Win32.Nark is your typical backdoor Trojan.  It is a dual part system that works in conjunction with its hacker in order to fulfill the complete purpose of its mission, which is to gain control of the targeted machine.  Once it has gained initial entry, it will wait at a specified port for further word from the hacker.  From there it will proceed to follow the rest of the instructions.  Backdoor Trojans are extremely dangerous and pose even more of threat than viruses because of their ability to allow for hackers to view and ultimately control your PC.

AKA:
Troj/Nark-B
Backdoor.Nark.B
BKDR_NARK.B
Win32/Nark.B
Nark.B Backdoor

Related Files:
4F3F749F.EXE

Category:
Backdoor Trojan

Recommended Action:
Remove at once.

The manual process of removal is not without difficulty.  Because these programs are designed to be problematic to detect, it can be a challenge to be certain you have eliminated all the files needed.  If you are comfortable, then proceed with locating and extricating all files, folders, registry values and keys related to Win32.Nark.

Another option is an automatic application designed to detect and remove in one system.  ZookaWare PC Cleaner is an award-winning anti-spyware application designed to take the guesswork out of spyware removal.  With a few clicks, you are free of spyware and all of the work is done for you.