Cobalt Strike makes use of code and/or content from the following sources:

Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK) – (c) 2017 The MITRE Corporation. (This work is reproduced and distributed with the permission of The MITRE Corporation.)
https://attack.mitre.org/

Apache FOP – (c) 1999-2010 The Apache Software Foundation (Apache 2.0 License)
http://xmlgraphics.apache.org/fop/

Apache JAMES Mime4j – (c) 2004-2010 The Apache Software Foundation (Apache 2.0 License)
http://james.apache.org/mime4j/

Draggable Tabbed Pane – (c) Tom Martin (Creative Commons 3.0 Share-Alike [Attribution Required] License)
http://stackoverflow.com/questions/60269/how-to-implement-draggable-tab-using-java-swing

ipcalf – (c) 2012-2014 Nathan Vander Wilt (MIT License)
https://github.com/natevw/ipcalf

JGraphX – (c) JGraph Ltd 2006-2012 (BSD License)
http://www.jgraphx.com/

jQuery – (c) The jQuery Foundation 2012 (MIT License)
http://www.jquery.com/

Jsign 1.3 – (c) Emmanuel Bourg (Apache 2.0 License)
http://ebourg.github.com/jsign

LibreSSL – (c) individual authors & OpenSSL Project (BSD license, OpenSSL license, SSLeay License)
http://www.libressl.org/ & http://www.openssl.org/

libssh2 – SSH2 library – (c) Sara Golemon et al. (BSD License)
https://github.com/libssh2/libssh2

LibTomCrypt – developed by Tom St Denis (Public Domain/WTFPL)
http://libtom.org/?page=index&newsitems=5&whatfile=crypt

Metasploit Framework – (c) Rapid7 Inc. 2012 (BSD License)
http://www.metasploit.com/

Mimikatz 2.1 – (c) Benjamin ‘gentilkiwi’ Delpy (Creative Commons Attribution 4.0)
License: http://creativecommons.org/licenses/by/4.0/
http://blog.gentilkiwi.com/

Mono Icon Set – (c) Gentleface Inc. (Royalty Free License to Strategic Cyber LLC)
http://www.gentleface.com/free_icon_set.html

msfgui – (c) Matt Weeks 2010-2012 (BSD License)
http://www.metasploit.com/

NanoHTTPD – (c) 2001,2005-2012 J. Elonen and (c) 2010 K. Togias (Modified BSD License)
http://elonen.iki.fi/code/nanohttpd/

PowerShell Native API Functions – (c) 2012, Matt Graeber (BSD License)
http://www.exploit-monday.com/2012/05/accessing-native-windows-api-in.html

Reflective DLL Injection – (c) 2011, Stephen Fewer of Harmony Security (BSD License)
https://github.com/stephenfewer/ReflectiveDLLInjection

Synthetica Look and Feel – (c) Jyloo Software (Commercial License to Strategic Cyber LLC)
http://www.jyloo.com/synthetica/

tango-icon-theme-package – Tango Desktop Project (Public Domain)
http://tango.freedesktop.org/

TightVNC Java Viewer – (c) GlavSoft LLC (Commercial License to Strategic Cyber LLC)
http://www.tightvnc.com/

Unmanaged PowerShell – (c) 2015, Lee Christensen (BSD License)
https://github.com/leechristensen/UnmanagedPowerShell

user-agent-utils 1.13 – (c) Harald Walker (BSD License)
https://github.com/HaraldWalker/user-agent-utils

WinPcap – (c) 2005-2010 CACE Technologies (BSD License)
http://www.winpcap.org/

XMLmind XSL-FO Converter – (c) 2002-2012 Pixware SARL (Developer License to Strategic Cyber LLC)
http://www.xmlmind.com/foconverter/

Cobalt Strike distributes the following third-party programs for deployment as needed:

TightVNC 1.3.10 – (c) 2000-2009 TightVNC Group and others (GPLv2 License)
https://github.com/rsmudge/vncdll