Related: https://medium.com/@entdark_/decrypting-ransomwares-internal-strings-2f3b6b8d8ee0#.jxzfwbykd

decryption_class.java

import java.security.NoSuchAlgorithmException;
import javax.crypto.Cipher;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class decryption_class {
    private Cipher cipher;
    protected String iv;
    private IvParameterSpec ivParameterSpec;
    protected String key;
    byte[] newArray;
    private SecretKeySpec secretKeySpec;
    byte[] string;

    public decryption_class() {
        this.iv = "DhnbRhHfUXKeFEUX";
        this.newArray = null;
        this.key = "o5dke7ZqYhZzRcvA";
        getIV();
        this.secretKeySpec = new SecretKeySpec(this.key.getBytes(), "AES");
        try {
            this.cipher = Cipher.getInstance("AES/CBC/NoPadding");
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e2) {
            e2.printStackTrace();
        }
    }

    private void getIV() {
        this.ivParameterSpec = new IvParameterSpec(this.iv.getBytes());
    }

    private static byte[] getBuffer(String code) {
        int len = code.length() / 2;
        byte[] buffer = new byte[len];
        for (int i = 0; i < len; i++) {
            int tmp = i * 2;
            buffer[i] = (byte) Integer.parseInt(code.substring(tmp, tmp + 2), 16);
        }
        return buffer;
    }

    public String setProperty(String code) {
        try {
            this.cipher.init(2, this.secretKeySpec, this.ivParameterSpec);
            if (code == null || code.length() < 2) {
                return null;
            }
            this.string = this.cipher.doFinal(getBuffer(code));
            if (this.string.length > 0) {
                int trim = 0;
                for (int i = this.string.length - 1; i >= 0; i--) {
                    if (this.string[i] == 0) {
                        trim++;
                    }
                }
                if (trim > 0) {
                    this.newArray = new byte[(this.string.length - trim)];
                    this.newArray = scope(this.string, this.newArray, trim);
                    this.string = this.newArray;
                }
            }
            return new String(this.string);
        } catch (Exception e) {
        }
        return "ERROR";
    }

    private static byte[] scope(byte[] src, byte[] dst, int trim) {
        int length = src.length - trim;
        for (int i = 0; i < length; i++) {
            dst[i] = src[i];
        }
        return dst;
    }
    public static void main(String [] args) {
        decryption_class t = new decryption_class();
        System.out.println(t.setProperty(args[0]));
    }
}