Windows日志筛选

时间：2018-05-22 18:33:55 收藏：0 阅读：967

Windows日志筛选

因工作需求开启文件系统审核，因Windows日志管理器并不方便筛选查阅，所以使用powershell方法进行筛选。

一、需求分析

存在问题
1. 日志量巨大（每天约1G）
2. 日志管理器查询日志不便
主要目标
1. 启用文件系统审核
2. 快捷查询用户的删除操作
解决方案
1. 采用轮替方式归档日志（500MB）
2. 日志存放60天（可用脚本删除超过期限日志档案）
3. 使用Get-WinEvent中的FilterXPath过日志进行筛选，格式打印
4. 删除操作码为0x10000，可对其进行筛选

二、文件审核设置

2.1 开启文件系统审核功能

secpol.msc
Advanced Audit Policy Configuration
Object Access
Audit File System
- [x] Configure the following audit events:
- [x] Success
- [x] Failure

2.2 建立共享文件夹

Folder Properties
Sharing
Choose people to share with
Everyone

2.3 设置文件夹审核的用户组

Folder Properties
Security
Advanced
Auditing
Add user

三、方法

筛选事件ID为4460日志

PS C:\Windows\system32>  Get-WinEvent -LogName Security -FilterXPath "*[System[EventID=4660]]"

   ProviderName: Microsoft-Windows-Security-Auditing

TimeCreated                     Id LevelDisplayName Message
-----------                     -- ---------------- -------
5/22/2018 10:01:37 AM         4660 Information      An object was deleted....
5/22/2018 9:03:11 AM          4660 Information      An object was deleted....

筛选文件删除日志

PS C:\Windows\system32> Get-WinEvent -LogName "Security" -FilterXPath "*[EventData[Data[@Name=‘AccessMask‘]=‘0x10000‘]]"

   ProviderName: Microsoft-Windows-Security-Auditing

TimeCreated                     Id LevelDisplayName Message
-----------                     -- ---------------- -------
5/22/2018 10:01:37 AM         4663 Information      An attempt was made to access an object....
5/22/2018 9:03:11 AM          4663 Information      An attempt was made to access an object....

筛选指定用户文件删除日志

PS C:\Windows\system32> Get-WinEvent -LogName "Security" -FilterXPath "*[EventData[Data[@Name=‘AccessMask‘]=‘0x10000‘]] and *[EventData[Data[@Name=‘SubjectUserName‘]=‘lxy‘]]"

   ProviderName: Microsoft-Windows-Security-Auditing

TimeCreated                     Id LevelDisplayName Message
-----------                     -- ---------------- -------
5/22/2018 9:03:11 AM          4663 Information      An attempt was made to access an object....

以变量方式筛选指定用户文件删除日志

PS C:\Windows\system32> $AccessMask=‘0x10000‘
PS C:\Windows\system32> $UserName=‘lxy‘
PS C:\Windows\system32> Get-WinEvent -LogName "Security" -FilterXPath "*[EventData[Data[@Name=‘AccessMask‘]=‘$AccessMask‘]] and *[EventData[Data[@Name=‘SubjectUserName‘]=‘$UserName‘]]"

   ProviderName: Microsoft-Windows-Security-Auditing

TimeCreated                     Id LevelDisplayName Message
-----------                     -- ---------------- -------
5/22/2018 9:03:11 AM          4663 Information      An attempt was made to access an object....

从保存的文件筛选文件删除日志

PS C:\Users\F2844290> Get-WinEvent -Path ‘C:\Users\F2844290\Desktop\SaveSec.evtx‘ -FilterXPath "*[EventData[Data[@Name=‘
AccessMask‘]=‘0x10000‘]]"PS C:\Windows\system32> $AccessMask=‘0x10000‘

筛选10分钟内发生的安全性日志
XML中时间计算单位为ms，10minute=60 10 1000=600000

PS C:\Windows\system32> Get-WinEvent -LogName Security -FilterXPath "*[System[TimeCreated[timediff(@SystemTime) < 600000]]]"

   ProviderName: Microsoft-Windows-Security-Auditing

TimeCreated                     Id LevelDisplayName Message
-----------                     -- ---------------- -------
5/22/2018 4:11:30 PM          4663 Information      An attempt was made to access an object....
5/22/2018 4:11:30 PM          4663 Information      An attempt was made to access an object....
5/22/2018 4:11:30 PM          4663 Information      An attempt was made to access an object....
5/22/2018 4:11:30 PM          4663 Information      An attempt was made to access an object....

其它

若有语法不明之处，可参考日志管理器中筛选当前日志的XML方法。

四、其它文件

文件删除日志结构

Log Name:      Security
Source:        Microsoft-Windows-Security-Auditing
Date:          5/22/2018 9:03:11 AM
Event ID:      4663
Task Category: File System
Level:         Information
Keywords:      Audit Success
User:          N/A
Computer:      IDX-ST-05
Description:
An attempt was made to access an object.

Subject:
    Security ID:        IDX-ST-05\lxy
    Account Name:       lxy
    Account Domain:     IDX-ST-05
    Logon ID:       0x2ed3b8

Object:
    Object Server:  Security
    Object Type:    File
    Object Name:    C:\Data\net.txt
    Handle ID:  0x444

Process Information:
    Process ID: 0x4
    Process Name:   

Access Request Information:
    Accesses:   DELETE

    Access Mask:    0x10000
Event Xml:
<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>4663</EventID>
    <Version>0</Version>
    <Level>0</Level>
    <Task>12800</Task>
    <Opcode>0</Opcode>
    <Keywords>0x8020000000000000</Keywords>
    <TimeCreated SystemTime="2018-05-22T01:03:11.876720000Z" />
    <EventRecordID>1514</EventRecordID>
    <Correlation />
    <Execution ProcessID="4" ThreadID="72" />
    <Channel>Security</Channel>
    <Computer>IDX-ST-05</Computer>
    <Security />
  </System>
  <EventData>
    <Data Name="SubjectUserSid">S-1-5-21-1815651738-4066643265-3072818021-1004</Data>
    <Data Name="SubjectUserName">lxy</Data>
    <Data Name="SubjectDomainName">IDX-ST-05</Data>
    <Data Name="SubjectLogonId">0x2ed3b8</Data>
    <Data Name="ObjectServer">Security</Data>
    <Data Name="ObjectType">File</Data>
    <Data Name="ObjectName">C:\Data\net.txt</Data>
    <Data Name="HandleId">0x444</Data>
    <Data Name="AccessList">%%1537
                </Data>
    <Data Name="AccessMask">0x10000</Data>
    <Data Name="ProcessId">0x4</Data>
    <Data Name="ProcessName">
    </Data>
  </EventData>
</Event>

文件操作码表

File Read
Accesses: ReadData (or ListDirectory)
AccessMask: 0x1

File Write
Accesses: WriteData (or AddFile)
AccessMask: 0x2

File Delete
Accesses: DELETE
AccessMask: 0x10000

File Rename
Accesses: DELETE
AccessMask: 0x10000

File Copy
Accesses: ReadData (or ListDirectory)
AccessMask: 0x1

File Permissions Change
Accesses: WRITE_DAC
AccessMask: 0x40000

File Ownership Change
Accesses: WRITE_OWNER
AccessMask: 0x80000