mitmproxy is an interactive console application for intercepting, inspecting, modifying, and replaying web traffic, especially useful in mobile application development. It can be configured as a proxy and requires the installation of a custom SSL certificate for HTTPS traffic decryption. Alternatives to mitmproxy include paid tools like Charles and Fiddler, with additional resources and contact information provided for further assistance.

1. mitmproxy.org
An interactive console program that allows traffic flows to be
intercepted, inspected, modified and replayed.
-Vishal Vyas

2. Me?
Into mobile application development for 6 years
Developed mobile advertising SDKs (Android and iOS)

3. Me?
Working with a Startup from past 6 months
Developed mobile advertising SDKs (Android and iOS)
and
I am NOT a HACKER :?

4. A basic mobile application
Web Server
Web
Services Database
Mobile Device
Local Database
(cached data)
Application PLAIN TEXT,
JSON, XML
...

5. Man in the Middle Attack?

6. What is mitmproxy?
Web Server
Web
Services
Databas
e
Mobile Device
Local
Databa
se
Application
My Laptop running
MITMproxy

7. An SSL-capable man-in-the-middle proxy
Generic pentest/debug tool
Interactive, console based
intercept & modify
Extensible – invoke Python modules
What is mitmproxy?

8. How to … ?
MITMproxy is not an attack tool!
Configure it as a proxy
Import the CA Root cert
Run as interactive console app
Or 'mitmdump' - Think tcpdump for HTTP

9. To get started
Install
pip install mitmproxy
See the installation instructions for more

10. Start MITM proxy
vishal@vishal:~$ sudo mitmproxy -b 192.168.1.108 -p 8080 --no-upstream-cert
-b ADDR, --bind-address ADDR Address to bind proxy to
-p PORT, --port PORT Proxy service port
--no-upstream-cert Don't connect to upstream server to look up certificate details

11. Configure Proxy

12. Configure Proxy
Proxy Settings
To automate this step
BUT!
No support for Android Marshmallow

13. Download and
Add Certificate
Custom SSL certificate that
allows mitmproxy to decrypt
the HTTPS traffic.

14. Start
monitoring
your traffic

15. 3G/4G connections?
:(

16. 3G/4G connections?
:(
BUT! You still can use your nifty hotspot feature! What you need is:
a device with a 3G/4G connection
the development device
your laptop

17. How we used mitmproxy for QA testing?
For mobile operator targeting
Spoofing operator name(s) in the HTTP request to check if server response

18. Any Alternatives?
Charles (Paid)
Fiddler

19. www.hashbinary.com
HashBinary
Software Development Services Company
Mobile Application Development
Consulting

20. Thank You!
Slides
https://goo.gl/TJHQ4I
References
https://medium.com/@rotxed/how-to-debug-http-s-traffic-on-android-7fbe5d2a34#.ozotqeton
https://www.owasp.org/images/7/73/SlayingDragons-ccbysa30nz.pdf
https://github.com/mitmproxy/mitmproxy/tree/master/examples
Have any questions?
Email : vishalvyas.k@gmail.com
Twitter : @veshalvyas