A network share object was added
A new SMB network share (`net share`) was created on the server.
Event ID 5142 logs the creation of a new network share (`Share Name` and `Share Path`). Attackers may create hidden network shares (`ShareName$` ending with dollar sign) to exfiltrate data or stage lateral movement tools across internal networks.
Failure Reason / Root Cause:
Server administration setting up file shares, or attacker creating unauthorized exfiltration shares (`net share staging$=C:\...`).
Raw Event XML snippet
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-Security-Auditing" Guid="{54849625-5478-4994-A5BA-3E3B0328C30D}" />
<EventID>5142</EventID>
<Version>0</Version>
<Level>0</Level>
<Task>12544</Task>
<Opcode>0</Opcode>
<Keywords>0x8020000000000000</Keywords>
<TimeCreated SystemTime="2026-07-17T09:54:44.933Z" />
<EventRecordID>1048576</EventRecordID>
<Correlation />
<Execution ProcessID="612" ThreadID="1024" />
<Channel>Security</Channel>
<Computer>DC01.enterprise.internal</Computer>
<Security />
</System>
<EventData>
<Data Name="SubjectUserSid">S-1-5-18</Data>
<Data Name="SubjectUserName">SYSTEM</Data>
<Data Name="SubjectDomainName">NT AUTHORITY</Data>
<Data Name="SubjectLogonId">0x3e7</Data>
<!-- Event telemetry fields specific to A network share object was added -->
</EventData>
</Event>MITRE ATT&CK mapping
| ID | Technique | Tactic |
|---|---|---|
T1048 | Exfiltration Over Alternative Protocol | Exfiltration |
Recommended actions
- Monitor for Event 5142 creating shares that point to root drives (`C:\`) or sensitive system directories.