It is blacklisted here: htxp://dl.desktop.weibo.com/Weibo_Silent_1.8.3.23465.exe is in Dr.Web malicious sites list!
Probably harmless: https://www.virustotal.com/nl/file/40b213ded90bfeda38d3bc9bc72e41d799a4623215b0e04830e07fde173a8873/analysis/1384489220/
IDS alerts: http://urlquery.net/report.php?id=3644746
Dead and active malware at IP: http://support.clean-mx.de/clean-mx/viruses.php?ip=222.218.45.180&sort=id%20DESC
avast does not detect Packed.Win32.MUPACK.~KW here…
pol