Network security appliances tested. Over the last few months we have seen a surge in attacks using apparently innocent documents that install malware covertly on victims’ systems.
Unless you are running specialist monitoring tools, or very effective security software, you probably won’t see any symptoms of the attack.
The goals of these attacks are varied. In some cases they provide remote access to hackers. In others so-called cryptocurrency mining software is installed. These programs (ab)use your systems’ processing power in an attempt to generate cryptocurrencies such as Monero. The attackers get rich off your power bill.
While there are variations in how the attacks work, the typical path to compromise involves opening the document, which could be in Microsoft Word format, after which an exploit runs a PowerShell script. This, in turn, downloads and installs the malware.
Network security appliances
In this report we investigate how effectively some very popular network security products are at handling these and other threats.
As usual, we have also thrown in some particularly devious targeted attacks that appear to be completely legitimate applications but that provide us with remote access to unprotected targets. When we gain this access we try to hack the target in the same way a real attacker would. This gives the security products the best chance of detecting and potentially blocking the bad behaviour.
The good news is that all of these products were able to detect many (if not all) of the threats. Some were able to block most, although complete protection is not guaranteed. As always, a layered approach to protection is best. For advice on which endpoint software to choose see our Endpoint Protection test results on our website.
Criminals routinely create ingenious scams and indiscriminate attacks designed to compromise the unlucky and, occasionally, foolish. But sometimes they focus on a specific target rather than casting a net wide in the hope of landing something interesting.
Targeted attacks can range from basic, like an email simply asking you to send some money to an account, through to extremely devious and technical. If you received an email from your accountant with an attached PDF or Excel spreadsheet would you open it?
Most would and all that then stands between them and a successful hack (because the email was a trick and contained a dodgy document that gives remote control to the attacker) is the security software running on their PC. How good is your anti-malware protection?
Anti-malware protection from different threats
In this test we’ve included indiscriminate, public attacks that come at victims from the web and via email, but we’ve also included some devious targeted attacks to see how well-protected potential victims would be.
We’ve not created any new types of threat and we’ve not discovered and used ‘zero day’ attacks. Instead we took tools that are freely distributed online and are well-known to penetration testers and criminals alike. We used these to generate threats that are realistic representations of what someone could quite easily put together to attack you or your business.
The results are extremely worrying. While a few products were excellent at detecting and protecting against these threats many more were less useful. We will continue this work and report any progress that these companies make in improving their products.
See if your anti-malware protection is up to scratch!
Our latest reports, for enterprise, small business and home users are now available for free from our website. Please download them and follow us on Twitter and/or Facebook to receive updates and future reports. Our blog is always here with extra help.
Are cyber-scammers creating their own fake news stories to exploit? Jon Thompson investigates cybercrime mis-reporting.
The UK media recently exploded with news of a new phone-based scam. Apparently, all that’s needed for fraudsters to drain your bank account is a recording of you saying “yes”. It runs as follows:
No one publishes successful phishing and ransomware emails. Jon Thompson thinks he knows why spammers fail so often.
Running an email honeypot network, you receive a flood of malicious email every day. Most is littered with glaring errors that point to lazy, inarticulate crooks trying to make the quickest buck from the least effort. When you do come across a rare, well though-out campaign, it shines like a jewel in a sea of criminal mediocrity.
To the average spammer, however, it’s all just a numbers game. He cranks the handle on the botnet, so to speak, and money comes out.
This poses an important question: why, given the quality of most malicious spam, are new ransomware infections and high profile phishing attacks still making headlines almost every single day? Clearly, we’re massively overestimating the amount of effort and intelligence invested by spammers.
With that in mind, what follows is a short list of 17 mistakes I routinely see spammers make. All of them immediately guarantee that an email is malicious. There are others, but these are the main ones. If this list reflects the mistakes found in the spam behind the headlines, then the size yet lack of sophistication of the problem should become apparent.
1. No Subject Header
This error is particularly prevalent in ransomware campaigns. Messages whose payloads have very low VirusTotal scores are being sent with no subject header. Maybe the sender thinks it’ll pique the curiosity of the recipient, but it should also alert spam filters even before they examine the attachment.
