Which of the following tools is an asterisk password revealer tool?

Aircrack is a wireless network security suite used for capturing packets and cracking WEP and WPA/WPA2 encryption keys, not for revealing asterisk-masked UI passwords.

SnadBoy's Revelation works by hooking into the Windows API to read the actual plaintext content of password fields that display only asterisks in dialog boxes and web forms. It is the tool specifically built for this single purpose - uncovering asterisk-masked credentials in the Windows UI. None of the other listed tools are designed primarily for this function.

Cain and Abel is a multipurpose credential recovery tool focused on network sniffing, hash cracking, and ARP poisoning - it is not classified primarily as an asterisk password revealer.

Pwdump3 is a Windows tool that extracts NTLM and LM password hashes directly from the SAM database, not a tool for reading asterisk-masked passwords from UI fields.