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端口扫描工具终极用法

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至察助安

修改于 2022-09-20 07:42:35

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文章被收录于专栏：漏洞分析漏洞分析

原文地址：端口扫描工具终极用法  至察助安

为什么要做c段探测，运营商分配给IDC机房地址时大部分都是连续IP地址，租给客户（渗透目标）时很大概率会分配同C段内IP地址（除非目标就一个IP地址），使用工具扫描可以探测出同段服务。

扫描工具UP主经常用的有三个：

Nmap
Masscan
zmap

Nmap用法

Nmap（Network Mapper，网络映射器) 是一款开放源代码的网络探测和安全审核的工具。老规矩先放出我最常用的命令组合方式，想了解原理继续看，不想了解直接套用就可以。

sudo nmap -v -sS -p8000-9000 -Pn -T4 -A 124.*.8.254 --script http-methods --script-args http.useragent="Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:87.0) Gecko/20100101 Firefox/87.0"

-v 实时输出扫描详情

vulab@sechelper:~/masscan$ nmap -v 124.*.8.254Starting Nmap 7.80 ( https://nmap.org ) at 2022-09-05 04:01 UTCInitiating Ping Scan at 04:01Scanning 124.*.8.254 [2 ports]Completed Ping Scan at 04:01, 0.03s elapsed (1 total hosts)Initiating Parallel DNS resolution of 1 host. at 04:01Completed Parallel DNS resolution of 1 host. at 04:01, 0.01s elapsedInitiating Connect Scan at 04:01Scanning 124.*.8.254 [1000 ports]Discovered open port 443/tcp on 124.*.8.254Discovered open port 22/tcp on 124.*.8.254Discovered open port 80/tcp on 124.*.8.254...

-A 全面扫描

vulab@sechelper:~$ nmap -A 124.*.8.254 #　nmap -A 124.*.8.1/24 扫描C段存活端口Starting Nmap 7.80 ( https://nmap.org ) at 2022-09-04 12:09 UTCNmap scan report for 124.*.8.254Host is up (0.037s latency).Not shown: 997 filtered portsPORT STATE SERVICE VERSION22/tcp open tcpwrapped|_ssh-hostkey: ERROR: Script execution failed (use -d to debug)80/tcp open tcpwrapped|_http-server-header: nginx/1.18.0 (Ubuntu)443/tcp open tcpwrapped|_http-server-header: nginx/1.18.0 (Ubuntu)| ssl-cert: Subject: commonName=navi.sechelper.com| Subject Alternative Name: DNS:navi.sechelper.com| Not valid before: 2022-08-27T00:00:00|_Not valid after: 2023-08-27T23:59:59| tls-alpn: |_ http/1.1| tls-nextprotoneg: |_ http/1.1

-Pn 禁ping扫描，扫描前不ping（不加这个参数Nmap会ping目标地址）

vulab@sechelper:~$ nmap -Pn 124..8.254Starting Nmap 7.80 ( https://nmap.org ) at 2022-09-04 13:02 UTCNmap scan report for 124..8.254Host is up (0.035s latency).Not shown: 997 filtered portsPORT STATE SERVICE22/tcp open ssh80/tcp open http443/tcp open httpsNmap done: 1 IP address (1 host up) scanned in 25.80 seconds

-p 指定端口

vulab@sechelper:~$ nmap -p22,21,8000-9000 124..8.254Starting Nmap 7.80 ( https://nmap.org ) at 2022-09-04 21:20 CSTNmap scan report for 124..8.254Host is up (0.0031s latency).PORT STATE SERVICE22/tcp open sshNmap done: 1 IP address (1 host up) scanned in 0.34 seconds

-sP 使用ping探测主机存活，不扫描端口

vulab@sechelper:~$ nmap -sP 192.168.111.1/24Starting Nmap 7.80 ( https://nmap.org ) at 2022-09-04 12:31 UTCNmap scan report for _gateway (192.168.111.2)Host is up (0.00032s latency).Nmap scan report for sechelper (192.168.111.133)Host is up (0.000091s latency).

