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I hacked my friend’s website after a SIM swap attack

May 27, 2021

Right here’s how simply your telephone quantity might be stolen, why a profitable SIM swap rip-off is barely the start of your issues, and how one can keep away from changing into a sufferer of the assault

Simply how straightforward is it to conduct a SIM swap attack and what can the attacker do as soon as they’ve taken management of your telephone quantity? Briefly, it’s worryingly straightforward and the criminals can do loads as soon as they’ve the keys to the dominion.

We hear of SIM swapping – also called SIM hijacking and SIM swap scams – on a regular basis, and but many individuals suppose it could actually’t ever occur to them. Certainly, individuals usually inform me that they are going to by no means get hacked in any means and so they really even marvel why anybody would even goal them. However the fact is that we’re a part of an enormous numbers recreation for a lot of malicious actors and they’ll proceed to focus on the low-hanging fruit. So why don’t we simply implement a couple of precautionary strategies to cut back this threat?

I’ll come again to what you are able to do to mitigate the dangers later, however first I need to let you know how I examined a SIM swap assault simply so I may generate a chat and assist individuals perceive the dangers. An actual-life story is at all times higher when serving to individuals to be extra cyber-aware. Actually, I ran the same experiment final 12 months once I confirmed how straightforward it’s to hack anyone’s WhatsApp account by realizing their telephone quantity. It was a really beneficial lesson for the colleague-turned-victim.

I’ve identified my pal – a let’s name him Paul – since faculty and we’ve been shut buddies ever since. I requested him just lately if I may try and ethically hack him for the better good and use something that got here from it within the identify of cyber-awareness and serving to shield individuals from future assaults. He was blissful to oblige and even thought it might be enjoyable to be a part of an experiment.

How SIM swapping works

All I wanted to conduct the take a look at was Paul’s actual identify and telephone quantity. Paul owns an actual property company that sells luxurious properties in probably the most costly places within the UK. Very like for a lot of different individuals, his contact particulars might be discovered on his web site, plus with some good old school web analysis (or open-source intelligence, aka OSINT) I used to be capable of finding a complete lot extra.

Performing like a real menace actor, I recorded any details about him that I may discover on-line, as a 3rd occasion would, with out submitting any pal requests or follows on his social media. Though some unhealthy actors may, in actual fact, request a reference to their targets, I believed this experiment could be finest if I stored my distance, as I do in actual fact know loads about him.

It didn’t take lengthy to search out out an incredible quantity of details about him, particularly by his public Instagram feed and wide-open Fb posts. I used to be eager to find dates and numbers that meant one thing to him, so I dug round for birthdays and anything that appeared of chronological curiosity. I quickly discovered the delivery dates each for Paul and his son – I solely wanted to have a look at a number of public posts he made throughout his social networks earlier than, throughout and after their birthdays. It didn’t take a genius to work out the precise days on which they every had been born, so I famous these dates of curiosity and moved on to the following a part of the experiment.

Most individuals within the UK use considered one of a small variety of telecommunication corporations, so I made a decision to begin with one. Bingo. I obtained fortunate with the primary firm, because it was the one he was with. After going by the system and getting maintain of the very useful agent, I mentioned I used to be Paul and gave his corresponding telephone quantity to which I then needed to move safety. The safety for many of those telecommunication corporations is to show who you’re by giving two digits from a beforehand agreed PIN code. There will likely be heaps of people that memorize their bank card PIN numbers or the code to unlock their telephone, however that is largely because of muscle reminiscence and the necessity to actively use these codes.

Nevertheless, I might doubt many individuals log into their telephone supplier’s account usually sufficient to have memorized this code. Subsequently, individuals fall into entice 1: utilizing a PIN that’s related and simply memorable to themselves, similar to a delivery date.

Which is precisely what got here in helpful for my experiment. I don’t know what number of cracks on the proper digits you get, however it’s actually a couple of. Suffice to say, then, that as a part of the verification course of I first submitted ‘1’ and ‘1’ (Paul’s son was born in 2011). It was mistaken, however the useful agent gave me one other go. This time I went for ‘8’ and ‘2’ (Paul was born in 1982), to which her reply was that I handed safety and was requested to explain my downside in better element.

I gave a distressed detailed account of how my telephone had been stolen, that it was important that the SIM card was stopped and that I had bought a brand new SIM card and due to this fact wanted it ported throughout. I had a brand new SIM card in my hand prepared to position right into a spare telephone. I gave the agent the brand new SIM quantity and she or he mentioned that my quantity could be ported inside a couple of hours.

At this stage, all Paul would have observed is that his community sign would have dropped out and no textual content messages would have landed on his telephone. He would nonetheless have been capable of entry the web ought to he have been on Wi-Fi, which he really was, as he was within the workplace once I known as his cellular supplier.

Inside two hours after turning my spare telephone on and off a number of instances, I used to be granted full entry to Paul’s quantity. I examined it by ringing my telephone from my spare telephone and true to the phrase of the agent, this new SIM in my spare telephone was now appearing as Paul, as his identify appeared on my telephone when it rang. That is the place the hazard actually can begin.

The results of the assault

I knew it was solely a matter of time earlier than Paul would determine one thing was up, so I went to his web site and famous the host, which was a well-liked web site builder. I used to be in a position to make use of his e mail tackle in opposition to the “forgotten password” hyperlink (a hacker’s favourite button) to submit my request and see what would occur.

As he’s reasonably conscious of cyberattacks, he had two-factor authentication (2FA) set up however to my pleasure, solely by way of SMS – entice 2. I clicked by the suitable pages and inside seconds I had a code despatched by way of SMS to my spare telephone. I entered this again on the web site and hey presto, I used to be given the chance to vary his password.

I may have doubtlessly continued finishing comparable actions on his social media and web-based e mail too, however I believed I had made my level and determined to retract. Whereas I used to be there although, I did suppose it might be enjoyable to position an enormous smiling mugshot of myself on his entrance web page which made for an attention-grabbing chat once I rang him on his landline to inform him his up to date web site was trying nice presently. For sure, he was gobsmacked with what he noticed, however was extra impressed at how rapidly I had taken management of his most dear asset.

How one can shield your self from SIM swap fraud

Anybody studying this may now hopefully be questioning how they’ll shield their accounts. There are two essential methods to thwart SIM swap assaults:

  • By no means use something linked to you in your PIN codes or passwords.
  • The place attainable, substitute SMS-based 2FA with an authenticator app or bodily safety key.

This could have stopped me from getting access to Paul’s cell phone account, however extra importantly, it might have stopped me from altering his passwords. As soon as these are stolen, felony hackers can simply block the real account holders out of their accounts and it may be extraordinarily troublesome and even not possible to regain management over them. The results may be notably dire in your financial institution, e mail and social media accounts.

As for Paul, I gave him entry again to his SIM and web site, helped him arrange an authenticator app and he modified his cell phone supplier’s PIN code. I additionally helped him bear in mind this code by means of instructing him the ways of a password manager. Simply as importantly, I suggested him to stop sharing sensitive personal information on social media and to restrict the quantity of people that can see his posts or different materials there.

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