The activity of the Lumma Stealer (aka Water Kurita) information stealer has witnessed a "sudden drop" since last months after the identities of five alleged core group members were exposed as part of what's said to be an aggressive underground exposure campaign dubbed Lumma Rats since late August 2025. The targeted individuals are affiliated with the malware's development and administration, with their personally identifiable information (PII), financial records, passwords, and social media profiles leaked on a dedicated website.
All individuals with access to or knowledge of an organization's computers, networks, facilities, information, or personnel are potential insider threats, including vendors and contractors. The ability to intentionally use or accidentally misuse any of this information can breach confidentiality, reveal trade secrets, cause a data security incident, or harm an organization's personnel, ultimately impacting its reputation and ability to do business.
Sensitive data loss episodes can have reputational, financial, legal, and regulatory consequences. CISOs need to have their data leakage defences and best practices in place.