-sS syn扫描/半开放扫描，准确率太低

vulab@sechelper:~$ sudo nmap -sS 124.*.8.254...Not shown: 979 filtered portsPORT STATE SERVICE22/tcp open ssh80/tcp open http443/tcp open https8002/tcp closed teradataordbms8042/tcp closed fs-agent8088/tcp closed radan-http8090/tcp closed opsmessaging...Nmap done: 1 IP address (1 host up) scanned in 867.60 seconds

-sT 连接扫描，准确率高

vulab@sechelper:~$ nmap -sT 124..8.254Starting Nmap 7.80 ( https://nmap.org ) at 2022-09-04 14:14 UTCNmap scan report for 124..8.254Host is up (0.037s latency).Not shown: 997 filtered portsPORT STATE SERVICE22/tcp open ssh80/tcp open http443/tcp open httpsNmap done: 1 IP address (1 host up) scanned in 14.17 seconds

状态	含义
open	端口开着，正在被使用
closed	端口已关闭
filtered	扫描被阻拦，无法确定端口是否开放
unfiltered	端口可被访问，但不能确定是开放还是关闭

表一 Nmap 端口状态表

-T 提升扫描速度，0-5，数值越高速度越快

vulab@sechelper:~/masscan$ nmap -A -v -p80 -T4 124.*.8.254...PORT STATE SERVICE VERSION80/tcp open http nginx 1.18.0 (Ubuntu)\| http-methods: \|_ Supported Methods: GET HEAD POST\|_http-server-header: nginx/1.18.0 (Ubuntu)\|_http-title: 403 ForbiddenService Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel...

绕过防火墙/安全设备

Nmap使用默认User-Agent，流量和日志里一览无遗（秃子头上的虱子），不封你封谁。大部分工具默认指纹都已被提取规则，使用的时候注意看下源码或者测试一下。

扫描时指定User-Agent，可以绕过部分安全检测

nmap -A -v -p80 124.*.8.254 --script http-methods --script-args http.useragent="Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:87.0) Gecko/20100101 Firefox/87.0"

结果写入文件

原始结果

nmap -A -v -p80 -T4 124.*.8.254 -o 4.txt

保存为XML格式

nmap -A -v -p80 -T4 124.*.8.254 -oX 4.xml

参考：

Masscan用法

Masscan是一个互联网规模的端口扫描仪。它可以在5分钟内扫描整个互联网，从一台机器每秒传输1000万个数据包。这是我常用的端口扫描工具，老规矩先放我最常用参数组合，想了解原理继续看，不想了解直接套用。

masscan -p80,8000-9000 182.92.106.58 --rate=10000 --banners --source-port 61000 --http-user-agent "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:87.0) Gecko/20100101 Firefox/87.0" -Pn

编译安装

vulab@sechelper:~$ apt install make gcc git -yvulab@sechelper:~$ git clone https://github.com/robertdavidgraham/masscan.gitvulab@sechelper:~$ cd masscanvulab@sechelper:~/masscan$ make && make install...c -g -ggdb -Wall -O2 -c src/stub-pfring.c -o tmp/stub-pfring.occ -g -ggdb -Wall -O2 -c src/syn-cookie.c -o tmp/syn-cookie.o...cc -g -ggdb -Wall -O2 -o bin/masscan tmp/crypto-base64.o tmp/crypto-blackrock2.o tmp/event-timeout.o tmp/in-binary.o tmp/in-filter.o tmp/in-report.o tmp/logger.o tmp/main-conf.o tmp/main-dedup.o tmp/main- ...

vulab@sechelper:~/masscan$ masscan -h # 出现帮助信息表示安装成功usage:masscan -p80,8000-8100 10.0.0.0/8 --rate=10000 scan some web ports on 10.x.x.x at 10kppsmasscan --nmap list those options that are compatible with nmapmasscan -p80 10.0.0.0/8 --banners -oB <filename> save results of scan in binary format to <filename>masscan --open --banners --readscan <filename> -oX <savefile> read binary scan results in <filename> and save them as xml in <savefile>vulab@sechelper:~/masscan$ masscan --helpMASSCAN is a fast port scanner. The primary input parameters are theIP addresses/ranges you want to scan, and the port numbers. An exampleis the following, which scans the 10.x.x.x network for web servers: masscan 10.0.0.0/8 -p80The program auto-detects network interface/adapter settings. If thisfails, you'll have to set these manually. The following is anexample of all the parameters that are needed: --adapter-ip 192.168.10.123 --adapter-mac 00-11-22-33-44-55 --router-mac 66-55-44-33-22-11Parameters can be set either via the command-line or config-file. Thenames are the same for both. Thus, the above adapter settings wouldappear as follows in a configuration file: adapter-ip = 192.168.10.123 adapter-mac = 00-11-22-33-44-55 router-mac = 66-55-44-33-22-11All single-dash parameters have a spelled out double-dash equivalent,so '-p80' is the same as '--ports 80' (or 'ports = 80' in config file).To use the config file, type: masscan -c <filename>To generate a config-file from the current settings, use the --echooption. This stops the program from actually running, and just echoesthe current configuration instead. This is a useful way to generateyour first config file, or see a list of parameters you didn't knowabout. I suggest you try it now: masscan -p1234 --echo

