2008
In short , there has been an active infection for the last four years of an adversary attempting to compromise industrial environments by theming their malware to look like Siemens control software .
 ( phishing: look like,  malware: tool, control software: trusted entity, Siemens: trusted entity) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( phishing: look like,  malware: tool, control software: trusted entity, Siemens: trusted entity) 