Afghan Taliban are not equipped for warfare like a European country but they have their methods to create insurgency. They are able to blend in with the locals and collect INTEL to determine targets and strike at the time of their choosing. They incorporated suicide attacks and IEDs in their tactics to devastating effect from time-to-time.
They were able to obtain advanced equipment from the Afghan National Army (ANA) in various battles. They had sourced manpads and used them to shoot down helicopters when possible. Examples in following footage:
THE Taliban have claimed they shot down an Afghan military helicopter before slaughtering troops at a checkpoint in its latest terror rampage. Taliban spokesman Zabihullah Mujahid said the chopper …
www.thesun.co.uk
They are known to use terrain to their advantage in particular. They were able to kill hundreds of British troops in Helmand province for instance.
Afghanistan is called graveyard of Empires in modern times for a reason.