1726
The group behind the attacks , named APT10 , was found to have used custom malware and " spear phishing " techniques to target managed outsourced IT service companies as stepping stones into the systems of an " unprecedented web " of victims according to the report 's authors .
 custom malware: tool; outsourced IT service companies: victim; APT10: attacker
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: phishing 
  Option: victim, attacker, attack pattern, purpose, damage amount, tool, time, place, trusted entity 
Text: {0} 
Answer:
 custom malware: tool; outsourced IT service companies: victim; APT10: attacker