Alternate Data Streams (ADS) have been present in modern versions of Windows for a long time. If you are using a NTFS filesystem, you can bet that you are using them. As penetration testers, we can use that OS-specific feature in our advantage. In the following posts information required to understand and identify potential ADS-related issues will be provided. This post will provide the required background to understand some common scenarios that could be useful during the penetration testing engagements. Continue reading