This indicates an attack attempt against an Information Disclosure vulnerability in ManageEngine Eventlog Analyzer.
The vulnerability is due to insufficient validation of user supplied data when handling crafted HTTP Requests. A remote attacker can exploit this to disclose sensitive information from affected machines using malicious packets.
ManageEngine EventLog Analyzer 9.9 build 9002 and prior
Information Disclosure: Remote attackers can gain sensitive information from vulnerable systems
Currently we are unaware of any vendor supplied patch for this issue