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Mon, 9 Mar 2015

Break the Web at BlackHat Singapore

Web application security training in 2015?

It's a valid question we get asked sometimes. With the amount of books available on the subject, the tools that seemingly automate the process coupled with the fact that findings bugs in web apps should be harder now that frameworks and developers are more likely to produce secure code, is there a need to still train people up in the art of application exploitation?


Our response is yes. Our application assessment course constantly changes. We look at the thousands of assessments that we perform for our customers and take those vulnerabilities discovered, new architectures and designs and try and build practical exploitation scenarios for our students. We love breaking the web, the cloud, 'the box that's hosted somewhere you can't recall but just works', as there's always new approaches and methods one can take to own the application layer.


Last month I discovered a vulnerability in Redhat's OpenStack Platform. What was cool about this vulnerability is that it's not a new class of vulnerability but when deployed in an organisation, it allows an authenticated user the ability to read files on the filesystem with the permissions of the web server. Owning organisations is all about exploiting flaws and chaining them together to achieve the end goal.


We want to teach you the same process: from learning how to own the application layer whilst having fun doing it at BlackHat Asia - Singapore.


During the course we will have a view on:


  • Introduction to the hacker mindset (more important than it sounds!)

  • Reconnaissance techniques.


...and...breaking the web...

  • Understanding and exploiting data validation issues such as SQLi, XSS, XML and LDAP injections.

  • Session Management issues...oh cookies!

  • Attacking web services.

  • Glance of client-side technologies such as Silverlight, ActiveX.


This course will be hands on. It won't just be me standing up and speaking but you learning how to own web apps and exploit common vulnerabilities just like the best.


Come and join us! It will be fun :)


/S


 


 

Wed, 4 Mar 2015

SensePost Training

sensepost_blackhat
Over those years, we've trained thousands of students in the art of offensive and defensive security through our Hacking by Numbers courses.


Our courses are taken directly from the work we do. When we compromise networks, or applications with new techniques, they're turned into modules in the appropriate course. We also don't use trainers; every course is given by one of our analysts to keep it authentic.


For our fifteenth year, we've decided it was time to retire the ‘Hacking by Numbers' name and just call it was it really always has been: SensePost Training.


We've also simplified the path to offensive security mastery with our artisanal, fair trade, hand crafted training courses:


sensepost_training_flow


Beginner


The beginner course lies at the start of the journey. This course doesn't assume anything of the student other than desire to learn. The course will present the background information, technical skill and basic concepts to get a student going in the field of information security (we can't bring ourselves to say “cyber”).


Students will start at learning how to use the command line interface for Linux to get the best out of an offensive Linux tool-set, then delve into networking fundamentals and vulnerability discovery and finally, learn how to exploit common weaknesses within the network, application, mobile and wireless arenas.


The course will serve those wanting to understand the offensive security world as well as those looking to join it. It's a fun course with plenty of hands on exploitation and owning stuff. For more information, visit Blackhat's USA training page here.


Journeyman


‘A journeyman is an individual who has completed an apprenticeship and is fully educated in a trade or craft, but not yet a master' Wikipedia.


The Journeyman layer is where you learn the trade in order to become a master. This layer is where our decade and a half of experience in gaining access to everything from ships to data centers is most evident. Each of the journeyman courses are hands on, fully interactive and teach the latest approaches and techniques for exploiting everything! We've completely revamped the courses and our analysts typically add new techniques as they happen, sometimes even during the course.


The journeyman series contain several courses focused on specific areas of specialisation, from hacking networks and applications, to securing code, to signals (wireless) and advanced second order compromises (spec ops).


If you are looking to expand your skill-set then these courses are for you.


Master


At the top of the learning tree is our brand new Master course. This course is aimed at those students who've completed one or more of the Journeyman courses, or are working senior penetration testers. Nmap's man page, Metasploits internals, or network pivoting should not be new concepts.


