SharpStrike : A Post Exploitation Tool Written In C# Uses Either CIM Or WMI To Query Remote Systems

SharpStrike is a post-exploitation tool written in C# that uses either CIM or WMI to query remote systems. It can use provided credentials or the current user’s session.

Note: Some commands will use PowerShell in combination with WMI, denoted with ** in the --show-commands command.

Introduction

SharpStrike is a C# rewrite and expansion on @Matt_Grandy_’s CIMplant and @christruncer’s WMImplant.

SharpStrike allows you to gather data about a remote system, execute commands, exfil data, and more. The tool allows connections using Windows Management Instrumentation, WMI, or Common Interface Model, CIM ; well more accurately Windows Management Infrastructure, MI. CIMplant requires local administrator permissions on the target system.

Setup

It’s probably easiest to use the built version under Releases, just note that it is compiled in Debug mode. If you want to build the solution yourself, follow the steps below.

1. Load SharpStrike.sln into Visual Studio
2. Go to Build at the top and then Build Solution if no modifications are wanted

The Build will produce two versions of SharpStrike: GUI (WinForms) & Console application. Each version implements the same features.

Usage

Console Version:
SharpStrike.exe –help
SharpStrike.exe –show-commands
SharpStrike.exe –show-examples
SharpStrike.exe -c ls_domain_admins
SharpStrike.exe -c ls_domain_users_list
SharpStrike.exe -c cat -f “c:\users\user\desktop\file.txt” -s [remote IP address]
SharpStrike.exe -c cat -f “c:\users\user\desktop\file.txt” -s [remote IP address] -u [username] -d [domain] -p [password] -c
SharpStrike.exe -c command_exec -e “quser” -s [remote IP address] -u [username] -d [domain] -p [password]
GUI version:
show-commands
show-examples
ls_domain_admins
ls_domain_users_list
cat -f “c:\users\user\desktop\file.txt” -s [remote IP address]
cat -f “c:\users\user\desktop\file.txt” -s [remote IP address] -u [username] -d [domain] -p [password]
command_exec -e “quser” [remote IP address] -u [username] -d [domain] -p [password]

Functions

File Operations

cat – Reads the contents of a file
copy – Copies a file from one location to another
download** – Download a file from the targeted machine
ls – File/Directory listing of a specific directory
search – Search for a file on a user
upload** – Upload a file to the targeted machine

Lateral Movement Facilitation

command_exec** – Run a command line command and receive the output. Run with nops flag to disable PowerShell
disable_wdigest – Sets the registry value for UseLogonCredential to zero
enable_wdigest – Adds registry value UseLogonCredential
disable_winrm** – Disables WinRM on the targeted system
enable_winrm** – Enables WinRM on the targeted system
reg_mod – Modify the registry on the targeted machine
reg_create – Create the registry value on the targeted machine
reg_delete – Delete the registry on the targeted machine
remote_posh** – Run a PowerShell script on a remote machine and receive the output
sched_job – Not implimented due to the Win32_ScheduledJobs accessing an outdated API
service_mod – Create, delete, or modify system services
ls_domain_users* – List domain users ls_domain_users_list* – List domain users sAMAccountName
ls_domain_users_email* – List domain users email address ls_domain_groups* – List domain user groups
ls_domain_admins* – List domain admin users ls_user_groups* – List domain user with their associated groups
ls_computers*** – List computers on current domain

Process Operations

process_kill – Kill a process via name or process id on the targeted machine
process_start – Start a process on the targeted machine
ps – Process listing

System Operations

active_users – List domain users with active processes on the targeted system
basic_info – Used to enumerate basic metadata about the targeted system
drive_list – List local and network drives
share_list – List network shares
ifconfig – Receive IP info from NICs with active network connections
installed_programs – Receive a list of the installed programs on the targeted machine
logoff – Log users off the targeted machine
reboot (or restart) – Reboot the targeted machine
power_off (or shutdown) – Power off the targeted machine
vacant_system – Determine if a user is away from the system
edr_query – Query the local or remote system for EDR vendors

Log Operations

logon_events – Identify users that have logged onto a system
All PowerShell can be disabled by using the –nops flag, although some commands will not execute (upload/download, enable/disable WinRM)
** Denotes PowerShell usage (either using a PowerShell Runspace or through Win32_Process::Create method)
*** Denotes LDAP usage – “root\directory\ldap” namespace

Solution Architecture

SharpStrike is composed of three main projects

• ServiceLayer — Provides core functionality and consumed by the UI layer
• Models — Contains types, shared across all projects
• User Interface — GUI/Console

ServiceLayer

• Connector.cs

This is where the initial CIM/WMI connections are made and passed to the rest of the application

• ExecuteWMI.cs

All function code for the WMI commands

• ExecuteCIM.cs

All function code for the CIM (MI) commands