span class="pill kill-chain">EventID</span>
  
  <span class="pill kill-chain">EventRecordID</span>
  
  <span class="pill kill-chain">eventtype</span>
  
  <span class="pill kill-chain">file_create_time</span>
  
  <span class="pill kill-chain">file_hash</span>
  
  <span class="pill kill-chain">file_name</span>
  
  <span class="pill kill-chain">file_path</span>
  
  <span class="pill kill-chain">Guid</span>
  
  <span class="pill kill-chain">Hash</span>
  
  <span class="pill kill-chain">host</span>
  
  <span class="pill kill-chain">id</span>
  
  <span class="pill kill-chain">Image</span>
  
  <span class="pill kill-chain">IMPHASH</span>
  
  <span class="pill kill-chain">index</span>
  
  <span class="pill kill-chain">Keywords</span>
  
  <span class="pill kill-chain">Level</span>
  
  <span class="pill kill-chain">linecount</span>
  
  <span class="pill kill-chain">MD5</span>
  
  <span class="pill kill-chain">Name</span>
  
  <span class="pill kill-chain">Opcode</span>
  
  <span class="pill kill-chain">os</span>
  
  <span class="pill kill-chain">process_exec</span>
  
  <span class="pill kill-chain">process_guid</span>
  
  <span class="pill kill-chain">process_id</span>
  
  <span class="pill kill-chain">process_name</span>
  
  <span class="pill kill-chain">process_path</span>
  
  <span class="pill kill-chain">ProcessGuid</span>
  
  <span class="pill kill-chain">ProcessId</span>
  
  <span class="pill kill-chain">ProcessID</span>
  
  <span class="pill kill-chain">punct</span>
  
  <span class="pill kill-chain">RecordID</span>
  
  <span class="pill kill-chain">RecordNumber</span>
  
  <span class="pill kill-chain">RuleName</span>
  
  <span class="pill kill-chain">SecurityID</span>
  
  <span class="pill kill-chain">severity</span>
  
  <span class="pill kill-chain">severity_id</span>
  
  <span class="pill kill-chain">SHA256</span>
  
  <span class="pill kill-chain">signature</span>
  
  <span class="pill kill-chain">signature_id</span>
  
  <span class="pill kill-chain">source</span>
  
  <span class="pill kill-chain">sourcetype</span>
  
  <span class="pill kill-chain">splunk_server</span>
  
  <span class="pill kill-chain">System_Props_Xml</span>
  
  <span class="pill kill-chain">SystemTime</span>
  
  <span class="pill kill-chain">tag</span>
  
  <span class="pill kill-chain">tag::eventtype</span>
  
  <span class="pill kill-chain">TargetFilename</span>
  
  <span class="pill kill-chain">Task</span>
  
  <span class="pill kill-chain">TaskCategory</span>
  
  <span class="pill kill-chain">ThreadID</span>
  
  <span class="pill kill-chain">TimeCreated</span>
  
  <span class="pill kill-chain">timeendpos</span>
  
  <span class="pill kill-chain">timestamp</span>
  
  <span class="pill kill-chain">timestartpos</span>
  
  <span class="pill kill-chain">user</span>
  
  <span class="pill kill-chain">User</span>
  
  <span class="pill kill-chain">user_id</span>
  
  <span class="pill kill-chain">UserID</span>
  
  <span class="pill kill-chain">UtcTime</span>
  
  <span class="pill kill-chain">vendor_product</span>
  
  <span class="pill kill-chain">Version</span>
  
</div>

Example Log

1<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"><System><Provider Name="Microsoft-Windows-Sysmon" Guid="5770385F-C22A-43E0-BF4C-06F5698FFBD9"></Provider><EventID>15</EventID><Version>2</Version><Level>4</Level><Task>15</Task><Opcode>0</Opcode><Keywords>0x8000000000000000</Keywords><TimeCreated SystemTime="2026-04-21T17:43:18.415078Z"></TimeCreated><EventRecordID>1590509</EventRecordID><Correlation></Correlation><Execution ProcessID="9912" ThreadID="5540"></Execution><Channel>Microsoft-Windows-Sysmon/Operational</Channel><Computer>WIN10-21H1.snapattack.labs</Computer><Security UserID="S-1-5-18"></Security></System><EventData><Data Name="RuleName">-</Data><Data Name="UtcTime">2026-04-21 17:43:18.408</Data><Data Name="ProcessGuid">F51F9151-8F0F-66AB-5100-000000000C00</Data><Data Name="ProcessId">3368</Data><Data Name="Image">C:\ProgramData\Microsoft\Windows Defender\Platform\4.18.24060.7-0\MsMpEng.exe</Data><Data Name="TargetFilename">C:\Windows\System32\drivers\ypupsude.sys</Data><Data Name="CreationUtcTime">2026-04-21 17:43:18.393</Data><Data Name="Hash">MD5=79534331D05DFD0F747E1C129F9607E3,SHA256=41989526B4EB8D60A5E158F835EE90EEA5FE4E499705109317CD6F72114C852F,IMPHASH=AB984C67B3F5AE12FA0E91909A378B14</Data><Data Name="Contents">-</Data><Data Name="User">NT AUTHORITY\SYSTEM</Data></EventData></Event>

Required Output Fields

dest
dvc
file_hash
file_name
file_path
process_exec
process_guid
process_id
process_name
process_path
signature
signature_id
user
user_id
vendor_product

Source: GitHub | Version: 5