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可疑通信应用程序子进程

编辑

可疑通信应用程序子进程

编辑

识别通信应用程序的可疑子进程，这可能表明潜在的伪装成通信应用程序的行为，或应用程序上的漏洞被利用导致执行代码。

规则类型: eql

规则索引:

logs-endpoint.events.process-*

严重性: 低

风险评分: 21

运行频率: 5 分钟

搜索索引时间范围: now-9m (日期数学格式，另见 额外回溯时间)

每次执行的最大告警数: 100

参考: 无

标签:

领域: 端点
操作系统: Windows
用例: 威胁检测
策略: 防御规避
策略: 持久性
规则类型: BBR
数据源: Elastic Defend

版本: 5

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
  (
    /* Slack */
    (process.parent.name : "slack.exe" and not
      (
        (
          process.executable : (
            "?:\\Program Files\\*",
            "?:\\Program Files (x86)\\*",
            "?:\\Users\\*\\AppData\\Local\\Google\\Chrome\\Application\\chrome.exe",
            "?:\\Users\\*\\AppData\\Local\\Island\\Island\\Application\\Island.exe",
            "?:\\Users\\*\\AppData\\Roaming\\Zoom\\bin*\\Zoom.exe",
            "?:\\Windows\\System32\\rundll32.exe",
            "?:\\Users\\*\\AppData\\Local\\Mozilla Firefox\\firefox.exe",
            "?:\\Windows\\System32\\notepad.exe",
            "?:\\Windows\\System32\\WerFault.exe",
            "?:\\Windows\\SysWOW64\\WerFault.exe",
            "?:\\Users\\*\\AppData\\Local\\Programs\\Opera\\opera.exe"
          ) and process.code_signature.trusted == true
        ) or
        (
          process.code_signature.subject_name : (
            "Slack Technologies, Inc.",
            "Slack Technologies, LLC"
          ) and process.code_signature.trusted == true
        ) or
        (
          (process.name : "powershell.exe" and process.command_line : "powershell.exe -c Invoke-WebRequest -Uri https://slackb.com/*") or
          (process.name : "cmd.exe" and process.command_line : "C:\\WINDOWS\\system32\\cmd.exe /d /s /c \"%windir%\\System32\\rundll32.exe User32.dll,SetFocus 0\"")
        )
      )
    ) or

    /* WebEx */
    (process.parent.name : ("CiscoCollabHost.exe", "WebexHost.exe") and not
      (
        (
          process.executable : (
            "?:\\Program Files\\*",
            "?:\\Program Files (x86)\\*",
            "?:\\Windows\\System32\\WerFault.exe",
            "?:\\Users\\*\\AppData\\Local\\Google\\Chrome\\Application\\chrome.exe",
            "?:\\Users\\*\\AppData\\Local\\Mozilla Firefox\\firefox.exe",
            "?:\\Users\\*\\AppData\\Local\\Programs\\Opera\\opera.exe"
          ) and process.code_signature.trusted == true
        ) or
        (
          process.code_signature.subject_name : (
            "Cisco Systems, Inc.",
            "Cisco WebEx LLC",
            "Cisco Systems Inc."
          ) and process.code_signature.trusted == true
        )
      )
    ) or

    /* Teams */
    (process.parent.name : "Teams.exe" and not
      (
        (
          process.executable : (
            "?:\\Program Files\\*",
            "?:\\Program Files (x86)\\*",
            "?:\\Windows\\System32\\WerFault.exe",
            "?:\\Windows\\SysWOW64\\WerFault.exe",
            "?:\\Windows\\BrowserCore\\BrowserCore.exe",
            "?:\\Users\\*\\AppData\\Local\\Google\\Chrome\\Application\\chrome.exe",
            "?:\\Users\\*\\AppData\\Local\\Mozilla Firefox\\firefox.exe"
          ) and process.code_signature.trusted == true
        ) or
        (
          process.code_signature.subject_name : (
            "Microsoft Corporation",
            "Microsoft 3rd Party Application Component"
          ) and process.code_signature.trusted == true
        ) or
        (
          (process.name : "taskkill.exe" and process.args : "Teams.exe")
        )
      )
    ) or

    /* Discord */
    (process.parent.name : "Discord.exe" and not
      (
        (
          process.executable : (
            "?:\\Program Files\\*",
            "?:\\Program Files (x86)\\*",
            "?:\\Users\\*\\AppData\\Local\\Google\\Chrome\\Application\\chrome.exe",
            "?:\\Windows\\System32\\reg.exe",
            "?:\\Windows\\SysWOW64\\reg.exe",
            "?:\\Windows\\System32\\WerFault.exe",
            "?:\\Windows\\SysWOW64\\WerFault.exe"
          ) and process.code_signature.trusted == true
        ) or
        (
          process.code_signature.subject_name : (
            "Discord Inc."
          ) and process.code_signature.trusted == true
        ) or
        (
          process.name : "cmd.exe" and
          (
            process.command_line : (
              "C:\\WINDOWS\\system32\\cmd.exe /d /s /c \"chcp\"",
              "C:\\WINDOWS\\system32\\cmd.exe /q /d /s /c \"C:\\Program^ Files\\NVIDIA^ Corporation\\NVSMI\\nvidia-smi.exe\""
            ) or
            process.args : (
              "C:\\WINDOWS/System32/nvidia-smi.exe",
              "C:\\WINDOWS\\System32\\nvidia-smi.exe",
              "C:\\Windows\\System32\\DriverStore\\FileRepository/*/nvidia-smi.exe*"
            )
          )
        )
      )
    ) or

