This attack could pose a serious security threat. You should take immediate action to stop any damage or prevent further damage from happening.
This signature detects traffic generated by Trojan.Malscript which could lead to further infection of the affected system.
Trojan.Malscript is a heuristic detection for Web-based malicious script files that exploit vulnerabilities and/or perform heap spraying.
Files that are detected as Trojan.Malscript are considered malicious. We suggest that any files you believe are incorrectly detected be submitted to Symantec Security Response. For instructions on how to do this using Scan and Deliver, read Submit Virus Samples.