There are several things to note here.
As noted by Nathan There are four characters for each character.
This points to possibly a hash of some sort. It isn't md5 of course.
However we cant say that SLHB = s since the key scheduling could easily do some rotation on the plaintext
There is very poor randomness in the ciphertext.
There are 4 'w', 3 'd' and then mostly 2 of each character.
This coincides with the randomness in the plaintext which has 3 's', 2 'f' and then 1 of the remaining characters
It also points to that the cipher doesn't contain many rounds of substitutions.
The ciphertext consists of only characters from the alphabet, this takes most
ciphers out of the picture. This is consistent with some fairly simple substitution cipher.
Repeated patterns occur, QAQ, PVP, WGW, JTJ as noted by flava.
When I look upp firebird password recovery on google it tells us that it is impossible to recover passwords.
This is because it is a one-way hash. But the ciphertext is most certainly not a sha-1 hash which apparently is used by firebird. http://ibexpert.net/ibe/index.php?n=Doc ... nFirebird2
has some interesting information.
I suggest you find out if the firebird version that has made that entry does anything to data that it stores. But I would say that that password is not something generated by firebird at all. Find more information, you might not get it cracked but the non randomness of it tells me it should be possible.