writeup

Picture Lab: Activity 10 Category: Forensics Points: 100 Description: Dear APCSA students, You thought you were done with Picture Lab. Unfortunately, you were wrong. We’re sorry. We should not have pushed this challenge out, it was irresponsible for us to deploy a meme challenge in the middle of a very serious “Catch-The-Flag” competition. We originally wrote this challenge as a joke, hoping that it would poke fun at Collegeboard’s APCSA “Picture Lab”; however, we now realize that this decision was insensitive and outright disrespectful to all those who have to solve the challenge....

AP Lab: English Language Category: Reverse Points: 100 Description: The AP English Language activity will ask you to reverse a program about manipulating strings and arrays. Again, an output will be given where you have to reconstruct an input. Author: AC Given: EnglishLanguage.java & a pdf Writeup We can see right away that we have a .java file. I loaded up Eclipse and opened the .java file there....

Blurry Eyes Category: Web Points: 100 Description: I can’t see :( https://blurry-eyes.web.hsctf.com Author: meow Writeup After clicking on the link, it takes us to a website with information on CTFs. We see that it says that our flag is … and is then blurred out. Best think to do is to Right-Click and “View page source”. Looking at the HTML, we don’t see anything useful besides the CSS class used for the flag....

Sensitive Category: Forensics Points: 150 Description: Author: Lumpus Hint: “Not sure what to make of this…” Given: File named “sensitive” Writeup The file didn’t have any extension added to the end so I couldn’t tell the type of file, so I ran the “file” command on Linux. It told me it was a data file, which doesn’t give much help. I opened the file in HxD (a hex editor) and noticed that it was a PDF via the header and footer....