通过 Internet Explorer 的潜在命令和控制

编辑

通过 Internet Explorer 的潜在命令和控制编辑

识别通过组件对象模型 (COM) 启动的 Internet Explorer (iexplore.exe) 实例,这些实例建立了不寻常的网络连接。攻击者可以通过 COM 滥用 Internet Explorer,以避免可疑进程建立网络连接并绕过基于主机的防火墙限制。

规则类型: eql

规则索引:

  • logs-endpoint.events.library-*
  • logs-endpoint.events.process-*
  • logs-endpoint.events.network-*

严重性: 中等

风险评分: 47

每隔运行: 5m

从以下时间开始搜索索引: now-9m(日期数学格式,另请参见 其他回溯时间

每次执行的最大警报数: 100

参考: 无

标签:

  • 域:端点
  • 操作系统:Windows
  • 用例:威胁检测
  • 策略:命令和控制
  • 数据源:Elastic Defend

版本: 106

规则作者:

  • Elastic

规则许可证: Elastic 许可证 v2

规则查询编辑

sequence by host.id, user.name with maxspan = 5s
  [library where host.os.type == "windows" and dll.name : "IEProxy.dll" and process.name : ("rundll32.exe", "regsvr32.exe")]
  [process where host.os.type == "windows" and event.type == "start" and process.parent.name : "iexplore.exe" and process.parent.args : "-Embedding"]
  /* IE started via COM in normal conditions makes few connections, mainly to Microsoft and OCSP related domains, add FPs here */
  [network where host.os.type == "windows" and network.protocol == "dns" and process.name : "iexplore.exe" and
   not dns.question.name :
   (
    "*.microsoft.com",
    "*.digicert.com",
    "*.msocsp.com",
    "*.windowsupdate.com",
    "*.bing.com",
    "*.identrust.com",
    "*.sharepoint.com",
    "*.office365.com",
    "*.office.com"
    )
  ] /* with runs=5 */

框架: MITRE ATT&CKTM