[threat-actors] Add APT23 aliases

clusters/threat-actor.json

@@ -1615,7 +1615,8 @@
           "https://attack.mitre.org/groups/G0081/",
           "https://www.secureworks.com/research/threat-profiles/bronze-hobart",
           "https://www.mandiant.com/resources/insights/apt-groups",
-          "https://www.pwc.co.uk/cyber-security/pdf/pwc-cyber-threats-2020-a-year-in-retrospect.pdf"
+          "https://www.pwc.co.uk/cyber-security/pdf/pwc-cyber-threats-2020-a-year-in-retrospect.pdf",
+          "https://www.trendmicro.com/en_us/research/21/l/collecting-in-the-dark-tropic-trooper-targets-transportation-and-government-organizations.html"
         ],
         "synonyms": [
           "PIRATE PANDA",
@@ -1623,7 +1624,8 @@
           "Tropic Trooper",
           "BRONZE HOBART",
           "G0081",
-          "Red Orthrus"
+          "Red Orthrus",
+          "Earth Centaur"
         ],
         "targeted-sector": [
           "Military",