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Hackvent 2019: Day 8

08 Dec 2019

Challenge HV19.08 SmileNcryptor 4.0

Dump-File: dump.zip Solution We download the zip file and extract the dump.sql file within. It contains the database schema for some credit cards as well as our flag. First we look at the flag insert statement:

The prefix and postfix of the flag is stored explicitly in different fields. We…read more.

 
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Hackvent 2019: Hidden 2

08 Dec 2019

Challenge HV19.H2 Hidden Two

For easy download, get it here: HV19-SantaRider.zip Solution During the Day 7 challenge HV19.07 Santa Rider, we notice there is a ZIP file available to download. This ZIP file has the typical guid file name and contains one file called 3DULK2N7DcpXFg8qGo9Z9qEQqvaEDpUCBB1v.mp4. The inner MP4 file has the same hash as the…read more.

 
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Hackvent 2019: Day 7

08 Dec 2019

Challenge HV19.07 Santa Rider

Resources: For easy download, get it here: HV19-SantaRider.zip Solution We watch the provided video and notice that about half way through the LEDs light up in an interesting order. There are 8 total LEDs and multiple LEDs light up at once so we think that this may be hidden binary messages…read more.

 
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Hackvent 2019: Hidden 1

06 Dec 2019

Challenge HV19.H1 Hidden One

Solution During the Day 6 challenge HV19.06 bacon and eggs, we notice there is a lot of suspicious whitespace (space and tab) characters after each line of statistics about Francis Bacon. As the theme for this challenge was crypto, we Google search for white space cipher. One of the first…read more.

 
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Hackvent 2019: Day 6

06 Dec 2019

Challenge HV19.H1 Hidden One Francis Bacon was an English philosopher and statesman who served as Attorney General and as Lord Chancellor of England. His works are credited with developing the scientific method and remained influential through the scientific revolution. Bacon has been called the father of empiricism. His works argued for the possibility of scientific…read more.

 
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Hackvent 2019: Day 5

05 Dec 2019

Challenge HV19.05 Santa Parcel Tracking

Image mirror: Solution Initially we try scanning the barcode as it looks like a Code 128 barcode. It works but gives us the string Not a solution which is unfortunately a dead end. After a lot of experimentation, we manually note down the hexadecimal values for each colour in sequence. We decided to…read more.

 
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Hackvent 2019: Day 4

05 Dec 2019

Challenge HV19.04 password policy circumvention

File mirror: HV19-PPC.zip Solution We download this zip file and extract it to find a HV19-PPC.ahk  file. We know that ahk files are AutoHotKey files. Upon inspecting the ahk file we find that this is in fact the case. The script seems to move the cursor around and type…read more.

 
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Hackvent 2019: Day 3

03 Dec 2019

Challenge HV19.03 Hodor, Hodor, Hodor

Solution At first this looks like it may possible be a hidden code with different variations of hodor mapping to English alphabet characters. However, before we look into frequency analysis we do a Google search for hodor programming language and discover that such an esoteric language exists! We find an online…read more.

 
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HACKvent 2019: Day 2

02 Dec 2019

Challenge HV19.02 Triangulation

File mirror: a5f47ab8-f151-4741-b061-d2ab331bf641 Solution We know that a stl file is 3D model file. Thus naturally we open this file up in a 3D model viewer. On Windows we initially attempt to use 3D Builder. From the hint that says to ‘not break it’ so we really want to break it and look…read more.

 
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HACKvent 2019: Day 1

02 Dec 2019

Challenge HV19.01 censored

Solution The hint indicates that we should have a clearer smaller image available to us. At first we attempt to shrink the image, resharpen and enlarge but there is too much degradation for that to work. We also open the image in GIMP and mess with levels/contrast with no luck. Finally,…read more.

 
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