DESCRIPTION

ARTC2 is a modern execution framework that helps security teams scale attack scenario execution from single and multi-breach point targets. It intends to produce actionable attack intel that improves the effectiveness of security products and incident response.

OS-SUPPORT

• Windows OS

CAPABILITIES

ARTC2 Core features and capabilities are sourced from SILENTTRINITY, and atomic tests executed through Boo are from ATOMIC-RED-TEAM. All other feature enhancements were built to ensure operational trade-craft, agility, scalability, and rapid execution are not compromised.

CAPABILITY	DESCRIPTION
Rapid Deployment	Automate and scale testing efforts from single and multi-target breach points located in different regional environments
Modern Command & Control	Implant and Server Comms: Uses SILENTRINITY's ECDHE Encrypted C2 Communication capabilities to encrypt C2 traffic over HTTPS. Client and Server Comms: Uses Asyncio, WebSockets, and a prompt-toolkit CLI. Notable features include: - Implant location tagging: Helpful when managing signals and breakpoints in different regions. NGROK integration - Great for staging payloads and deploying them with ngrok URLs
Standard Signature Header	JSON PID: , Date(UTC), IsHighIntegrity, HostName, CurrentUser , IsUserAdmin, IPv4, IPv6
JSON Logging Support	Streamline, ingest, decode, and analyze evidence with your ELK stack or any Analytics platform ready to parse JSON.
Stageless in Memory Code Execution	Execute Atomic Red Team tests from an unmanaged PowerShell process with low, medium, and high integrity.
Dynamic Attack Formations	Execute attack chains without recompiling or restart ARTC2. Currently supports three different attack functions. Attack Chains, Attack Profiles, and Attack Scenarios
Modular Payload Delivery	ARTC2 leverages SILENTRINITY's framework uses unmanaged powershell and stageless powershell stagers to compile and execute Red Team Atomic test payloads in memory, "AS IS"
Operational Management	Job IDs are included for controller execution and evidence collection. They're great for event analysis and evidence correlation. "job_id": "D3l820IWpyi67"

USE CASES

• SOCs need to evaluate and improve EDR solutions in minutes
• Organizations are evaluating different EDR/AV solutions for Windows OS

Organizations need to:

• execute APT group tactics in controlled environments
• demonstrate the ability to block common attacks from disk and memory
• execute lightweight atomics remotely
• benchmark critical risk profiles against MITRE ATT&CK before releasing systems to Corp IT/production
• execute ransomware tactics mapped to ATT&CK safely
• keep tight margins between (MTTD) and (MTTR) metrics
• continually improve SOAR workbooks
• evaluate host security controls between different business units and regions.

LOGGING CAPABILITIES

By default, ARTIC-C2 logs are written to ARTIC-C2's current working directory in ./logs/. Session logs include:

• utc_timestamp: UTC timestamp
• session: Target session GUID
• job_id: Unique Job execution ID
• ttp_data: Technique ID
• evidence: Base64 encoded evidence collected from a breach point target
• evidence_status: Status to indicate if the TTP executed was blocked.
  • 1: TTP was not blocked
  • 0: TTP was partially blocked or failed to execute

EXECUTION SIGNATURE HEADER

Execution signature headers are used to verify if any defenses block atomics. Sometimes, the atomic commands may not return data in STDOUT. However, if the execution signature header returns header information, then this indicates the source code compiled, loaded into the CLR, and executed on the target breach point. The execution signature header includes:

• PID: used during technique execution
• Date: UTC stamp produced from the breach point target
• IsHighIntegrity: Process integrity status
• HostName: breach point target hostname
• CurrentUser: Current user. Great for tracking when users are impersonated
• IsUserAdmin: Admin status
• IPv4: IPv4 address info
• IPv6: IPv6 address info