2. No Set Dressing
Look at any real communication from a bank, PayPal, a store, etc. It is well formatted, the HTML is clean, the language is clear, and the branding is obvious. Legitimate companies and banks don’t tend to send important messages in plain text.
3. Generic Companies
Generic companies are rare but I do occasionally see them. Who is “the other financial institution” and why has it refused my transaction? Vague, instantiated company names like this, with an accompanying attachment, are clear indicators of spam.
4. Multiple Recipients
This is another example of laziness on the part of spammers. OK, they may have found an open relay to willingly spread messages rather than buy extra time on a botnet, but anything other than a one-to-one sender to recipient ratio should be an instant red flag.
5. Poor Salutation
Much apparently personalised spam doesn’t use a competent salutation, or uses a salutation that is simply the user name part of the email address (i.e.: “Dear fred.smith”). It would take effort to code a script that personalises the messages by stripping off the first name and capitalising the initial. Effort is the enemy of the fast buck.
6. No Body Text
Sending an email with a tantalizing subject header such as “Overdue – Please Respond!” but no body text explaining what or why it’s overdue is as common in commodity ransomware as having no subject header. The attack again relies entirely on the natural curiosity of the recipient, who can and should simply ignore it. Spam filters should also take a keen interest.
7. Auto-translated Body Text
Machine translation has the amusing habit of mapping the grammar of one language onto another, resulting in errors that no native speaker would ever make. Manual translation by a highly fluent speaker is far superior to machine translation, but the translator must also have knowledge of the subject matter for his text to appear convincing. Again, this is effort.
8. The Third Person
This is a great example of a spammer trying to distance himself from his crime. “PayPal has detected an anomaly in your account” and “they require you to log in to verify your account” just look weird in the context of a security challenge. This is supposed to be from PayPal, isn’t it?
9. Finger Trouble
I’m fast concluding that some cybercriminals really do wear thick leather gloves while typing, just like in the pictures. Either that or they’re blind drunk. Random punctuation marks and extra characters that look like they’ve been hit at the same time as the correct ones don’t make a good impression. Simply rejecting emails that have more than a certain percentage of spelling mistakes might prevent many of these messages from getting through.
10. Unexpected Plurals and Tenses
Using “informations” instead of “information” is a dead giveaway for spam and should be blocked when in combination with other indicators. Phrases such as “we detect a problem” instead of “we detected a problem” also stick out a mile as being from spammers.
11. Missing Definite Article
Many spam emails stand out as somehow “wrong” because they miss out the definite article. One recent example I saw read: “Access is blocked because we detect credit card linked to your PayPal account has expired.” An associated Yandex.ru return address gave the whole thing a distinct whiff of vodka.
12. The Wrong Word
“Please review the document and revert back to us immediately”. Revert? Really? Surely, you mean “get back”, not “revert back”. It may be difficult for spam filters to weed out this kind of error, but humans should spot it without difficulty.
13. Misplaced Emphasis
Unusually capitalised phrases such as “You must update Your details to prevent Your Account from being Suspended” look weird. Initial capitalisation isn’t used for emphasis in English sentences, and hints at someone trying to make the message sound more official and urgent than it is.
14. Tautological Terrors
“It is extremely mandatory that you respond immediately”. Not just mandatory but extremely mandatory? Wow, I’d better click that link right away! Urgent calls to action like this overplay the importance of the message in ways that mark them out as fake.
15. Grandiosity
Using grand words where normal ones should appear to make a message sound more authoritative are a dead giveaway. Here’s an example from last September when a gang famously tried to distribute malware on the back of a new media player release: “To solemnise the release of our new software”. Solemnise means to mark with a formal ceremony.
What they really meant was: “To mark the release of our new software”. The whole message was also riddled with the most outrageous auto-translate errors that it made difficult reading.
16. Overly-grand Titles
Why would the Microsoft Chief Support Manager be contacting me personally all the way from the US to give me a refund? Wouldn’t he delegate this important work to a local minion? Similarly, the head of the IMF doesn’t usually spend their days emailing strangers about ATM cards stacked high with cash. Spammers would, though.
