July 19 (Reuters) - Coventry Group Ltd CYG.AX
* It is anticipated that a decrease in rental income in order of $1 million is likely in 2018
* Has been unable to determine exact financial impact of cyber attack incident on group
* Says group was subject to a cyber-attack in May when ransomware was inadvertently executed within its it networks
* It is likely that material sales were lost during cyber attack as ability to take customer orders was compromised
* Expects that a material non-cash increase in current inventory provisioning will be included in FY17 results