BigBrother is an alias observed in claims of data sales or leaks on underground forums. The FamilyBox.Store case is cited as a claim by the actor, not as an independently confirmed breach.
On May 11, 2026, a threat actor known as BigBrother posted on a dark web forum claiming to be selling 1,100,000 records of personally identifiable information (PII) from FamilyBox.Store, an online supermarket associated with the TEALCA Group. The compromised data reportedly includes customer IDs, names, email addresses, phone numbers, physical addresses, and order details. The threat actor provided sample data via a file-sharing link on ufile.io.