This course sets about teaching students how to hack like an APT; with strong offensive focus drawing on the techniques employed in recent industry hacks. Students will be thrown into environments they've never seen before, and forced to rely on wits, or shown how to turn the mundane into the extraordinary.


To learn more about this course being offered at Blackhat USA, head over to here.


Conclusion


When you love what you do, you love showing others how to do it; training is at the heart of what we do at SensePost. Using our decade of BlackHat training experience, we've put a lot of thought into creating some awesome courses for our fellow hackers. We hope to seeing you in one at BlackHat USA Las Vegas 2015.

Mon, 23 Feb 2015

Improvements in Rogue AP attacks - MANA 1/2

At Defcon 22 we presented several improvements in wifi rogue access point attacks. We entitled the talk "Manna from heaven" and released the MANA toolkit. I'll be doing two blog entries. The first will describe the improvements made at a wifi layer, and the second will cover the network credential interception stuff. If you just want the goodies, you can get them at the end of this entry for the price of scrolling down.


Introduction


This work is about rogue access points, by which we mean a wireless access point that mimics real ones in an attempt to get users to connect to it. The initial work on this was done in 2004 by Dino dai Zovi and Shaun Macaulay. They realised that the way wifi devices probe for wireless networks that they've "remembered" happens without authentication, and that if a malicious access point merely responds to these directed probes, it can trick wireless clients into connecting to it. They called this a KARMA attack.


Additionally, Josh Wright and Brad Antoniewicz in 2008 worked out that if you man in the middle the EAP authentication on secured networks, you could crack that hash and gain access to the network yourself. They implemented this in freeradius-wpe (wireless pwnage edition).


However, KARMA attacks no longer work well, and we wanted to know why. Also, the WPE stuff seemed ripe for use in rogue access points rather than just for gaining access to the original network. This is what we implemented.


Changes in Probing


After a significant amount of time poring over radio captures of the ways in which various devices probed, and informed by our previous work on Snoopy, we realised two things. The first is that modern devices, particularly mobile ones, won't listen to directed probe responses for open, non-hidden networks if that AP didn't also/first respond to a broadcast probe. What this means is that our rogue access point needs to implement the same. However, the challenge is, what do we respond to the broadcast probe *with*?


To overcome that, we took the existing KARMA functionality built by Digininja, ported it to the latest version of hostapd and extended it to store a view of the "remembered networks" (aka the Preferred Network List (PNL)) for each device it sees. Then when hostapd-mana sees a broadcast probe from that device, it will respond with a directed probe response for each network hostapd-mana knows to be in that device's PNL. This is based on our finding, that wifi clients don't have a problem with a single BSSID (i.e. AP MAC address) to have several ESSIDs (aka SSID aka network name).


Practically, suppose there are two devices, one probing for a network foo, and the other probing for two networks bar and baz. When device1 sends a broadcast probe, hostapd-mana will respond with a directed probe response for foo to device1. Likewise when device2 sends a broadcast probe, hostapd-mana will respond with two directed probe responses to device 2, one for bar and one for baz. In addition, the "normal" KARMA functionality of responding to directed probes will also occur. Practically, we found this significantly improved the effectiveness of our rogue AP.


iOS and hidden networks


iOS presented an interesting challenge to us when it came to hidden networks. A hidden network is one configured not to broadcast its ESSID in either its beacons or broadcast probe response. Practically, the only way a client device can know if the hidden network it has remembered is nearby is by constantly sending out directed probes for the network. This is why hidden networks aren't a very good design, as their clients need to spew their names out all over the place. However, when observing iOS devices, while they could join a hidden network just fine, they seemed to not probe for it most of the time. This had us constructing faraday cages, checking other factors like BSSID and geolocation to no avail. Until we realised that iOS will not probe for any hidden networks in its PNL, unless there is at least one hidden network nearby. So, if you'd like to maximise your rogue'ing, make sure you have a hidden network nearby. It doesn't even need to be a real network; use a mifi, use airbase-ng or just create another hostapd network.


