Ninja – Open source C2 server created for stealth red team operations
Ninja C2 is an Open source C2 server created by Purple Team to do stealthy computer and Active directory enumeration without being detected by SIEM and AVs, Ninja still in beta version and when the stable version released it will contain many more stealthy techniques and anti-forensic to create a real challenge for the blue team to make sure all the defenses configured correctly and they can detect sophisticated attacks.
Ninja uses python to server the payload and controls the agents. the agents are based on C# and PowerShell which can bypass leading AVs. Ninja communicates with the agents in secure channel encrypted with AES-256 and the key is not hardcoded but randomly generated on the campaign start, every agent connect to the C2 get the key and if the C2 restarted a new key will be used by all old agents and the new. Ninja also randomizes the callback URLs for every campaign to bypass static detection.
- The main feature in Ninja is called DA ( Defense Analysis ), which will do the required enumeration to get below important information and do analysis on them to get a score for system defenses and sandbox detection.
- Detect SIEM solutions: right now it detects SPlUNK , Log beat collector, sysmon.
- detect AV using two ways, using PowerShell command and using processes.
- check if the PowerShell logging enabled
- check if the user has admin privileges
- provide information about the system : host name , OS , build number , local time , time zone , last boot and bios .
- provide information about the installed security updates.
- provide a System pwn hardness score based on multiple factors.
- provide a sandbox detection score based on ( privileges , bios manufacturer , joined to domain or not , existence of sysinternals processes ).
- show all domain users ( using PowerShell commands ).
- show all domain groups ( using PowerShell commands ).
- show all domain computers ( using powerview.ps1 – taken from: https://github.com/PowerShellEmpire/PowerTools/blob/master/PowerView/powerview.ps1 ).
- show available shares.
Ninja is designed to be easy to setup and to add more commands and do automation for boring tasks. you can find many short commands that a red teamer struggle to memorize and search for them. please check this article to know more about ninja: https://shells.systems/introducing-ninja-c2-the-c2-built-for-stealth-red-team-operations/
Ninja key features
Ninja is packed with a number of features that allows you to gain an insight into your upcoming engagement before you actually need to deploy your full arsenal of tools and techniques, such as:
- Defense Analysis
- automation for kerberoast attack from generating the kerberos tickets to extracting the SPN hashes into hashcat format.
- automation for dc_sync to get hashes for a list of users or domain admin group.
- Undetected Automation to get groups the user belongs to and the user’s member in a group.
- Automation for bloodhound AD data collection.
- customized c# payloads that encrypt strings to bypass static detection.
- encode any command you want to unicode base64 to be used in PowerShell encoded commands.
- full encryption of all communications between Agent and command and control to bypass AV and IPS detection.
- dynamic URLs for all functions, just place your list of URL names and the c2 will use it randomly to bypass any static detection.
- get random encryption key on the fly ( not hardcoded ) every time the agent connect ( even reconnection needs a new key )
- take screenshots and send it encrypted to C2
- upload files from C2 to victim encrypted to bypass AV and IPS
- download files from the victim encrypted to bypass AV and IPS
- staged payloads to bypass detection ( base64 and base52 )
- bypasses AVs ( tested on kaspersky and trendmicro )
- Bypasses SIEM detection ( tested on splunk collecting usual event logs along with sysmon logs ) not tested on PowerShell v5 script block and module logging ( will be done in the next release ).
- set the beacon interval dynamically even after the agent connected and provide a starting beacon interval in the campaign start configurations
- logging for all commands and results in order to return to any data you missed in your operation.
- set the configuration one time when you start the campaign and enjoy it.
- global kill switches to end campaigns.
- delete table entries.
- all the payload is written to payloads folder for easy access and further customization.
- easy to add automation for any command you want.
Please note that compling C# depends on the
System.Management.Automation.dll assembly with SHA1 hash c669667bb4d7870bc8bb65365d30071eb7fb86fe.
Some Ninja Commands require below modules ( already exist in modules ) which you need to get updates from their repo :
Invoke-Kerberoast : https://raw.githubusercontent.com/xan7r/kerberoast/master/autokerberoast.ps1
First of all, make sure to download the latest version of Ninja using the following command :
git clone https://github.com/ahmedkhlief/Ninja/
You need to setup Ninja by running install.sh script :
chmod +x ./install.sh
After that you need to initialize the campaign :
Now you can start the Ninja server :
You will be greeted with the following once you run it :
88 88 "" "" 88888 8888 8b,dPPYba, 88 8b,dPPYba, 88 ,adPPYYba, 88 88 88 88P' `"8a 88 88P' `"8a 88 "" `Y8 88 88 88 88 88 88 88 88 ,adPPPPP88 88 88 88 88 88 88 88 88 88, ,88 88 88 88 88 88 88 88 88 `"8bbdP"Y8 88 88 ,88 88888 888888 888P" V1.0.1 BETA ! Ninja C2 | Stealthy Pwn like a Ninja +------------------------------------------------------------+ Command Description ------- ----------- exit Exit the console , or kill the agent list List all agents help Help menu show Show Command and Controler variables use Interact with AGENT back Back to the main payload Show Payloads load load modules kill_all kill all agents delete delete agent from the list delete_all delete all agents in the list set-beacon set the beacon interval live for agent download download file from the vicitm downloads list downloaded files upload upload files to the victim modules list all the Available modules in Modules directory encode64 encode any command to base64 encoded UTF-8 command ( can be decoded in powershell) screenshot take screenshot form the victim DA Run defense Analysis Module kerb do kerberoast attack and dump service accounts hashes dcsync_admins do dcsync attack agains domain admins group dcsync_list do dcsync attack agains custom user list get_groups get all the groups user is member of get_users get all the users member in group bloodhound run bloodhound to collect all the information about the AD +------------------------------------------------------------+
Please check this article about Ninja and how to use it : https://shells.systems/introducing-ninja-c2-the-c2-built-for-stealth-red-team-operations/.
- Enhance DA module and add more SIEM , AV and sandbox detection along with more important enumeration data.
- more focus on stealth to load agent parts only when needed
- add more shortened commands for popular modules
- add more customizations and ideas for phishing using C# payloads and macros
- integration with curveball exploit
- integration with new exchange RCE
- Undetectable Persistence
- create a wipe command to securely remove files on hard disk without being detected and analyzed by the blue team.
- make the agent blocks changes randomly to bypass any static detection
- add obfuscation for the agents.
- integrate cobalt strike payloads