1387
Two months after this campaign , towards the end of March , FireEye says it detected the zero - day again , but this time used by a group of cyber-criminals spreading LatentBot , a sophisticated backdoor trojan , usually found in enterprise environments and used for economic espionage campaigns .
 the zero - day: vulnerability; FireEye: discoverer
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: discover vulnerability 
  Option: vulnerable system owner, vulnerability, capabilities, time, vulnerable system version, discoverer, common vulnerabilities and exposures, supported platform, vulnerable system 
Text: {0} 
Answer:
 the zero - day: vulnerability; FireEye: discoverer