This indicates an attempt to exploit a code execution vulnerability in Symantec Altiris Deployment Solution.
The vulnerability is located in the "AeXNSPkgDLLib.dll" ActiveX control through miss-use of "DownloadAndInstall" method. It may allow remote attackers to download and install arbitrary files in vulnerable systems.
Symantec Altiris Deployment Solution 6.9 sp3
System Compromise: Remote attackers can gain control of vulnerable systems.
Set the kill bit for the affected ActiveX control.