Any one have an idea regarding Show_Password.exe (Malware) which cannot be detactable by Symantec Endpoint Protection 12.1.

Please submit to symantec

Scanning a file with a competitor's antivirus program detects a virus, but scanning with Symantec Endpoint Protection does not

http://www.symantec.com/business/support/index?page=content&id=TECH98929

Using Symantec Help (SymHelp) Tool, how do we Collect the Suspicious Files and Submit the same to Symantec Security Response Team

http://www.symantec.com/connect/articles/using-symantec-help-symhelp-tool-how-do-we-collect-suspicious-files-and-submit-same-symante

How to run Symantec Power Eraser with the SymHelp utility

ZIP the file and submit it to Symantec, they will review it and would take necessary action.

https://submit.symantec.com/websubmit/gold.cgi

First you can analysis the virus from http://www.threatexpert.com/ for the virus result

submit the virus to Symantec Security team

https://submit.symantec.com/websubmit/essential.cgi

How to run Symantec Power Eraser with the SymHelp utility

http://www.symantec.com/docs/TECH203683

Security Response recommendations for Symantec Endpoint Protection 12.1 settings

http://www.symantec.com/docs/TECH173752

Security Best Practice Recommendations

http://www.symantec.com/docs/TECH91705

How to scan in safe mode with Symantec Endpoint Protection 12.1 RU1 MP1 and earlier

http://www.symantec.com/docs/TECH176971

Scanning in Safe Mode is no longer possible with 12.1 RU2 and later

http://www.symantec.com/docs/TECH205872

Is your system infected? Symantec tools to help clear an infection

https://www-secure.symantec.com/connect/forums/your-system-infected-symantec-tools-help-clear-infection

Symantec Endpoint Protection – Best Practices

http://www.symantec.com/page.jsp?id=stopping_malware

Is their any update?

This video and illustrated guide may help:

How to Run Load Point Analysis for Symantec Support
http://www.symantec.com/docs/TECH203028