a google search results in a number of hits, some linked to sites about Our Lady of Good Success, title by which she is venerated in Ecuador. this one, a reprint of an account by a priest used allegedly in her beatification process, seems to be most descriptive, and the forward by the modern translator claims her apparitions and prophesies were approved by Ecuadoran bishops contemporary with those events.
traditioninaction.org/tiabk016_AdmirLife1.htm
there seems to be two “Marianas” linked to this devotion, so some more research is indicated. Some sites say she has been canonized, so it should not be hard to determine. With just a brief review of the first few links that pop up, it seems the reason for renewed interest is that supposedly her prophesies allege dire events including heresy taught by those within the Church for the 20th century.