SAMPLE EXECUTION EVENT LOG

T1069.001-2 was executed in memory

2021-08-21 07:42:21,146 - {"utc_timestamp": "2021-08-21T07:42:21Z", "msg": "Technique executed:", "controller": "Discovery/T1069.001-2", "last_updated_by": "ARMADO, Inc.",
"ttp_id": "T1069.001", "ttp_opts": {"OutString": {"Description": "Appends Out-String to the PowerShellCode", "Required": false, "Value": true}, "BypassLogging": 
{"Description": "Bypasses ScriptBlock and Techniques logging", "Required": false, "Value": true}, "BypassAmsi": {"Description": "Bypasses AMSI", "Required": false, "Value": true}},
 "decompressed_file": "n/a", "file_name": "n/a", "gzip_file": "n/a", "language": "boo", "references": ["System.Management.Automation"], "run_in_thread": "n/a", "job_id": "B5ppBWed5NF6c"}

SAMPLE EVIDENCE COLLECTION LOG

Evidence was collected from the target breach point after executing T1069.001-2.

2021-08-21 07:42:25,076 - {"utc_timestamp": "2021-08-21T07:42:25Z", "session": "17ed378a-8cb9-4690-9087-e894c2b1e0a2", "job_id": "B5ppBWed5NF6c", "ttp_data": "T1069.001", "evidence": "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",
"evidence_status": "1"}

SAMPLE HEADER SIGNATURE

"{PID: 5556, Date(UTC): 2020-01-02T06:55:47Z, IsHighIntegrity: true, HostName: ad-dc1, CurrentUser: artic\\c2operator, IsUserAdmin: true,
IPv4: [10.1.0.100, 169.254.134.111], IPv6: [fe80::dde1:22a:7ba3:fe0b%5, fe80::b8f8:b421:27c8:866f%11]}

SAMPLE BASE64 DECODED EVIDENCE LOG

"{PID: 5556, Date(UTC): 2021-08-21T07:42:24.9073249Z, IsHighIntegrity: true, HostName: ad-dc1, CurrentUser: deeproot\\russel_hancock, IsUserAdmin: true,
IPv4: [10.1.0.100, 169.254.134.111], IPv6: [fe80::dde1:22a:7ba3:fe0b%5, fe80::b8f8:b421:27c8:866f%11]}
Name                                    Description
----                                    -----------
Cert Publishers                         Members of this group are permitted to publish certificates to the directory
RAS and IAS Servers                     Servers in this group can access remote access properties of users
Allowed RODC Password Replication Group Members in this group can have their passwords replicated to all read-only do...
Denied RODC Password Replication Group  Members in this group cannot have their passwords replicated to any read-only...
"

GENERAL REQUIREMENTS

Listeners

By default, listeners bind to the system's interface with HTTPS:443 and HTTP:80. They must be accessible from the assumed breach point target. Set your Callback URLs in the :> listeners context before generating any stager.

BASIC INSTALL

1. git clone https://github.com/ARMADOinc/Atomic-Red-Team-intel-C2.git
2. cd ./Atomic-Red-Team-intel-C2
3. ./install.sh install

DEPLOYMENT OPTIONS

ARTIC-C2 enables flexible deployment models to suit all atomic test case execution requirements. While there are a few client-side console dependencies relative to caching, the client console is not required to run on the same system as the team server. Soon, we'll package and release a dedicated client.

NOTE: The examples below assume ARTIC-C2 will start from the same instance.

Start WSS on the default port and produce an ad-hoc log

• server: artic2.py wss 127.0.0.1 Art1.c25rvr >> /var/log/artic2.log &
• client: artic2.py client wss://operator:[email protected]:5000

Start WSS on the default port in the foreground

• server: artic2.py wss 127.0.0.1 Art1.c25rvr
• client: artic2.py client wss://operator:[email protected]:5000

Start WSS on port 5443, bind to 10.0.0.43, produce adhoc log and connect two clients

• server: artic2.py wss 10.0.0.43:5443 Art1.c25rvr >> /var/log/artic2.log &
• client1: artic2.py client wss://operator1:[email protected]:5443
• client2: artic2.py client wss://operator2:[email protected]:5443

DOCUMENTATION:

• In progress.

CREDITS & ACKNOWLEDGEMENTS

• Marcello Salvati @byt3bl33d3r and all SILENTRINITY c2 project contributors
• Red Canary and all ATOMIC RED TEAM project contributors
• Atomic Red Team Community