Usually ps2-0230a-20080220.bin or listed in dumps as SCPH-90001_BIOS_V18_USA_230.bin .
Ironically, people search for the 90001 BIOS because they cannot softmod it. They are looking for technical workarounds to install FreeDVDBoot or FunTuna. (Note: The SCPH-90001 requires either a physical Modbo modchip or a "Fortuna Project" exploit, not a standard FMCB memory card). ps2 bios scph 90001
The SCPH-90001 BIOS is a 4MB file. Cybercriminals exploit its demand by packaging malware, keyloggers, or coin miners inside "BIOS pack" zip files. According to security reports, searches for rare BIOS files like the 90001 are 3x more likely to lead to malicious downloads than common game ROMs. Usually ps2-0230a-20080220