The personal data of more than 17,300 clients of Australian estate agent MMJ Real Estate has potentially been exposed in a data breach.
A hacker calling themselves 2019 – the same threat actor behind breaches of the Melbourne International Film Festival (MIFF) and the Australian Centre for the Moving Image (ACMI) – published the data in a 1 June post to a popular hacking forum.
The data listed by the hacker includes full names, emails, mobile phone numbers, addresses, details of business interests, and the property price ranges that customers are interested in. Also included are the timestamps of inquiries.
According to threat intelligence platform Daily Dark Web, such a collection of data could be a goldmine for further compromises.
“If authentic, exposure of real estate customer data could create opportunities for targeted phishing, business email compromise, real estate fraud and social engineering attacks,” a Daily Dark Web analyst said in a post to X.
“Property transaction-related information is often valuable to threat actors because it can be leveraged in highly convincing impersonation campaigns.”
MJJ Real Estate has not responded to Cyber Daily’s request for comment.
Who is 2019?
The threat actor, 2019, has been active on hacking forums since early 2026 and has listed more than 20 victims across various breach posts.
Australian organisations are their most common target, followed by entities in the United States, France, Italy, and New Zealand.
Who is MMJ Real Estate?
Founded in 1960, MMJ Real Estate has offices in Perth, Wollongong, and Corrimal, offering property services including valuation, strata management, marketing, and town planning.
The company lists 128 employees on its website.
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David Hollingworth
David Hollingworth has been writing about technology for over 20 years, and has worked for a range of print and online titles in his career. He is enjoying getting to grips with cyber security, especially when it lets him talk about Lego.