Sysmon + NXlog构建简单的windows安全监控

Posted 2020-08-28 安全工搬砖笔记

工具：

Sysmon （sysmon 5.0） ,NXlog（nxlog-ce-2.9.1716.msi） .

Sysmon监控系统并生成windows event log，   NXlog将windows event log传输到syslog服务器。

Sysmon可以监控Process create, Process terminate, Driver loaded, File creation time changed, RawAccessRead, CreateRemoteThread, Sysmon service state changed。

配置：

NXlog配置：

## This is a sample configuration file. See the nxlog reference manual about the
## configuration options. It should be installed locally and is also available
## online at http://nxlog.org/docs/

## Please set the ROOT to the folder your nxlog was installed into,
## otherwise it will not start.

#define ROOT C:\\Program Files\\nxlog
define ROOT C:\\Program Files (x86)\\nxlog

Moduledir %ROOT%\\modules
CacheDir %ROOT%\\data
Pidfile %ROOT%\\data\\nxlog.pid
SpoolDir %ROOT%\\data
LogFile %ROOT%\\data\\nxlog.log

<Extension _syslog>
    Module      xm_syslog
</Extension>

<Input in>
    Module im_msvistalog
    Query <QueryList> <Query Id="0"> <Select Path="Microsoft-Windows-Sysmon/Operational">*</Select> </Query></QueryList>
</Input>

<Output out>
    Module      om_udp
    Host        security-log.syslogserver.com
    Port        639
    Exec        to_syslog_snare();
</Output>

<Route 1>
    Path        in => out
</Route>

　Sysmon配置：

<Sysmon schemaversion="3.20">

  <!-- Capture all hashes -->

  <HashAlgorithms>*</HashAlgorithms>

  <EventFiltering>

    <!-- Log all drivers except if the signature -->

    <!-- contains Microsoft or Windows -->

    <DriverLoad onmatch="exclude">

      <Signature condition="contains">Microsoft</Signature>

      <Signature condition="contains">Windows</Signature>

    </DriverLoad>

    <ProcessTerminate onmatch="include" >

      <Image condition="end with">MsMpEng.exe</Image>

    </ProcessTerminate>

    <!-- Log network connection if the destination port equal 443 -->

    <!-- or 80, and process isn\'t InternetExplorer -->

    <!--NetworkConnect onmatch="include">

      <DestinationPort>443</DestinationPort>

      <DestinationPort>80</DestinationPort >

    </NetworkConnect -->

    <FileCreateTime onmatch="exclude" >

      <Image condition="end with">chrome.exe</Image>

    </FileCreateTime>

    <ImageLoad onmatch="include">

      <Signed condition="is">false</Signed>

    </ImageLoad>

    <!-- Log access rights for lsass.exe or winlogon.exe is not PROCESS_QUERY_INFORMATION -->

    <ProcessAccess onmatch="exclude">

      <GrantedAccess condition="is">0x1400</GrantedAccess>

    </ProcessAccess>

    <ProcessAccess onmatch="include">

      <TargetImage condition="end with">lsass.exe</TargetImage>

      <TargetImage condition="end with">winlogon.exe</TargetImage>

    </ProcessAccess>

    <NetworkConnect onmatch="exclude">

      <Image condition="end with">chrome.exe</Image>

      <SourcePort condition="is">137</SourcePort>

      <SourcePortName condition="is">llmnr</SourcePortName>

      <DestinationPortName condition="is">llmnr</DestinationPortName>

    </NetworkConnect>

    <CreateRemoteThread onmatch="include">

      <TargetImage condition="end with">explorer.exe</TargetImage>

      <TargetImage condition="end with">svchost.exe</TargetImage>

      <TargetImage condition="end with">winlogon.exe</TargetImage>

      <SourceImage condition="end with">powershell.exe</SourceImage>

    </CreateRemoteThread>

  </EventFiltering>

</Sysmon>

　　

