通过 DllHost 的异常网络连接

编辑

识别 dllhost.exe 发起出站网络连接的异常实例。这可能表示存在攻击者的命令和控制活动。

规则类型: eql

规则索引:

  • winlogbeat-*
  • logs-endpoint.events.process-*
  • logs-endpoint.events.network-*
  • logs-windows.sysmon_operational-*

严重性: 中

风险评分: 47

运行频率: 5 分钟

搜索索引起始时间: now-9m (Date Math 格式,另请参阅 额外回溯时间)

每次执行的最大警报数: 100

参考:

标签:

  • 域: 端点
  • 操作系统: Windows
  • 用例: 威胁检测
  • 战术: 防御规避
  • 数据源: Elastic Defend
  • 数据源: Sysmon

版本: 207

规则作者:

  • Elastic

规则许可: Elastic License v2

规则查询

编辑
sequence by host.id, process.entity_id with maxspan=1m
  [process where host.os.type == "windows" and event.type == "start" and process.name : "dllhost.exe" and process.args_count == 1]
  [network where host.os.type == "windows" and process.name : "dllhost.exe" and
   not cidrmatch(destination.ip, "10.0.0.0/8", "127.0.0.0/8", "169.254.0.0/16", "172.16.0.0/12", "192.0.0.0/24",
    "192.0.0.0/29", "192.0.0.8/32", "192.0.0.9/32", "192.0.0.10/32", "192.0.0.170/32", "192.0.0.171/32", "192.0.2.0/24",
    "192.31.196.0/24", "192.52.193.0/24", "192.168.0.0/16", "192.88.99.0/24", "224.0.0.0/4", "100.64.0.0/10",
    "192.175.48.0/24", "198.18.0.0/15", "198.51.100.0/24", "203.0.113.0/24", "240.0.0.0/4", "::1", "FE80::/10",
    "FF00::/8")]

框架: MITRE ATT&CKTM