通过 Outlook 的可疑进程间通信

编辑

检测通过组件对象模型 (Component Object Model) 从异常进程与 Outlook 进行进程间通信的情况。攻击者可能会以用户电子邮件为目标,收集敏感信息或通过 API 代表他们发送电子邮件。

规则类型: eql

规则索引:

  • logs-endpoint.events.process*

严重性: 中等

风险评分: 47

每隔: 5 分钟

搜索索引时间范围: now-9m (日期数学格式,另请参见 额外回溯时间)

每次执行的最大告警数: 100

参考:

标签:

  • 领域:终端
  • 操作系统:Windows
  • 用例:威胁检测
  • 战术:收集
  • 数据源:Elastic Defend

版本: 7

规则作者:

  • Elastic

规则许可证: Elastic License v2

规则查询

编辑
sequence with maxspan=1m
[process where host.os.type == "windows" and event.action == "start" and
  (
    process.name : (
      "rundll32.exe", "mshta.exe", "powershell.exe", "pwsh.exe",
      "cmd.exe", "regsvr32.exe", "cscript.exe", "wscript.exe"
    ) or
    (
      (process.code_signature.trusted == false or process.code_signature.exists == false) and
      (process.Ext.relative_file_creation_time <= 500 or process.Ext.relative_file_name_modify_time <= 500)
    )
  )
] by process.entity_id
[process where host.os.type == "windows" and event.action == "start" and process.name : "OUTLOOK.EXE" and
  process.Ext.effective_parent.name != null] by process.Ext.effective_parent.entity_id

框架: MITRE ATT&CKTM