Limits in probing


Modern mobile devices probe for networks on their PNL *significantly* less than laptops or older devices do. In an ideal world, manufacturers would change the implementation to never probe for open network, and only wait for a response to a broadcast, effectively limiting these attacks to requiring pre-knowledge, common networks or being performed in the vicinity of the actual network. Actually, a patch was pushed to wpa_supplicant to limit the stupid probing behaviour Android does in low power mode a few months ago, this will make it into Android proper sometime soon. Also, iOS has significantly reduced how often it probes.


There are two ways to work around this. The first is manual; go for a common network. The rise of city-wide wifi projects makes this somewhat easy. Or if you're going for a corporate network, just do some recon and name one of your access points after that. But, we wanted to make things work better than that. The default behaviour of hostapd-mana is to build up a view of each devices PNL and only respond to broadcasts with networks specific to that device. However, we can remove that limitation and build a global PNL, and respond to each broadcast with every network every device has probed for. We call this loud mode, and it's configurable in the hostapd-mana config. This relies on the fact that many devices, particularly laptops and older mobile devices still probe for networks a lot. It also relies on the fact that many devices have networks in common (have they been in the same city, same airport, same conference, same company, same pocket etc.). This works *very* well in less crowded areas, and you'll get a much higher number of devices connecting.


However, in busy areas, or if your antenna is large enough, you'll quickly exceed the capacity for your average wifi device to respond fast enough to all of the devices, and as the number of response probes grows exponentially with each new device, even in quiet areas over time, this problem crops up (but didn't on stage at Defcon miraculously). So, it's *good enough* for now, but needs an in-kernel or in-firmware implementation with some network ageing to scale a bit better (one of the many opportunities for extending this work if you're up for some open source contribution).


Auto Crack 'n Add


freeradius-wpe is great, it provides a nice way to grab EAP hashes for clients that don't validate certificates presented via EAP's that implement SSL (PEAP, EAP-GTC, PEAL-TTLS). However, the patches are for freeradius v1 and, much like the KARMA patches for hostapd, have aged. But, hostapd contains a radius server, and so we could port the freeradius-wpe work to that, something we based off some initial but incomplete patches by Brad Antoniewicz. So hostapd-mana will also let you grab EAP hashes without needing another tool.


However, the KARMA attacks only work against open wifi networks. EAP networks are increasingly common (especially corporate ones) and we wanted to be able to have a go at getting devices probing for those to connect to our rogue AP. To do this, we modified hostapd-mana to always accept any EAP hash, but send it off for cracking. It simply writes these to a file, from which the simple python tool crackapd (included) will grab it and send it off to another process for cracking. Currently, we use asleap (also by Josh) and the rockyou password list, but these can all be easily modified. For example, to use CloudCracker and its incredibly optimised MS-CHAPv2 cracking setup.


The net result is pretty great for simple EAP hashes. The device will try and connect, and fail as we don't know enough to do the challenge response right. But after the hash is cracked, when it retries to connect (something a device will keep doing) it will succeed (and you'll have your first creds). For simple hashes, this is transparent to the user. Of course, very complex hashes will only work if you crack them in time. Worst case scenario, you leave with hashes.


Conclusion


So that's what we built into hostapd-mana. You get improved KARMA attacks, a modern hostapd version, an integrated hash stealer, and the possibility of rogue'ing some EAP networks. You can get the full toolkit at MANA toolkit on GitHub or our hostapd-mana at hostapd-mana on GitHub.


The next blog entry will cover what we did once we got a device to connect.


The Goodies


The Defcon talk:


The supporting slide deck with more information:


The final toolkit: MANA toolkit on GitHub You can also get this on Kali with "apt-get install mana-toolkit"


The modified hostapd (for hackers or people who want to build their own setup): hostapd-mana on GitHub

Mon, 3 Nov 2014

Are you the intern we've been looking for?

intern


 


We're looking for an intern to join our newly formed 'Innovation Centre' arm of SensePost/SecureData. Have a read below for some more information, and drop us a mail if you're interested or would like some more info (glenn@sensepost.com).




