get_RSA.java

 import java.io.File;
 import java.util.Base64;
 import common.CommonUtils;
 import java.security.KeyPair;
 
 class get_RSA
 {   
     public static void main(String[] args)
     {
         try {
             File file = new File(".cobaltstrike.beacon_keys");
             if (file.exists()) {
                 KeyPair keyPair = (KeyPair)CommonUtils.readObject(file, null);
                 System.out.printf("Private Key: %s\n\n", new String(Base64.getEncoder().encode(keyPair.getPrivate().getEncoded())));
                 System.out.printf("Public Key: %s\n\n", new String(Base64.getEncoder().encode(keyPair.getPublic().getEncoded())));
             }
             else {
                 System.out.println("Could not find .cobaltstrike.beacon_keys file");
             }
         }
         catch (Exception exception) {
            System.out.println("Could not read asymmetric keys");
         }
     }
 }