JayDDee's cpuminer-opt compiled to support scrypt-nah for Strayacoin.
All mining programs are automatically flagged as threats. cpuminer-opt is not a virus, backdoor or anything else malicious; you will have to add an exception for it like all other mining programs.
Currently, the only mining pool that supports scrypt-NAH that I am aware of is my own, at https://pool.larahelpers.com.
Mining pools have to modify their stratum server code to support scrypt-NAH. The pool at larahelpers.com (despite saying scrypt) actually tests for scrypt-NAH hashes.
Point your miner there with:
cpuminer.exe -a scrypt -u <your wallet address> --hash-meter -o stratum+tcp://pool.larahelpers.com:3433 -p c=NAH