Implement AES-CTR on top of AES-ECB
Yes, you can do this.  In fact, implementing other cipher modes is precisely what ECB mode is good for (and, indeed, just about all it is good for).

To implement AES-CTR, simply fill an array of 128-bit blocks with increasing counter values, encrypt it with AES-ECB and XOR the resulting keystream with the plaintext (for encryption) or ciphertext (for decryption).