Problem with simple HEX passcodes

[wax]

Hi.

Bitcoin wallet for test. 
Hashcat Version 6.1.1 windows10

Password i search is: "Ü ä"  in Hex: dc 20 e4
Hash is: $bitcoin$64$735c685b5c559220293ed490445d8979a9c77fcd1df4496a0c7e714df9181841$16$09799f55e665c8a2$198010$2$00$2$00

Command i run:
hashcat.exe -w 1 -m 11300 -a 3 "$bitcoin$64$735c685b5c559220293ed490445d8979a9c77fcd1df4496a0c7e714df9181841$16$09799f55e665c8a2$198010$2$00$2$00" ?b?b?b


result = nothing found.  Why?

if i try simple ones like "ab c" and its working,, it finds "ab c", but not "Ü ä"  whats wrong?

[undeath]

You're using the wrong encoding. The hex for the password you are looking for is c39c20c3a4

[wax]

You're using the wrong encoding. The hex for the password you are looking for is c39c20c3a4

Yes. You meant: 

Code:

--hex-charset -1 c39c20c3a4 ?1?1?1

    this?

thats not workink too.. so i tryed ?b for all from 00-FF

[undeath]

No, your password consists of 5 bytes.

--hex-charset -1 c39c20c3a4 ?1?1?1?1?1

this would work

[wax]

totaly forgot about UTF-8 and longer Hex C3**   

--hex-charset -1 c39c20c3a4 ?1?1?1?1?1  worked 

so every strange acsii making the code longer by 1.. thats getting worst if i have a mixed password....

"abc" is ?1?1?1  3-long  vs "üöä" is ?1?1?1?1?1?1  6-long

so this will do the trick? 
hashcat.exe -w 1 -m 11300 -i --increment-min 3 --increment-max 6 -a 3 "$bitcoin$64$735c685b5c559220293ed490445d8979a9c77fcd1df4496a0c7e714df9181841$16$09799f55e665c8a2$198010$2$00$2$00" --hex-charset -1 c39c20c3a4 ?1?1?1?1?1?1

i can work on with this now...  Thx

But how can i limit the password length now? 

better i feed a Wordlist...