Water Saci, also known as Augmented Marauder, is a Brazilian e-crime group that emerged in October 2025 with the primary motivation of financial theft. The group is distinguished by its aggressive, self-propagating malware campaigns that extensively leverage WhatsApp Web for distribution and social engineering tactics. Water Saci notably employs an email-based command-and-control infrastructure and has shown a rapid evolution in its adversarial capabilities, including a recent shift towards incorporating artificial intelligence for code conversion and enhanced evasion.