Paris Hilton suffered a case of deja vu all over again when a pack of chicks snuck into her casa and tried to steal her stuff -- but rather than make off with millions like the "bling ring" ... these crooks failed miserably.
Sources tell TMZ ... the attempted snatch job went down when Paris threw herself a going away party at her Malibu beach house last weekend -- the send-off before she jetted to Ibiza.
We're told a group of random girls crashed the party, snuck into P's bedroom, and tried to jack bikinis, Paris Hilton handbags and framed pics. Not exactly primo swag.
Problem is ... we're told the banditos got spooked when someone spotted them, and while making their getaway ... they dropped all the loot.
A valet found the goods down the road from Paris' house and turned it all over to cops.
Paris' driver picked up the stuff. No police report was filed.