The npm package @wanzlonely/bails4u versions 2.0.0, 3.0.0, 4.0.0, and 5.0.0 are malicious forks of the Baileys WhatsApp Web library. These versions contain injected code that silently subscribes the victim's WhatsApp account to attacker-controlled channels using the victim's authenticated session. The malicious code does not steal credentials, establish persistence, or execute arbitrary remote code, and the targeted channels are obfuscated or dynamically fetched to evade detection.