-p 指定端口

vulab@sechelper:~/masscan$ sudo masscan -p 80 124.*.8.1/24Starting masscan 1.3.2 (http://bit.ly/14GZzcT) at 2022-09-05 02:12:22 GMTInitiating SYN Stealth ScanScanning 256 hosts [1 port/host]Discovered open port 80/tcp on 124.*.8.177 Discovered open port 80/tcp on 124.*.8.39 Discovered open port 80/tcp on 124.*.8.7 Discovered open port 80/tcp on 124.*.8.186 Discovered open port 80/tcp on 124.*.8.13 Discovered open port 80/tcp on 124.*.8.77 Discovered open port 80/tcp on 124.*.8.163 Discovered open port 80/tcp on 124.*.8.133...

–rate=10000 发包频率，数值越大扫描越快，根据自己网络设置，频率太高误报越高

vulab@sechelper:~/masscan$ sudo masscan -p 80 124.*.8.1/24 --rate=10000

**–banners 指纹信息，配合 –source-port 61000 一起使用 **

Tcp协议连接目标端口时会在系统内分配一个端口与目标通讯，因为有时候从目标返回数据包会被防火墙过滤丢弃，导致masscan无法获取banner信息，所以需要设置一个固定的源端口，方便在防火墙配置白名单不丢弃/拦截此端口数据。

vulab@sechelper:~/masscan$ sudo iptables -A INPUT -p tcp --dport 61000 -j DROP

vulab@sechelper:~/masscan$ sudo masscan -p 80 124.*.8.254 --banners --source-port 61000 --rate=10000Starting masscan 1.3.2 (http://bit.ly/14GZzcT) at 2022-09-05 03:06:20 GMTInitiating SYN Stealth ScanScanning 1 hosts [1 port/host]Discovered open port 80/tcp on 124.*.8.254 Banner on port 80/tcp on 124.*.8.254: [http.server] nginx/1.18.0 (Ubuntu) Banner on port 80/tcp on 124.*.8.254: [title] 403 Forbidden Banner on port 80/tcp on 124.*.8.254: [http] HTTP/1.1 403 Forbidden\x0d\x0aServer: nginx/1.18.0 (Ubuntu)\x0d\x0aDate: Mon, 05 Sep 2022 03:06:22 GMT\x0d\x0aContent-Type: text/html\x0d\x0aContent-Length: 162\x0d\x0aConnection: close\x0d\x0a\x0d

绕过安全检测

在源码masscan/src/proto-http.c中预定义的User-Agent各大厂商肯定已经提取指纹规则，还在使用默认User-Agent不封你封谁，大部分工具默认指纹都已被提取规则，使用的时候注意看下源码或者测试一下。

服务器日志里看的清清楚楚，溯源一抓一个准。

扫描时指定User-Agent，可以绕过部分安全检测

vulab@sechelper:~/masscan$ sudo masscan -p 80 124.*.8.254 --banners --source-port 61000 --rate=10000 --http-user-agent "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:87.0) Gecko/20100101 Firefox/87.0"Starting masscan 1.3.2 (http://bit.ly/14GZzcT) at 2022-09-05 03:15:14 GMTInitiating SYN Stealth ScanScanning 1 hosts [1 port/host]Discovered open port 80/tcp on 124.*.8.254 Banner on port 80/tcp on 124.*.8.254: [http.server] nginx/1.18.0 (Ubuntu) Banner on port 80/tcp on 124.*.8.254: [title] 403 Forbidden Banner on port 80/tcp on 124.*.8.254: [http] HTTP/1.1 403 Forbidden\x0d\x0aServer: nginx/1.18.0 (Ubuntu)\x0d\x0aDate: Mon, 05 Sep 2022 03:15:16 GMT\x0d\x0aContent-Type: text/html\x0d\x0aContent-Length: 162\x0d\x0aConnection: close\x0d\x0a\x0d

-Pn 扫描前不PING，直接开扫