1. Navigate to Bruteforce Save Data Installation, find games.conf file
ps3tools>tools>BruteforceSaveData>games.conf
2. Open with Notepad++ (or similar tools)
3. Press Ctrl+F, type underworld
4. In Line 5644
; "The Tomb Raider Trilogy" (TRUNDERWORLDAUTO)
[BLUS30718/BLES01195]
;disc_hash_key=
secure_file_id:TRSAVE.DAT=CC0D00460921694569216D30 0A4BEE7A
secure_file_id

ROFILE.DAT=CC0D00460921694569216D3 00A4BEE7A
secure_file_id:*=5452554E444552574F524C444155544F
5. Replace the secure_file_id value with this key 5452554E444552574F524C4453415645
6. Save the file
7. Open Bruteforce, resign the save again.