17. Obfuscated URLs
If the collar doesn’t match the cuffs, it’s a lie. In other words, if the message contains the name of a high-street bank (for example) and a URL from a shortening service such as bit.ly, spam filters should be blocking the message without question, regardless of the rest of the content.
Pundits pontificating about online fraud is all well and good, but what do the banks think, and how do they protect us?
To find the truth, we talked candidly to a branch manager from UK bank NatWest.
SE: First of all, what’s the scale of the online fraud problem from the bank’s perspective?
I won’t lie. It’s massive. We’re always being told about phishing emails, and you can report them to us online. Scam phone calls pretending to be the bank and asking for your account details and passwords are also huge. Just to be sure, we never ask for passwords. No one does Well, no one legitimate anyway.
SE: If you’re scammed can you get your money back?
It all depends. The basic thing is if it’s not a transaction you’ve made, its fraud and we can help. If it’s something you’ve done yourself that’s it, the money’s gone. Where it gets tricky is when you think you’re signing up to a one-off payment but the small print says it’s every month and you don’t realise. It might be cleverly worded, but it’s up to you to read what it is you’re buying. If there’s any doubt, don’t do it or bring it in for us to check.
SE: How do you protect people’s money in general?
The monitoring systems now are really good. They put blocks on cards when something suspicious happens, and block dodgy transactions while we find out if they’re legitimate. Tell us you’re going to France for the week and we’ll know not to block your cards if we see a cash withdrawal from Paris. If you tell us you usually go to France about now then we can keep the card active for you. It’s just when we see things out of the ordinary that the system will react. A lot of the time people get their cards blocked on holiday because they forgot to tell us. It’s a pain for them, but if you tell us what you’re doing it’s usually fine.
We see a lot of “Make $2000 a month from home”-style spam. What’s the scam there?
It’s usually money laundering. A foreign gang wants your bank details to put money into your account, then you send it on to someone either at home or abroad but keep an agreed percentage as commission. It’s an old one, that. Sometimes, they want you to physically receive and send on stolen bank cards as well, or ones that have been obtained fraudulently. But you’re being used. Basically, if you’re caught acting as a money mule, then you’re as guilty as the bloke who gave you the money to carry. We have a legal obligation to report anything over a certain amount transferred from abroad into people’s accounts. Again, it’s one of the things the system looks for that’s out of the ordinary.
Can the banks stop people being duped into sending money to scammers abroad?
You mean like rich Nigerian princes and lottery wins that need a processing fee? At the end of the day, it’s their money. We can only advise. We can say: look, we think this looks like a scam. But if they want to send it abroad then we have to do it for them. If it’s a large amount, we’ll ask them in to sit down and think is this really what they want. [We try to] find out how well they understand what they’re doing and where they’re sending it. We have had cases where people have lost considerable amounts because they’re convinced the online fraud is real.
What’s the most outrageous thing you’ve seen?
I was asked to look at the cash machine outside the branch I was managing once, and there was a piece of wire hanging out of the card slot. That’s all it was. But it prevented the card from being returned, so people walk off thinking the machine’s swallowed it. You pull on the wire and the card pops out. It’s called a Lebanese Loop. Simple and easy. Once you’ve got the card you’ve got the expiry date and the CVV number on the back and you can go shopping.
What’s your personal message to customers?
Basically, it’s always a scam. If it looks like something where you think you can get one over on the sender, it’s still a scam. These people aren’t stupid. No one wants to give you free money. You haven’t won a foreign lottery, either. There’s no pot of gold. They may only want a small processing fee, but if they get a lot of fees, it’s very profitable for them. Start with the idea that everything’s a scam, ask us to confirm anything you get that you don’t understand and you’ll be alright.
What other guidance is there for people?
There’s lots about but it’s a bit scattered. Barclays did a good TV advert about phone scams. We’ve published a really comprehensive leaflet about online scams in conjunction with the police that covers all the different frauds. You can download that, and we have a web site for reporting scams. But if you have any questions the best thing is to just call the bank or walk into a branch and ask. That’s the best thing to tackle online fraud.
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