Yes and No.
The only reference I find to Backdoor.APT.NS01 is an article by Fireeye.
https://www.fireeye.com/blog/threat-research/2013/04/the-mutter-backdoor-operation-beebus-with-new-targets.html
The sample FireEye named Backdoor.APT.NS01 in this report is detected by Symantec as Trojan.gen.2
https://www.virustotal.com/en/file/f90dee13eee2d2bfa7df31bbae6fc86e907be38a297e97bd1cbfc7a2b4ffd7e0/analysis/
Unfortunately this is no guarantee that Symantec detecs other morphed versions of this malware.