 

 

测试案例：

安装：

－ sysmon -i config.conf 。   

－ nxlog双击运行，记得启动服务。（NXlog可命令行安装 msiexec /i  nxlog-ce-2.9.1716.msi  AGREETOLIECENSE="yes"    ACCEPT=YES  /qr+）

 

使用mimikatz抓取hash：

 

 

附NXlog完整配置样例：

## This is a basic configuration file for Windows Server 2008 * 2012 
## to GrayLog2 with GELF support and filtering.
## See the nxlog reference manual about the configuration options. 
## It should be installed locally and is also available
## online at http://nxlog.org/nxlog-docs/en/nxlog-reference-manual.html

## Please set the ROOT to the folder your nxlog was installed into,
## otherwise it will not start.

define ROOT C:\\Program Files (x86)\\nxlog
# define ROOT C:\\Program Files\\nxlog

Moduledir %ROOT%\\modules
CacheDir %ROOT%\\data
Pidfile %ROOT%\\data\\nxlog.pid
SpoolDir %ROOT%\\data
LogFile %ROOT%\\data\\nxlog.log

<Extension gelf>
    Module xm_gelf
</Extension>

<Input pr_mseventlog>
    Module      im_msvistalog
    ReadFromLast    True
    # http://msdn.microsoft.com/en-us/library/aa385231.aspx
    # http://msdn.microsoft.com/en-us/library/ff604025(v=office.14).aspx
    # Level 1 (ID=30  Critical)     severity level events
    # Level 2 (ID=40  Error)        severity level events
    # Level 3 (ID=50  Warning)      severity level events
    # Level 4 (ID=80  Information)  severity level events
    # Level 5 (ID=100 Verbose)      severity level events
    # All channels are included by default which are listed in the registry under these:
    # HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\WINEVT\\Channels 
    # HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\services\\eventlog\\System
    #
    # <Select Path=\'Key Management Service\'>*</Select></Query>\\
    # <Select Path=\'Internet Explorer\'>*</Select></Query>\\
    # <Select Path=\'HardwareEvents\'>*</Select></Query>\\
    #
    Query   <QueryList>\\
        <Query Id="0">\\
            <Select Path="Security">*</Select>\\
            <Select Path="System">*[System/Level=4]</Select>\\
            <Select Path="Application">*[Application/Level=2]</Select>\\
            <Select Path="Setup">*[System/Level=3]</Select>\\
            <Select Path=\'Windows PowerShell\'>*</Select>\\
        </Query>\\
    </QueryList>

    # REGEX EXAMPLES:
    # "\\s" equals one white space character, and ".*" equals any one char 
    # Line Contains both "bubble" and "gum"
    #   Search pattern: ^(?=.*?\\bbubble\\b)(?=.*?\\bgum\\b).*
    # Line does Not Contain "boy"
    #   Search pattern: ^(?!.*boy).*
    # Line Contains "bubble" but Neither "gum" Nor "bath"
    #   Search pattern: ^(?=.*bubble)(?!.*gum)(?!.*bath).*

    # Uncomment next line to view all logs, we can view output to help 
    # create the regex, next line shows my $raw_event data to parse:
    # 2013-11-18 15:23:02 INFO 2013-12-18 15:23:01 ahost.adomain.local INFO 62464 UVD Information
    # Exec   log_info($raw_event) ;
    Exec if ($raw_event =~ /INFO\\s+62464/) drop();

</Input>

<Output out>
    Module      om_udp
    Host        10.247.x.x
    Port        12201
    OutputType  GELF
</Output>

<Route 1>
    Path    pr_mseventlog  => out
</Route>

　　

参考：

http://www.freebuf.com/sectool/122779.html

https://technet.microsoft.com/en-us/sysinternals/dn798348

https://nxlog.co/docs/sysmon/audit-logging-on-windows-with-sysmon-and-nxlog.html

http://www.ilanni.com/?p=595