2014 Moldovan bank fraud scandal
In 2014, $1 billion disappeared from three Moldovan banks: Banca de Economii, Unibank and Banca Socială. This bank fraud was a coordinated effort involving all three banks working together to extract as much loan finance as possible from the banks without any obvious business rationale.
Source: Wikipedia — 2014 Moldovan bank fraud scandal (CC BY-SA 4.0)