Namaste,
I've come accross this web site of Lord Kartikeya devetees, there are differentmantras there including mala mantra: Sathru samhAra thirisathi - 1 - SathyAyutha archchanai - rendition by Sri P. VenkatrAman SivAchAriyAr
Hopefully, that is still relevant for you.
Om Shanti.
Ramapati