Trojan.Poweliks: A threat inside the system registry

According to the article : https://www-secure.symantec.com/connect/blogs/trojanpoweliks-threat-inside-system-registry  there are 2 IPS signatures available listed as the folllowing:

Intrusion Prevention
 

• System Infected: Trojan.Powelik Activity
• Web Attack: Angler Exploit Kit Website 12

I have located both signatures in SEP 12 except that System Infected: Trojan.Powelik Activity is not available in SEP 11.  Does anyone know if this is only applicable to SEP 12 and not SEP 11 for this definition.?

Thanks