The purpose of the Innovation Centre is to offer an incubation hub through which new ideas, concepts and other technical and business innovations can be collected & captured and then rapidly described, prioritised researched, prototyped, tested, advocated and transitioned into the business.


About the Intern Position:


The ideal candidate should have a computer science or similar background, but equivalent work experience or self taught candidates will also be considered. The following specific requirements are required:


* Familiarity with at least one scripting language, preferably Python
* Fundamental understanding of networking
* Linux experience
* A positive attitude with a capable problem solving capabilities


The following points would be seen as a bonus:
* Strong computer science degree
* Industry experience (e.g. holiday internship).
* Web development capabilities
* Security knowledge / experience
* Experience with embedded or similar systems (e.g. Pi, Arduino, etc)


Whilst SensePost is an information security company, this specific internship does not directly relate to an info-sec position, but the projects worked on will relate to info-sec. The internship is for placement in the Innovation Centre. Day to day tasks are likely to include:


* Writing PoC scripts
* Providing support to InnoCentre analysts (e.g. writing Maltego plugins, debugging issues, testing new hardware/software).
* Liaising with partners/clients

Tue, 5 Aug 2014

SensePost partners with Paterva to offer improved security intelligence

SENSEPOST PNG on clear
We've been big fans of Maltego and the team at Paterva for a very long time now, and we frequently use this powerful tool for all kinds of fun and interesting stuff, like

We go way back with Andrew and Roelof, who was in fact a founder of SensePost, so today we're super excited to be able to announce a new, strengthened partnership with them under which we have been accredited as an Approved Maltego Solutions Provider. Basically this means the that with Paterva's help we plan to use the powerful Maltego toolset to become better at our job - that is to provide information and information systems to our customer with which they can make sound security decisions. Here's the official news:
SensePost today is proud to announce the completion of a contract that will see the company recognized as the world's first “Approved Maltego Solution Provider” (AMSP) and the exclusive provider of this kind in the UK and Southern Africa.


SensePost was founded in 2000 and has developed into one of the worlds leading Information Security Services companies with offices in London, Cape Town and Pretoria. As trusted advisors it has always been our mission to provide our customers with insight, information and systems to enable them to make strong decisions about Information Security that support their business performance. Whilst this mission has traditionally expressed itself in technical security analysis services like Vulnerability Assessment and Penetration Testing we recognise that the threat landscape is constantly changing and that new and more complex realities necessitate the use of sophisticated new skills, tools and techniques with which to support our clients.


“This strategic alliance perfectly fits the ‘Assess-Detect-Protect-Respond' framework that drives the way we design, sell and deliver our service. It's the perfect evolution of our growing services offering.” says Etienne Greef, CEO of the SensePost group holding company SecureData, who's strategy is at the core of this new initiative.


‘Maltego', built by Paterva, is a powerful suite of software tools used for data mining, link analysis and data visualization, giving the user the ability to extract large volumes of data from diverse sources and then analyze it to understand the patterns and relationships it reveals. In the modern digital age these techniques are used to convert data into information and thereby extract concrete value that can be used for effective decision-making.


Maltego is a highly regarded and popular platform used extensively in Open Source Intelligence Gathering, Infrastructure Analysis for Penetration Testing, Cyber Attack Analysis, Fraud Detection and Investigation, Security Intelligence, Information Security Management, Research and more.


This partnership between SensePost and Paterva (who produce the Maltego software) builds on the companies' shared roots and intellectual heritage and will allow both companies to serve their customers and fulfil their respective missions better.


As an AMSP SensePost will be authorised to provide integration, consulting, support and training for the Maltego tools with full endorsement, support and assistance directly from Paterva. This new capability, combined with an existing wealth of information security skills and experience, uniquely positions SensePost to advise and support clients seeking to exploit the unique strategic advantage the Maltego toolset can offer.


More information on our services and capabilities in this space will follow with our official "launch" in a few weeks time. In the mean, here's a brief summary of our new offering.