通过 Microsoft Office 加载项的可疑执行

编辑

通过 Microsoft Office 加载项的可疑执行

编辑

识别常见 Microsoft Office 应用程序的执行以从可疑路径或具有异常父进程的 Office 加载项启动。这可能表明尝试通过恶意网络钓鱼 MS Office 加载项获取初始访问权限。

规则类型: eql

规则索引:

  • winlogbeat-*
  • logs-endpoint.events.process-*
  • logs-windows.sysmon_operational-*
  • endgame-*
  • logs-m365_defender.event-*
  • logs-sentinel_one_cloud_funnel.*

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,另请参阅 其他回溯时间)

每次执行的最大告警数: 100

参考:

标签:

  • 域:端点
  • 操作系统:Windows
  • 用例:威胁检测
  • 战术:初始访问
  • 战术:持久性
  • 数据源:Elastic Endgame
  • 数据源:Elastic Defend
  • 数据源:Sysmon
  • 数据源:Microsoft Defender for Endpoint
  • 数据源:SentinelOne

版本: 205

规则作者:

  • Elastic

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.name : ("WINWORD.EXE", "EXCEL.EXE", "POWERPNT.EXE", "MSACCESS.EXE", "VSTOInstaller.exe") and

    process.args regex~ """.+\.(wll|xll|ppa|ppam|xla|xlam|vsto)""" and

    /* Office Add-In from suspicious paths */
    (process.args :
             ("?:\\Users\\*\\Temp\\7z*",
              "?:\\Users\\*\\Temp\\Rar$*",
              "?:\\Users\\*\\Temp\\Temp?_*",
              "?:\\Users\\*\\Temp\\BNZ.*",
              "?:\\Users\\*\\Downloads\\*",
              "?:\\Users\\*\\AppData\\Roaming\\*",
              "?:\\Users\\Public\\*",
              "?:\\ProgramData\\*",
              "?:\\Windows\\Temp\\*",
              "\\Device\\*",
              "http*") or

    process.parent.name : ("explorer.exe", "OpenWith.exe") or

    /* Office Add-In from suspicious parent */
    process.parent.name : ("cmd.exe", "powershell.exe")) and

    /* False Positives */
    not (process.args : "*.vsto" and
         process.parent.executable :
                   ("?:\\Program Files\\Logitech\\LogiOptions\\PlugInInstallerUtility*.exe",
                    "?:\\ProgramData\\Logishrd\\LogiOptions\\Plugins\\VSTO\\*\\VSTOInstaller.exe",
                    "?:\\Program Files\\Logitech\\LogiOptions\\PlugInInstallerUtility.exe",
                    "?:\\Program Files\\LogiOptionsPlus\\PlugInInstallerUtility*.exe",
                    "?:\\ProgramData\\Logishrd\\LogiOptionsPlus\\Plugins\\VSTO\\*\\VSTOInstaller.exe",
                    "?:\\Program Files\\Common Files\\microsoft shared\\VSTO\\*\\VSTOInstaller.exe")) and
    not (process.args : "/Uninstall" and process.name : "VSTOInstaller.exe") and
    not (process.parent.name : "rundll32.exe" and
         process.parent.args : "?:\\WINDOWS\\Installer\\MSI*.tmp,zzzzInvokeManagedCustomActionOutOfProc") and
    not (process.name : "VSTOInstaller.exe" and process.args : "https://dl.getsidekick.com/outlook/vsto/Sidekick.vsto")

框架: MITRE ATT&CKTM