FE01 - 100pts


Download the file and find a way to get the flag. Contents: fe01.ost
Challenge Files:


  1. 1.
    We can run file fe01.ost to determine that fe01.ost is a Microsoft Outlook email folder.
  2. 2.
    Searching online for a program that can read this identifies pffexport, which can be installed with sudo apt install pff-tools.
  3. 3.
    We can extract the content with pffexport fe01.ost and cd into fe01.ost.export.
  4. 4.
    Run find . -type d -empty -delete in fe01.ost.export to delete all empty directories.
  5. 5.
    Searching the folder for flag shows that Root - Mailbox/IPM_SUBTREE/Inbox/Message00018/Attachments has a ZIP file called 1_flag.zip (as an attachment to the Message00018 email) that is password protected.
  6. 6.
    Looking around some more reveals that the calendar contains the key. Root - Mailbox/IPM_SUBTREE/Calendar/Appointment00001/Appointment.txt has the name c][email protected]/z}Z!Q - 11am meeting with Chris so c][email protected]/z}Z!Q is the password.
  7. 7.
    Extracting the 1_flag.zip with c][email protected]/z}Z!Q as the password shows an image flag.jpg with the flag in it.


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