    /* WhatsApp */
    (process.parent.name : "Whatsapp.exe" and not
      (
        (
          process.executable : (
            "?:\\Program Files\\*",
            "?:\\Program Files (x86)\\*",
            "?:\\Windows\\System32\\WerFault.exe",
            "?:\\Windows\\System32\\reg.exe",
            "?:\\Windows\\SysWOW64\\reg.exe"
          ) and process.code_signature.trusted == true
        ) or
        (
          process.code_signature.subject_name : (
            "WhatsApp LLC",
            "WhatsApp, Inc",
            "24803D75-212C-471A-BC57-9EF86AB91435"
          ) and process.code_signature.trusted == true
        ) or
        (
          (process.name : "cmd.exe" and process.command_line : "C:\\Windows\\system32\\cmd.exe /d /s /c \"C:\\Windows\\system32\\wbem\\wmic.exe*")
        )
      )
    ) or

    /* Zoom */
    (process.parent.name : "Zoom.exe" and not
      (
        (
          process.executable : (
            "?:\\Program Files\\*",
            "?:\\Program Files (x86)\\*",
            "?:\\Users\\*\\AppData\\Local\\Google\\Chrome\\Application\\chrome.exe",
            "?:\\Users\\*\\AppData\\Local\\Island\\Island\\Application\\Island.exe",
            "?:\\Users\\*\\AppData\\Local\\Mozilla Firefox\\firefox.exe",
            "?:\\Windows\\System32\\WerFault.exe"
          ) and process.code_signature.trusted == true
        ) or
        (
          process.code_signature.subject_name : (
            "Zoom Video Communications, Inc."
          ) and process.code_signature.trusted == true
        )
      )
    ) or

    /* Outlook */
    (process.parent.name : "outlook.exe" and not
      (
        (
          process.executable : (
            "?:\\Program Files\\*",
            "?:\\Program Files (x86)\\*",
            "?:\\Windows\\System32\\WerFault.exe",
            "?:\\Windows\\SysWOW64\\WerFault.exe",
            "?:\\Windows\\system32\\wermgr.exe",
            "?:\\Users\\*\\AppData\\Local\\Microsoft\\Teams\\current\\Teams.exe",
            "?:\\Users\\*\\AppData\\Local\\Temp\\NewOutlookInstall\\NewOutlookInstaller.exe",
            "?:\\Users\\*\\AppData\\Local\\Google\\Chrome\\Application\\chrome.exe",
            "?:\\Users\\*\\AppData\\Local\\Island\\Island\\Application\\Island.exe",
            "?:\\Users\\*\\AppData\\Local\\Mozilla Firefox\\firefox.exe",
            "?:\\Users\\*\\AppData\\Roaming\\Zoom\\bin\\Zoom.exe",
            "?:\\Windows\\System32\\IME\\SHARED\\IMEWDBLD.EXE",
            "?:\\Windows\\System32\\spool\\drivers\\x64\\*",
            "?:\\Windows\\System32\\prevhost.exe",
            "?:\\Windows\\System32\\dwwin.exe",
            "?:\\Windows\\System32\\mspaint.exe",
            "?:\\Windows\\SysWOW64\\mspaint.exe",
            "?:\\Windows\\System32\\notepad.exe",
            "?:\\Windows\\SysWOW64\\notepad.exe",
            "?:\\Windows\\System32\\smartscreen.exe",
            "?:\\Windows\\explorer.exe",
            "?:\\Windows\\splwow64.exe"
          ) and process.code_signature.trusted == true
        ) or
        (
          process.name : "rundll32.exe" and
          process.args : "*hpmsn???.dll,MonitorPrintJobStatus*"
        )
      )
    ) or

    /* Thunderbird */
    (process.parent.name : "thunderbird.exe" and not
      (
        (
          process.executable : (
            "?:\\Program Files\\*",
            "?:\\Program Files (x86)\\*",
            "?:\\Windows\\System32\\WerFault.exe",
            "?:\\Windows\\splwow64.exe"
          ) and process.code_signature.trusted == true
        ) or
        (
          process.code_signature.subject_name : (
            "Mozilla Corporation"
          ) and process.code_signature.trusted == true
        )
      )
    )
  )

框架: MITRE ATT&CK^TM

策略
- 名称: 防御规避
- ID: TA0005
- 参考网址: https://attack.mitre.org/tactics/TA0005/
技术
- 名称: 伪装
- ID: T1036
- 参考网址: https://attack.mitre.org/techniques/T1036/
子技术
- 名称: 无效代码签名
- ID: T1036.001
- 参考网址: https://attack.mitre.org/techniques/T1036/001/
子技术
- 名称: 匹配合法名称或位置
- ID: T1036.005
- 参考网址: https://attack.mitre.org/techniques/T1036/005/
技术
- 名称: 进程注入
- ID: T1055
- 参考网址: https://attack.mitre.org/techniques/T1055/
策略
- 名称: 持久性
- ID: TA0003
- 参考网址: https://attack.mitre.org/tactics/TA0003/
技术
- 名称: 危害主机软件二进制文件
- ID: T1554
- 参考网址: https://attack.mitre.org/techniques/T1554/

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