1583
F5 experts say that in the beginning , attackers targeted Struts instances running on Linux servers , where they would end up installing the PowerBot malware , an IRC - controlled DDoS bot also known as PerlBot or Shellbot .
 F5 experts: discoverer; Struts: vulnerable system; Linux servers: supported platform
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:
 F5 experts: discoverer; Struts: vulnerable system; Linux servers: supported platform