This indicates a possible attempt to exploit a memory-corruption vulnerability in Xunlei Thunder.
The vulnerability is located in the "DapCtrl" DLL ActiveX control through misuse of the "Put" method. It may allow remote attackers to execute arbitrary code in the context of the application using the affected ActiveX control.
Thunder 5, DapCtrl.dll 1.5.578.28 and later versions.
System Compromise: Remote attackers can gain control of vulnerable systems.
Upgrade to the latest version or set the kill-bit on the given ActiveX control component.