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In large metropolitan areas, tourists are often easy to spot because they’re far more inclined than locals to gaze upward at the surrounding skyscrapers. Security experts say this same tourist dynamic is a dead giveaway in virtually all computer intrusions that lead to devastating attacks like data theft and ransomware, and that more organizations should set simple virtual tripwires that sound the alarm when authorized users and devices are spotted exhibiting this behavior.
In a blog post published last month, Cisco Talos said it was seeing a worrisome “increase in the rate of high-sophistication attacks on network infrastructure.” Cisco’s warning comes amid a flurry of successful data ransom and state-sponsored cyber espionage attacks targeting some of the most well-defended networks on the planet.
But despite their increasing complexity, a great many initial intrusions that lead to data theft could be nipped in the bud if more organizations started looking for the telltale signs of newly-arrived cybercriminals behaving like network tourists, Cisco says.
“One of the most important things to talk about here is that in each of the cases we’ve seen, the threat actors are taking the type of ‘first steps’ that someone who wants to understand (and control) your environment would take,” Cisco’s Hazel Burton wrote. “Examples we have observed include threat actors performing a ‘show config,’ ‘show interface,’ ‘show route,’ ‘show arp table’ and a ‘show CDP neighbor.’ All these actions give the attackers a picture of a router’s perspective of the network, and an understanding of what foothold they have.”
Cisco’s alert concerned espionage attacks from China and Russia that abused vulnerabilities in aging, end-of-life network routers. But at a very important level, it doesn’t matter how or why the attackers got that initial foothold on your network.
It might be zero-day vulnerabilities in your network firewall or file-transfer appliance. Your more immediate and primary concern has to be: How quickly can you detect and detach that initial foothold?
The same tourist behavior that Cisco described attackers exhibiting vis-a-vis older routers is also incredibly common early on in ransomware and data ransom attacks — which often unfurl in secret over days or weeks as attackers methodically identify and compromise a victim’s key network assets.
These virtual hostage situations usually begin with the intruders purchasing access to the target’s network from dark web brokers who resell access to stolen credentials and compromised computers. As a result, when those stolen resources first get used by would-be data thieves, almost invariably the attackers will run a series of basic commands asking the local system to confirm exactly who and where they are on the victim’s network.
This fundamental reality about modern cyberattacks — that cybercriminals almost always orient themselves by “looking up” who and where they are upon entering a foreign network for the first time — forms the business model of an innovative security company called Thinkst, which gives away easy-to-use tripwires or “canaries” that can fire off an alert whenever all sorts of suspicious activity is witnessed.
“Many people have pointed out that there are a handful of commands that are overwhelmingly run by attackers on compromised hosts (and seldom ever by regular users/usage),” the Thinkst website explains. “Reliably alerting when a user on your code-sign server runs whoami.exe can mean the difference between catching a compromise in week-1 (before the attackers dig in) and learning about the attack on CNN.”
These canaries — or “canary tokens” — are meant to be embedded inside regular files, acting much like a web beacon or web bug that tracks when someone opens an email.
The Canary Tokens website from Thinkst Canary lists nearly two-dozen free customizable canaries.
“Imagine doing that, but for file reads, database queries, process executions or patterns in log files,” the Canary Tokens documentation explains. “Canarytokens does all this and more, letting you implant traps in your production systems rather than setting up separate honeypots.”
Thinkst operates alongside a burgeoning industry offering so-called “deception” or “honeypot” services — those designed to confuse, disrupt and entangle network intruders. But in an interview with KrebsOnSecurity, Thinkst founder and CEO Haroon Meer said most deception techniques involve some degree of hubris.
“Meaning, you’ll have deception teams in your network playing spy versus spy with people trying to break in, and it becomes this whole counterintelligence thing,” Meer said. “Nobody really has time for that. Instead, we are saying literally the opposite: That you’ve probably got all these [security improvement] projects that are going to take forever. But while you’re doing all that, just drop these 10 canaries, because everything else is going to take a long time to do.”
The idea here is to lay traps in sensitive areas of your network or web applications where few authorized users should ever trod. Importantly, the canary tokens themselves are useless to an attacker. For example, that AWS canary token sure looks like the digital keys to your cloud, but the token itself offers no access. It’s just a lure for the bad guys, and you get an alert when and if it is ever touched.
