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Suricata 8.0 的 DNS EVE 日志变更¶
Suricata 8.0 将 dns
和 alert
记录中的 DNS 日志格式修改为版本 3
。这些变更解决了 DNS 响应告警中信息不足的问题,同时统一了 dns
和 alert
对象中 dns
结构的格式。
工单: https://redmine.openinfosecfoundation.org/issues/6281
此外,版本 3
的 DNS 响应消息现在会将响应者的 IP 地址作为 src_ip
,而非客户端 IP。工单:
https://redmine.openinfosecfoundation.org/issues/6400
主要变更总结如下:
DNS 请求的类型现在使用
request
替代query
。DNS 响应的类型现在使用
response
替代answer
。DNS 请求现在会将多个查询记录在一个数组中,而不是像之前那样在请求包含多个查询时生成多条请求事件。该特性已在作为
alert
记录的 DNS 请求中实现。7.0
8.0
{ "event_type": "dns", "dns": { "type": "query", "id": 0, "rrname": "www.suricata.io", "rrtype": "A", "tx_id": 0, "opcode": 0 } }
{ "event_type": "dns", "dns": { "version": 3, "type": "request", "tx_id": 0, "id": 0, "flags": "100", "rd": true, "opcode": 0, "rcode": "NOERROR", "queries": [ { "rrname": "www.suricata.io", "rrtype": "A" } ] } }
DNS 响应现在将查询记录在
queries
数组中,而非直接将首个rrname
和rrtype
记录在dns
对象内。7.0
8.0
{ "event_type": "dns", "dns": { "version": 2, "type": "answer", "id": 0, "flags": "8180", "qr": true, "rd": true, "ra": true, "opcode": 0, "rrname": "www.suricata.io", "rrtype": "A", "rcode": "NOERROR", "answers": [ { "rrname": "www.suricata.io", "rrtype": "CNAME", "ttl": 3597, "rdata": "suricata.io" }, { "rrname": "suricata.io", "rrtype": "A", "ttl": 597, "rdata": "35.212.0.44" } ] } }
{ "event_type": "dns", "dns": { "version": 3, "type": "response", "tx_id": 1, "id": 0, "flags": "8180", "qr": true, "rd": true, "ra": true, "opcode": 0, "rcode": "NOERROR", "queries": [ { "rrname": "www.suricata.io", "rrtype": "A" } ], "answers": [ { "rrname": "www.suricata.io", "rrtype": "CNAME", "ttl": 3597, "rdata": "suricata.io" }, { "rrname": "suricata.io", "rrtype": "A", "ttl": 597, "rdata": "35.212.0.44" } ], } }
告警对象中的 DNS 请求现在会将
answers
记录为数组。格式参见上方 8.0 示例。dns
对象现在在 DNS 请求、响应以及alert
记录中保持统一。DNS 请求告警示例
7.0
8.0
{ "event_type": "alert", "dns": { "query": [ { "type": "query", "id": 0, "rrname": "www.suricata.io", "rrtype": "A", "tx_id": 0, "opcode": 0 } ] } }
{ "event_type": "alert", "dns": { "version": 3, "type": "request", "tx_id": 0, "id": 0, "flags": "100", "rd": true, "opcode": 0, "rcode": "NOERROR", "queries": [ { "rrname": "www.suricata.io", "rrtype": "A" } ] }, }
DNS 响应告警示例
7.0
8.0
{ "event_type": "alert", "dns": { "answer": { "version": 2, "type": "answer", "id": 0, "flags": "8180", "qr": true, "rd": true, "ra": true, "opcode": 0, "rrname": "www.suricata.io", "rrtype": "A", "rcode": "NOERROR" } } }
{ "event_type": "alert", "dns": { "version": 3, "type": "response", "tx_id": 1, "id": 0, "flags": "8180", "qr": true, "rd": true, "ra": true, "opcode": 0, "rcode": "NOERROR", "queries": [ { "rrname": "www.suricata.io", "rrtype": "A" ], "answers": [ { "rrname": "www.suricata.io", "rrtype": "CNAME", "ttl": 3597, "rdata": "suricata.io" }, { "rrname": "suricata.io", "rrtype": "A", "ttl": 597, "rdata": "35.212.0.44" } ] }, }