Belsec Blog has more details, but it looks like Tobasco.be and Z-Staffing.org are having their data leaked because they didn’t meet Rex Mundi’s demands. The data leak reportedly does not include national registry numbers, but the hackers are believed to be in possession of bank account numbers that have not (yet?) been leaked.
Belsec Blog took Tobasco to task for their lack of security for their online application form.