通过 Outlook 进行可疑进程间通信

编辑

通过 Outlook 进行可疑进程间通信编辑

通过组件对象模型从异常进程检测与 Outlook 的进程间通信。攻击者可能针对用户电子邮件收集敏感信息,或通过 API 代表用户发送电子邮件。

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 分钟运行一次

从以下时间起搜索索引: now-9m (日期数学格式,另请参见 附加回溯时间)

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
  • 策略:收集
  • 数据源:Elastic Defend

版本: 7

规则作者:

  • Elastic

规则许可证: Elastic 许可证 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