ALL.MN CTF 2019 - Archive

https://archive.org/web/
Search "http://saturn.mn" at WaybackMachine, I got the archive of this site.

And I found the archive which saved at February 21st , 2015.

I found 3 archives on this day(15:27:16, 17:11:06, 18:42:42).

I refered the most old one(15:27:16) .

Open the saved html file(Saturn.mn.html) by text editor, I found following description.

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 /*-----------------------------------------------------------------*/
/*--------------------------Start Logo Styling---------------------*/
/*-----------------------------------------------------------------*/
/*--Set Logo Image position and locate logo image file--*/
#logo{left:20px}
#logo{top:40px}

h1.logo a {background: url(/web/20150221152716im_/http://www.saturn.mn/images/a1.jpg) no-repeat; z-index:1;}
/*--End Set Logo Image position and locate logo image file--*/

***************************************************

Described as follows : "find the name of logo of Saturn.MN"

So I think "a1.jpg" is the best answer.

Described as follows : "Flag:ALLMN{name of the logo}(don't contain png,jpg,jpeg)"

So I submit the flag as "ALLMN{a1}", but it failed...

So I guess, the flag is not the file name, the alt-attribute of the logo file is the flag.

I found following description in the Saturn.mn.html.

***************************************************

 <div id="container_logo_menu_mobile" class="container"><div class="wrapper960">
<div id="logo_mobile">

<a href="https://web.archive.org/web/20150221152716/http://www.saturn.mn/index.php"><img src="./Saturn.mn_files/logo_mobile.png" alt="default_mobilelogo"></a>

</div>

***************************************************

I was not confident in this answer, but it was correct when I submitted it.

The flag is: ALLMN{default_mobilelogo}