It will then xor that result byte by byte with some text in the file, and write the result to 11.7z. #Pop pass brute force pcap wireshark plus#It will open and read the file, and split it based on the second input string plus a newline, and take the last result. The Python script is simple, taking two arguments. The data base64-decodes to the same Python file that is offered as a download. Safari and IE users, save the Base64 data and decode it manually please,Chrome/edge users CORS, move to firefox.īASE64 data="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" #Pop pass brute force pcap wireshark password#This function checks for a password to see if its SHA1 hash matches a static value, and then does a bunch of decoding and drawing, and eventually calls the download function. There’s a SHA1 function, which I tested in the console and does perform an actual SHA1-hash, and a B64 function which does seem to do legit base64 encoding.įunction dID () JSNice is a good way to clean up and make readable the script. View-Source doesn’t seem to work on the page, but looking in the dev console, the script is there: Clicking in the picture causes some whitespace to appear on top of the image (pushing it down the page) and a text area to appear under it, empty. html extension, it opens in Firefox and shows the picture. I spent some time trying to cut the HTML page out of this file and get it to work, but it turns out the entire file is a polyglot, functioning as both an image or an HTML page. Looking at the file in a text editor, there’s HTML tags including a block of JavaScript not too far from the top: Starting with the image, binwalk shows embedded files within it, including an HTML page: You should definitely give Bread’s famous easy perfect fresh rosemary yeast black pepper bread a try this Christmas! Solution HTML Page Ten (twentyfourpointone) pieces a-puzzling, On the twelfth day of Christmas my true love sent to me… There was also more web exploitation of a Tomcat deserialization CVE, a really interesting ELF reversing challenge, and pulling data from an iOS backup. I really liked one that was another polyglot file where an image turned into an HTML page that dropped a Python script which pull out a docker image containing images that contained a flag. My favorite was a binary and a PCAP of an attacker exploiting the binary, where I needed to reverse the crypto operations in the binary and the exploit to recover the data that was stolen. The leet challenges started on day 20, but then followed an additional three hard challenges before the second and final leet one.
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