Apparently, real estate companies rely primarily on MLS databases, so that varied brokers could exchange information. This data enables cooperating brokers to promote each other's properties and power listing websites.

Rapattoni’s Twitter post published on Sunday said that the attack on August 8 "caused a system outage and we are working diligently to get systems restored as soon as possible[…]We still do not have an ETA at this time."

While the company did not yet make it clear if its systems were hit by ransomware, Rapattoni’s production system remained offline on Tuesday.

Rapattoni's services are used by numerous regional MLS providers to manage commissions for listing agents and the agent who secure sales, along with finding new properties that are going on the market, updating home listings, and connecting buyers and sellers to enable offers and keeping track of purchase specifics.

Many regional MLS providers have resorted to manual procedures as the attack interfered with their ability to do that automatically.

According to local ABC affiliate WCPO, Cincy MLS, which supports 7,500 real estate agents in Cincinnati but is no longer available due to the attack on Rapattoni, established a Facebook page where agents can manually share property information. Besides Rapattoni, the attack had impacts on other house listing companies, Zillow being one of them. Zillow was later forced to input its data manually. 

Sonoma-based broker Gerrett Snedaker told California's North Bay Business Journal that real estate agents may face financial issues in the wake of the attacks since they would not be able to list properties for a few days.  

However, data sharing amongst an alliance of seven MLS companies in Northern California, which synchronize data every 15 minutes, has helped to significantly lessen the impact of Rapattoni's outage in the area, the company reported.

After being warned of the attack, alliance member MetroList Services in Sacramento was able to disconnect its data centre from Rapattoni and has since given BAREIS and San Francisco access to archived listings, according to North Bay Business Journal. BAREIS and San Francisco MLS entities too were affected by the Rapattoni outage.