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99 lines
3.1 KiB
Markdown
99 lines
3.1 KiB
Markdown
---
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title: 1105(S) Event log automatic backup. (Windows 10)
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description: Describes security event 1105(S) Event log automatic backup.
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ms.pagetype: security
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ms.prod: w10
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ms.mktglfcycl: deploy
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ms.sitesec: library
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author: Mir0sh
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---
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# 1105(S): Event log automatic backup.
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**Applies to**
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- Windows 10
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- Windows Server 2016
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<img src="images/event-1105.png" alt="Event 1105 illustration" width="572" height="317" hspace="10" align="left" />
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***Subcategory:*** [Other Events](other-events.md)
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***Event Description:***
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This event generates every time Windows security log becomes full and new event log file was created.
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This event generates, for example, if the maximum size of Security Event Log file was reached and event log retention method is: “[Archive the log when full, do not overwrite events](https://technet.microsoft.com/en-us/library/cc721981.aspx)”.
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> **Note** For recommendations, see [Security Monitoring Recommendations](#security-monitoring-recommendations) for this event.
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<br clear="all">
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***Event XML:***
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```
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- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
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- <System>
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<Provider Name="Microsoft-Windows-Eventlog" Guid="{fc65ddd8-d6ef-4962-83d5-6e5cfe9ce148}" />
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<EventID>1105</EventID>
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<Version>0</Version>
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<Level>4</Level>
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<Task>105</Task>
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<Opcode>0</Opcode>
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<Keywords>0x4020000000000000</Keywords>
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<TimeCreated SystemTime="2015-10-16T00:50:12.715302700Z" />
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<EventRecordID>1128551</EventRecordID>
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<Correlation />
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<Execution ProcessID="820" ThreadID="3660" />
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<Channel>Security</Channel>
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<Computer>DC01.contoso.local</Computer>
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<Security />
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</System>
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- <UserData>
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- <AutoBackup xmlns="http://manifests.microsoft.com/win/2004/08/windows/eventlog">
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<Channel>Security</Channel>
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<BackupPath>C:\\Windows\\System32\\Winevt\\Logs\\Archive-Security-2015-10-16-00-50-12-621.evtx</BackupPath>
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</AutoBackup>
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</UserData>
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</Event>
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```
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***Required Server Roles:*** None.
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***Minimum OS Version:*** Windows Server 2008, Windows Vista.
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***Event Versions:*** 0.
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***Field Descriptions:***
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**Log** \[Type = UnicodeString\]: the name of the log which was archived (new event log file was created and previous event log was archived). Always “**Security”** for Security Event Logs.
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**File**: \[Type = FILETIME\]: full path and filename of archived log file.
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The format of archived log file name is: “Archive-LOG\_FILE\_NAME-YYYY-MM-DD-hh-mm-ss-nnn.evtx”. Where:
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- LOG\_FILE\_NAME – the name of archived file.
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- Y – years.
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- M – months.
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- D – days.
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- h – hours.
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- m – minutes.
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- s – seconds.
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- n – fractional seconds.
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The time in this event is always in ***GMT+0/UTC+0*** time zone.
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## Security Monitoring Recommendations
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For 1105(S): Event log automatic backup.
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- Typically it’s an informational event and no actions are needed. But if your baseline settings are not set to [Archive the log when full, do not overwrite events](https://technet.microsoft.com/en-us/library/cc721981.aspx), then this event will be a sign that some settings are not set to baseline settings or were changed.
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