Marian Croak

Description

Marian Rogers Croak is a Vice President of Engineering at Google. She was previously the Senior Vice President of Research and Development at AT&T. She holds more than 200 patents. She was inducted into the Women in Technology International Hall of Fame in 2013. In 2022, Croak was inducted into the National Inventors Hall of Fame for her patent regarding VoIP (Voice over Internet Protocol) Technology. She is one of the first two Black women to receive that honor, along with Patricia Bath. Her invention allows users to make calls over the internet instead of a phone line. Today, the widespread use of VoIP technology is vital for remote work and conferencing. - Wikipedia Entry

Chal: Find the discarded flag and return it to this Hall of Fame Inventor

Attachments

Disk Image or Voip.zip

Solution

• Running fls on the image file gives us the following output:

  $ fls disk.img
  d/d 11:	lost+found
  r/r 14:	flag.txt
  V/V 12825:	$OrphanFiles

• We can see that there is a flag.txt file in the image file.

• Running icat on the image file, we get a fake flag:

  $ icat disk.img 14                                                                                                   
  chctf{fake_flag_it_is}

• Using the Sleuth Kit CLI was of not much use.

• Opening the image file in Autopsy and looking at the Deleted Files tab we see a .pcap file.

• We can recover the deleted .pcap file and open it in Wireshark.

• Open the pcap file and look for VoIP Calls (Telephony > VoIP Calls)

• Listen to the last audio from testuser and we get the flag.

FLAG

chctf{d3v3l0p3d_vo1c3_0v3r_1p}