Whatever it is, the encrypted version is Base64-encoded. Here's a hexdump without the Base64 encoding.
00000000 29 67 02 94 c3 c7 1a c1 d6 cb aa 3c 55 5d 7f d8 |)g.........<U]..|
00000010 8d f3 bf ca 44 36 a7 ee 8f 06 f7 3c 51 c6 f2 c5 |....D6.....<Q...|
The decoded ciphertext is 32 bytes (256 bits), while the plaintext is 16 bytes (128 bits). I think this suggests a 256-bit block cipher. (Or maybe 128-bit block, especially if the input included a trailing newline or something?) That doesn't narrow it down all that much, and if you don't have the key I'm not sure it's possible to narrow it down any further.
