前言

本篇文章将介绍利用Wazuh和Nmap集成，扫描内网中开放端口和服务。

此处我们将使用python-nmap**(https://pypi.org/project/python-nmap/)**来扫描不同子网的开放端口/服务。

Nmap扫描器需要安装在不同网段的不同Wazuh agent上，其输出被转换为JSON，并添加到每个agent的
active-responseses.log中。然后扫描通过cron安排作业，每周、每月等执行一次，这里也可以通过Wazuh
的wodle command集成来触发。

环境准备

Nmap需要安装在不同网段不个代理上，以运行网络扫描。（如果每个代理上安装也不是不行，看你喜欢。）

安装python-nmap(https://pypi.org/project/python-nmap/)

实现过程

agent端

nmap.py

注：这个脚本可以放在agent上的任何文件夹中，它的执行可以用cron来安排。

import nmap
import time
import json
nm = nmap.PortScanner()
#Add subnets to scan to the Subnets Array
subnets=['192.168.252.0/24','192.168.1.0/24']
for subnet in subnets:
json_output={}
nm.scan(subnet)
for host in nm.all_hosts():
json_output['nmap_host']=host
for proto in nm[host].all_protocols():
if proto not in ["tcp", "udp"]:
continue
json_output['nmap_protocol']=proto
lport = list(nm[host][proto].keys())
lport.sort()
for port in lport:
hostname = ""
json_output['nmap_port']=port
for h in nm[host]["hostnames"]:
hostname = h["name"]
json_output['nmap_hostname']=hostname
hostname_type = h["type"]
json_output['nmap_hostname_type']=hostname_type
json_output['nmap_port_name']=nm[host][proto][port]["name"]
json_output['nmap_port_state']=nm[host][proto][port]["state"]
json_output['nmap_port_product']=nm[host][proto][port]["product"]
json_output['nmap_port_extrainfo']=nm[host][proto][port]["extrainfo"]
json_output['nmap_port_reason']=nm[host][proto][port]["reason"]
json_output['nmap_port_version']=nm[host][proto][port]["version"]
json_output['nmap_port_conf']=nm[host][proto][port]["conf"]
json_output['nmap_port_cpe']=nm[host][proto][port]["cpe"]
with open("/var/ossec/logs/active-responses.log", "a") as active_response_log:
active_response_log.write(json.dumps(json_output))
active_response_log.write("\n")
time.sleep(2)

manager端

检测规则

<group name="linux,nmap,network_scan">
<rule id="200400" level="3">
<decoded_as>json</decoded_as>
<field name="nmap_host">\.+</field>
<field name="nmap_protocol">\.+</field>
<description>NMAP: Network Scan Host $(nmap_host)</description>
<options>no_full_log</options>
</rule>
</group>

扫描结果

{
"timestamp":"2022-06-29T18:20:32.001+0000",
"rule":{
"level":3,
"description":"NMAP: Network Scan Host 192.168.252.222",
"id":"200400",
"firedtimes":55,
"mail":false,
"groups":[
"linux",
"nmap",
"netwprk_scan"
]
},
"agent":{
"id":"017",
"name":"ubunutu2004vm",
"ip":"192.168.252.191"
},
"manager":{
"name":"ASHWZH01"
},
"id":"1645591052.115711751",
"decoder":{
"name":"json"
},
"data":{
"nmap_host":"192.168.252.222",
"nmap_protocol":"tcp",
"nmap_port":"443",
"nmap_hostname":"_gateway",
"nmap_hostname_type":"PTR",
"nmap_port_name":"https",
"nmap_port_state":"open",
"nmap_port_product":"OPNsense",
"nmap_port_reason":"syn-ack",
"nmap_port_conf":"10"
},
"location":"/var/ossec/logs/active-responses.log"
}