Hello everyone, this time I bring writeup offensive and misc part MISCall world for everyone.
Before I begin to talk about a few problem-solving, solving this question thanks to some of the Linux command, it is recommended to look at before writeup first look.
Well, Closer to home, to download the attachment, an unknown file is found, then binwalk it.
Found a bzip2 compressed format, then use the command unzip it.
There is a ctf found a folder, see a flag after entering. Open look, however, there are no flag.
Then we note that there is a .git folder, so we take into account the Git may be leaked, so we use git stash show to look at the file was made what changes.
I found a flag text and a python script, and then extracted.
But here to remind us that after the first flag existing text deleted in order to extract the files. So we first flag and then extract text deleted.
Direct view flag text and found a bunch of English, certainly not the flag, then we think there is a python script, and then run it.
A syntax error, missing parentheses after print, then enter vim (file name followed by a space) into the text editor, hold down i to enter edit mode, after editing press Esc to exit edit mode, then hold down the Shift plus: can inquire into the state, enter wq! to save your changes and exit, run the script again to correct the error.
Get flag: NCN48d76c96f6f9cebc0e8fc014078b9fd4ce483fb6.
