Microsoft Exchange Server UM 产生可疑进程

编辑

Microsoft Exchange Server UM 产生可疑进程

编辑

识别由 Microsoft Exchange Server 统一消息 (UM) 服务产生的可疑进程。此活动已被观察到利用 CVE-2021-26857。

规则类型: eql

规则索引:

  • logs-endpoint.events.process-*
  • winlogbeat-*
  • logs-windows.forwarded*
  • logs-windows.sysmon_operational-*
  • endgame-*
  • logs-system.security*
  • logs-m365_defender.event-*
  • logs-sentinel_one_cloud_funnel.*
  • logs-crowdstrike.fdr*

严重性: 中等

风险评分: 47

每隔: 5 分钟

搜索索引自: 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

参考资料:

标签:

  • 领域:端点
  • 操作系统:Windows
  • 用例:威胁检测
  • 策略:初始访问
  • 策略:横向移动
  • 数据源:Elastic Endgame
  • 用例:漏洞
  • 数据源:Elastic Defend
  • 数据源:系统
  • 数据源:Microsoft Defender for Endpoint
  • 数据源:Sysmon
  • 数据源:SentinelOne
  • 数据源:Crowdstrike

版本: 311

规则作者:

  • Elastic
  • Austin Songer

规则许可证: Elastic License v2

规则查询

编辑
process where host.os.type == "windows" and event.type == "start" and
  process.parent.name : ("UMService.exe", "UMWorkerProcess.exe") and
    not process.executable : (
          "?:\\Windows\\System32\\werfault.exe",
          "?:\\Windows\\System32\\wermgr.exe",
          "?:\\Program Files\\Microsoft\\Exchange Server\\V??\\Bin\\UMWorkerProcess.exe",
          "?:\\Program Files\\Microsoft\\Exchange Server\\Bin\\UMWorkerProcess.exe",
          "D:\\Exchange 2016\\Bin\\UMWorkerProcess.exe",
          "E:\\ExchangeServer\\Bin\\UMWorkerProcess.exe",
          "D:\\Exchange\\Bin\\UMWorkerProcess.exe",
          "D:\\Exchange Server\\Bin\\UMWorkerProcess.exe",
          "E:\\Exchange Server\\V15\\Bin\\UMWorkerProcess.exe",
          "\\Device\\HarddiskVolume?\\Windows\\System32\\werfault.exe",
          "\\Device\\HarddiskVolume?\\Windows\\System32\\wermgr.exe",
          "\\Device\\HarddiskVolume?\\Program Files\\Microsoft\\Exchange Server\\V??\\Bin\\UMWorkerProcess.exe",
          "\\Device\\HarddiskVolume?\\Program Files\\Microsoft\\Exchange Server\\Bin\\UMWorkerProcess.exe",
          "\\Device\\HarddiskVolume?\\Exchange 2016\\Bin\\UMWorkerProcess.exe",
          "\\Device\\HarddiskVolume?\\ExchangeServer\\Bin\\UMWorkerProcess.exe",
          "\\Device\\HarddiskVolume?\\Exchange\\Bin\\UMWorkerProcess.exe",
          "\\Device\\HarddiskVolume?\\Exchange Server\\Bin\\UMWorkerProcess.exe",
          "\\Device\\HarddiskVolume?\\Exchange Server\\V15\\Bin\\UMWorkerProcess.exe"
    )

框架: MITRE ATT&CKTM