Enabling ASM for .NET

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You can monitor application security for .NET apps running in Docker, Kubernetes, Amazon ECS, and AWS Fargate.

前提条件

1 クリック有効化
サービスがリモート構成を有効にした Agent とそれをサポートするトレーシングライブラリのバージョンで実行されている場合、ASM Status 列の Not Enabled インジケーターにカーソルを合わせ、Enable ASM をクリックします。DD_APPSEC_ENABLED=true または --enable-appsec のフラグを使ってサービスを再起動する必要はありません。

Enabling threat detection

Get started

  1. Update your Datadog .NET library to at least version 2.2.0 (at least version 2.16.0 for Software Composition Analysis detection features) for your target operating system architecture.

    To check that your service’s language and framework versions are supported for ASM capabilities, see Compatibility.

  2. Enable ASM by setting the DD_APPSEC_ENABLED environment variable to true. For example, on Windows self-hosted, run the following PowerShell snippet as part of your application start up script:

    $target=[System.EnvironmentVariableTarget]::Process
[System.Environment]::SetEnvironmentVariable("DD_APPSEC_ENABLED","true",$target)

    Or one of the following methods, depending on where your application runs:

    In a Windows console:

    rem Set environment variables
SET CORECLR_ENABLE_PROFILING=1
SET CORECLR_PROFILER={846F5F1C-F9AE-4B07-969E-05C26BC060D8}
SET DD_APPSEC_ENABLED=true

rem Start application
dotnet.exe example.dll

    Run the following PowerShell command as administrator to configure the necessary environment variables in the registry HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment and restart IIS.

    $target=[System.EnvironmentVariableTarget]::Machine
[System.Environment]::SetEnvironmentVariable("DD_APPSEC_ENABLED","true",$target)
net stop was /y
net start w3svc

    Or, for IIS services exclusively, on WAS and W3SVC with Powershell as an administrator, run:

    $appsecPart = "DD_APPSEC_ENABLED=true"
[string[]] $defaultvariable = @("CORECLR_ENABLE_PROFILING=1", "CORECLR_PROFILER={846F5F1C-F9AE-4B07-969E-05C26BC060D8}", $appsecPart)

function Add-AppSec {

    param (
        $path
    )
    $v = (Get-ItemProperty -Path $path).Environment
    If ($v -eq $null) {
        Set-ItemProperty -Path $path -Name "Environment" -Value $defaultvariable
    }
    ElseIf (-not ($v -match $appsecPart)) {
        $v += " " + $appsecPart;
        Set-ItemProperty -Path $path -Name "Environment" -Value $v
    }
}
Add-AppSec -path "HKLM:SYSTEM\CurrentControlSet\Services\WAS\"
Add-AppSec -path "HKLM:SYSTEM\CurrentControlSet\Services\W3SVC\"

net stop was /y
net start w3svc

    Or, to avoid editing registry keys, edit the application settings in the web.config file of your application:

    <configuration>
  <appSettings>
        <add key="DD_APPSEC_ENABLED" value="true"/>
  </appSettings>
</configuration>

    This can also be done at the IIS application pools level in the applicationHost.config file, usually in C:\Windows\System32\inetsrv\config\:

    <system.applicationHost>

    <applicationPools>
        <add name="DefaultAppPool">
            <environmentVariables>
                <add name="DD_APPSEC_ENABLED" value="true" />
            </environmentVariables>
            (...)

    Add the following to your application configuration:

    DD_APPSEC_ENABLED=true

    Update your configuration container for APM by adding the following argument in your docker run command:

    docker run [...] -e DD_APPSEC_ENABLED=true [...]

    Add the following environment variable value to your container Dockerfile:

    ENV DD_APPSEC_ENABLED=true

    Update your deployment configuration file for APM and add the ASM environment variable:

    spec:
  template:
    spec:
      containers:
        - name: <CONTAINER_NAME>
          image: <CONTAINER_IMAGE>/<TAG>
          env:
            - name: DD_APPSEC_ENABLED
              value: "true"

    Update your ECS task definition JSON file, by adding this in the environment section:

    "environment": [
  ...,
  {
    "name": "DD_APPSEC_ENABLED",
    "value": "true"
  }
]

    Add the following line to your container Dockerfile:

    ENV DD_APPSEC_ENABLED=true

  3. Restart the application using a full stop and start.

    この構成が完了すると、ライブラリは、アプリケーションからセキュリティデータを収集し、Agent に送信します。Agent は、そのデータを Datadog に送信し、すぐに使える検出ルールによって、攻撃者のテクニックや潜在的な誤構成にフラグが立てられるため、是正措置を講じることができます。

  4. Application Security Management の脅威検出の動作を見るには、既知の攻撃パターンをアプリケーションに送信してください。例えば、次の curl スクリプトを含むファイルを実行して、Security Scanner Detected ルールをトリガーします。

    for ((i=1;i<=250;i++)); 
    do
    # Target existing service’s routes
    curl https://your-application-url/existing-route -A dd-test-scanner-log;
    # Target non existing service’s routes
    curl https://your-application-url/non-existing-route -A dd-test-scanner-log;
    done

    注: dd-test-scanner-log の値は、最新のリリースでサポートされています。

    アプリケーションを有効にして実行すると、数分後に Application Signals Explorer に脅威情報が表示され、Vulnerability Explorer に脆弱性情報が表示されます**。

Further Reading

お役に立つドキュメント、リンクや記事:

Adding user information to tracesDOCUMENTATION more more .NET Datadog library source codeSOURCE CODE more more OOTB Application Security Management RulesDOCUMENTATION more more Troubleshooting Application Security ManagementDOCUMENTATION more more