In my free time, I like to do some bug bounty hunting. For some reasons, I’ve been doing this almost exclusively for Swisscom. One of the reason is that the scope is very broad and I like to have this vast landscape full of possibilities. While preparing the talk we had at BlackAlps (https://www.blackalps.ch) with […]
Have you ever said something and later regretted it? Or written an email to someone and then wished it had not happened? Or sent an SMS message but afterward desired to change its content? Well, replacing the content of previously sent SMSs is actually possible. SMS messages can be constructed in one of two modes: […]
Contents Introduction Attack Overview Step-by-Step Detection Email Clients Administration Tools Exchange Compliance Features MAPI Editor Eradication Microsoft Security Response Center Swiss Cyber Storm 2018 Conclusion References Introduction In recent investigations, Compass recognized a raise in popularity for attackers to compromise Microsoft Exchange credentials. As one of the first steps after having obtained the credentials (most […]
Introduction Last Friday and Saturday (15./16. June 2018), the 6th edition of the security conference Area41 (formerly Hashdays, https://area41.io/) organized by DEFCON Switzerland (https://www.defcon-switzerland.org/, https://twitter.com/defconCH) took place in Zürich. Every Compass security analyst can attend two conferences every year supported by Compass. So most of the analysts decided to go to the Area41 this year […]
We are at the Area 41 conference! This IT Security Conference is happening on the 15/16th of June in 2018 in Zürich. Compass Security supports this non-profit event as Platinum Sponsor. We’ll have a Compass Booth where we discuss current topics with you – and how you can join our team as ethical hacker! The […]
As every year, some Compass Security Analysts travelled to Geneva and attended the Insomni’hack conference and it’s enjoyable CTF.
For this task, we had SSH access to the server guess.insomni.hack and the task was to read the flag in the /home/flag directory. We were able to get the flag without even solving the challenge :)
Similar to the previous challenge we were provided with an Excel spreadsheet (vba02-bitminer_4052500b4f2120d3d3ae458b339ec1f16e89e870.xls) that again contained macro code that would be executed when opening the document.
In this challenge we were provided with an Excel spreadsheet (vba01-baby_272038055eaa62ffe9042d38aff7b5bae1faa518.xls). Analyzing the document using olevba (https://github.com/decalage2/oletools/wiki/olevba) quickly revealed that it contains obfuscated VBA macro code that is executed when the document is opened. Challenge Description Our Solution
The vbaby challenge was a simple ASP web application that accepted a single page parameter. We initially thought that it could be a local file inclusion vulnerability and therefore tried a path traversal attack:
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