This file is a dump of information I could find about Cicada 3301. Some things may be wrong, this is only a archive to prevent information loss over time.
It dates back to Jan. 8 2012 - Jan. 11 2012
URL : https://warosu.org/sci/thread/4229423
Backup : see '2012 thread.png'
The thread also contains a copy of the timer for 845145127.com : (Contrary to what's often shown on documentaries about 3301, the countdown is in Red. This is confirmed by a very-low resolution picture seen in the archived thread)
<html><head><title>845145127</title><style>body{background-color:#ffff
ff;text-align: center;}</style></head>
<body><img src="/cicada.jpg" title="Patience is a virtue." /><br />
<span style="font-family: helvetica, arial, sans; font-size: 130%;">
<script language="JavaScript">
TargetDate = "1/9/2012 5:00 PM UTC";
BackColor = "white";
ForeColor = "red";
CountActive = true;
CountStepper = -1;
LeadingZero = true;
DisplayFormat = "%%D%% Days, %%H%% Hours, %%M%% Minutes, %%S%% Seconds.";
FinishMessage = "Reload this page.";
</script>
<script language="JavaScript" src="http://scripts.hashemian.com/js/countdown.js"></script></span>
</body></html>
Some anons also report that the 845145127.com server had other ports open : FTP, SSH (and "a XMPP client" and "S2S servers"). The fact that a FTP server existed is confirmed by a recap pastebin from that time : https://pastebin.com/q4s2Jkfe (also found in that thread) This hackforums post also mentions its existence: https://hackforums.net/showthread.php?tid=2100188
Supposed location of the second 2012 Seoul poster : https://www.youtube.com/watch?v=yUvK-fI0kZU
For context, watch the other videos.
The QR Code on the picture isn't readable. miami_qr_code.png is an attempt to re-create it manually. It now correctly scans, however zbarimg indicate 10 errors. So, my recreation might not be perfect.