Sentinel KQL查询从syslog数据中提取JSON(源代码为CSW / Tetration)

new9mtju 于 2023-05-30 发布在其他

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以下是从Cisco Secure Workload（以前称为Tetration）进入Sentinel的系统日志消息示例：

Alert[11]: [WARNING] {"keyId":"SEN::u0mvypu37b9fwimpr4zn168c2ht159n6xdhwtaanm-upgrade_srv_check_in","eventTime":"1684974923000","alertTime":"1684974949559","alertText":"Agent Inactive: centos7","severity":"MEDIUM","tenantId":"000457","type":"SENSOR","alertDetails":"{\"details\":{\"AgentType\":\"ENFORCER\",\"Bios\":\"57D84D56-0000-0000-7E3C-9DD10F02AFD5\",\"CurrentVersion\":\"3.7.1.40-enforcer\",\"DesiredVersion\":\"\",\"HostName\":\"centos7\",\"IP\":\"1.1.1.1 (Gateway IP)\",\"LastConfigFetchAt\":\"2023-05-03 15:47:53 +0000 UTC\",\"Platform\":\"CentOS-7.9\"},\"agent_uuid\":\"u0mvypu37b9fwimpr4zn168c2ht159n6xdhwtaanm\",\"scope_name\":\"MYLAB\",\"scope_id\":\"f5qeybblv5oktpnte4ccrf5pw\",\"vrf_id\":700457}","rootScopeId":"f5qeybblv5oktpnte4ccrf5pw"}

需要帮助解析此文件，因为当前没有此产品的解析器。看起来有JSON的参与，但不确定我是否应该使用extractjson或parse_json。
我已经启动了下面的查询，但是我在提取/过滤值时遇到了麻烦（可能是因为这个查询中缺少JSON解析）：

Syslog
| where ProcessName contains "Tetration"
| extend AlertID = extract(????, 1, SyslogMessage) 
| extend Severity = extract(????,1, SyslogMessage)
| extend TenantID = extract(????, 1, SyslogMessage)
| extend IP = extract(????, 1, SyslogMessage)
| extend ScopeName = extract(????, 1, SyslogMessage)

社区可以提供的任何帮助都将不胜感激。

JSON

来源：https://stackoverflow.com/questions/76335967/sentinel-kql-query-to-extract-json-from-syslog-data-source-is-csw-tetration

2条答案

按热度按时间

nxowjjhe1#

您可以使用以下组合：

例如：

print input = ```Alert[11]: [WARNING] {"keyId":"SEN::u0mvypu37b9fwimpr4zn168c2ht159n6xdhwtaanm-upgrade_srv_check_in","eventTime":"1684974923000","alertTime":"1684974949559","alertText":"Agent Inactive: centos7","severity":"MEDIUM","tenantId":"000457","type":"SENSOR","alertDetails":"{\"details\":{\"AgentType\":\"ENFORCER\",\"Bios\":\"57D84D56-0000-0000-7E3C-9DD10F02AFD5\",\"CurrentVersion\":\"3.7.1.40-enforcer\",\"DesiredVersion\":\"\",\"HostName\":\"centos7\",\"IP\":\"1.1.1.1 (Gateway IP)\",\"LastConfigFetchAt\":\"2023-05-03 15:47:53 +0000 UTC\",\"Platform\":\"CentOS-7.9\"},\"agent_uuid\":\"u0mvypu37b9fwimpr4zn168c2ht159n6xdhwtaanm\",\"scope_name\":\"MYLAB\",\"scope_id\":\"f5qeybblv5oktpnte4ccrf5pw\",\"vrf_id\":700457}","rootScopeId":"f5qeybblv5oktpnte4ccrf5pw"}```
| extend start_position = indexof(input, "{")
| extend input = parse_json(substring(input, start_position))
| project
    AlertID = input.keyId,
    Severity = input.severity,
    TenantID = input.tenantId,
    AlertDetails = parse_json(tostring(input.alertDetails))
| extend
    IP = AlertDetails.details.IP,
    ScopeName = AlertDetails.scope_name
| project-away AlertDetails

| 警报ID|严重程度|租户ID| IP|作用域名称|
| - -----|- -----|- -----|- -----|- -----|
| SEN：：u0mvypu37b9fwimpr4zn168c2ht159n6xdhwtaanm-upgrade_srv_check_in|中等|000457|1.1.1.1（网关IP）|MYLAB|
或者，您可以使用parse operator：

print input = ```Alert[11]: [WARNING] {"keyId":"SEN::u0mvypu37b9fwimpr4zn168c2ht159n6xdhwtaanm-upgrade_srv_check_in","eventTime":"1684974923000","alertTime":"1684974949559","alertText":"Agent Inactive: centos7","severity":"MEDIUM","tenantId":"000457","type":"SENSOR","alertDetails":"{\"details\":{\"AgentType\":\"ENFORCER\",\"Bios\":\"57D84D56-0000-0000-7E3C-9DD10F02AFD5\",\"CurrentVersion\":\"3.7.1.40-enforcer\",\"DesiredVersion\":\"\",\"HostName\":\"centos7\",\"IP\":\"1.1.1.1 (Gateway IP)\",\"LastConfigFetchAt\":\"2023-05-03 15:47:53 +0000 UTC\",\"Platform\":\"CentOS-7.9\"},\"agent_uuid\":\"u0mvypu37b9fwimpr4zn168c2ht159n6xdhwtaanm\",\"scope_name\":\"MYLAB\",\"scope_id\":\"f5qeybblv5oktpnte4ccrf5pw\",\"vrf_id\":700457}","rootScopeId":"f5qeybblv5oktpnte4ccrf5pw"}```
| parse input with "Alert[" AlertId "]: [" Severity "] " input:dynamic
| project
    AlertId,
    Severity = input.severity,
    TenantID = input.tenantId,
    AlertDetails = parse_json(tostring(input.alertDetails))
| extend
    IP = AlertDetails.details.IP,
    ScopeName = AlertDetails.scope_name
| project-away AlertDetails

| 警报ID|严重程度|租户ID| IP|作用域名称|
| - -----|- -----|- -----|- -----|- -----|
| 十一|中等|000457|1.1.1.1（网关IP）|MYLAB|

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pxy2qtax2#

谢谢Yoni。下面是我在Sentinel中使用的完整查询（仍在测试，但看起来不错）。

Syslog 
| where ProcessName contains "Tetration"
| take 10
| parse SyslogMessage with "Alert[" AlertId "]: [" Severity "] " input:dynamic
| project
    AlertId,
    AlertText = input.alertText,
    Severity = input.severity,
    TenantID = input.tenantId,
    Type = input.type,
    AlertDetails = parse_json(tostring(input.alertDetails))
| extend
    Host_Name = AlertDetails.details.HostName,
    IP = AlertDetails.details.IP,
    Scope_Name = AlertDetails.scope_name,
    Version = AlertDetails.details.CurrentVersion,
    OS = AlertDetails.details.Platform,
    Agent_ID = AlertDetails.agent_uuid,
    Scope_ID = AlertDetails.scope_id,
    VRF_ID = AlertDetails.vrf_id
| project-away AlertDetails

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Sentinel KQL查询从syslog数据中提取JSON(源代码为CSW / Tetration)

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