NEW YORK – The latest federal lawsuit over alleged mortgage fraud paints an unflattering picture of a doomed lender: Executives at Countrywide Financial urged workers to churn out loans, accepted fudged applications and tried to hide ballooning defaults.

The suit, filed Wednesday by the top federal prosecutor in Manhattan, also underscored how Bank of America’s purchase of Countrywide in July 2008, just before the financial crisis, backfired severely.

The prosecutor, Preet Bharara, said he was seeking more than $1 billion, but the suit could ultimately recover much more in damages.