One nice thing about canary tokens is that Thinkst gives them away for free. Head over to canarytokens.org, and choose from a drop-down menu of available tokens, including:
-a web bug / URL token, designed to alert when a particular URL is visited;
-a DNS token, which alerts when a hostname is requested;
-an AWS token, which alerts when a specific Amazon Web Services key is used;
-a “custom exe” token, to alert when a specific Windows executable file or DLL is run;
-a “sensitive command” token, to alert when a suspicious Windows command is run.
-a Microsoft Excel/Word token, which alerts when a specific Excel or Word file is accessed.
Much like a “wet paint” sign often encourages people to touch a freshly painted surface anyway, attackers often can’t help themselves when they enter a foreign network and stumble upon what appear to be key digital assets, Meer says.
“If an attacker lands on your server and finds a key to your cloud environment, it’s really hard for them not to try it once,” Meer said. “Also, when these sorts of actors do land in a network, they have to orient themselves, and while doing that they are going to trip canaries.”
Meer says canary tokens are as likely to trip up attackers as they are “red teams,” security experts hired or employed by companies seeking to continuously probe their own computer systems and networks for security weaknesses.
“The concept and use of canary tokens has made me very hesitant to use credentials gained during an engagement, versus finding alternative means to an end goal,” wrote Shubham Shah, a penetration tester and co-founder of the security firm Assetnote. “If the aim is to increase the time taken for attackers, canary tokens work well.”
Thinkst makes money by selling Canary Tools, which are honeypots that emulate full blown systems like Windows servers or IBM mainframes. They deploy in minutes and include a personalized, private Canarytoken server.
“If you’ve got a sophisticated defense team, you can start putting these things in really interesting places,” Meer said. “Everyone says their stuff is simple, but we obsess over it. It’s really got to be so simple that people can’t mess it up. And if it works, it’s the best bang for your security buck you’re going to get.”
Further reading:
Dark Reading: Credential Canaries Create Minefield for Attackers
NCC Group: Extending a Thinkst Canary to Become an Interactive Honeypot
Cruise Automation’s experience deploying canary tokens
Something you’ll want to know about all those movies, mp3s, eBooks, air miles, and hotel points you’ve accrued over the years: they’re digital assets that can factor into a divorce settlement.
Understandably, several factors determine the distribution of assets in a divorce. However, when it comes to dividing digital assets, divorce settlements and proceedings are charting new territory. The rate of digital innovation and adoption in recent years has filled our phones, tablets, and computers with all manner of digital assets. What’s more, there are also the funds sitting in our payment apps or possibly further monies kept in the form of cryptocurrencies like bitcoin. Put plainly, the law is catching up with regards to the distribution of these and other digital assets like them.
Yet one thing that the law recognizes is that digital assets can have value and thus can be considered property subject to distribution in a divorce.
In light of this, the following is a checklist of considerations that can help prepare you or someone you know for the distribution of digital assets in a fair and just way.
Nothing offered in this article is legal advice, nor should it be construed as such. For legal advice, you can and should turn to your legal professional for counsel on the best approach for you and the laws in your area.
For starters, let’s get an understanding as to what actually constitutes a digital asset.
Because laws regarding digital assets vary (and continue to evolve), the best answer you can get to this question will come from your legal counsel. However, for purposes of discussion, a digital asset is any text or media in digital form that has value and offers the bearer the right to use it.
To put that in practical terms, let’s look at some real-world examples of what could constitute a digital asset. That list includes, but is not limited to:
However, digital assets can readily expand to further include:
And like any other asset in the case of a divorce, a value will be ascribed to each digital asset and then distributed per the conditions or orders of the settlement.
Arriving at the value of specific digital assets begins with an inventory—listing all the digital assets and accounts you own, just as you would with any other monetary or physical assets like bank accounts, properties, and cars. When you go through this process, chances are you’ll quickly find that you have hundreds if not thousands of dollars of digital assets.
For example, we can look at the research we conducted in 2011 which found that people placed an average value of $37,438 on the digital assets they owned at the time. Now, with the growth of streaming services, digital currency, cloud storage, and more in the past ten years, that figure feels conservative.
Above and beyond preparing for a divorce settlement, taking such an inventory of your digital assets is a wise move. One, it provides you with a clearer vision of the things you own and their worth; two, maintaining such a list gives you a basis for estate planning and determining who you would like to see receive those assets. Likewise, maintain that list on a regular basis and keep it safe. It’s good digital hygiene to do so.
With this inventory, each asset can then have an assessed value ascribed to it. In some instances, a value will easily present itself, such as the cost of a subscription or how much money is sitting in a PayPal account. In other cases, the value will be sentimental, such as the case is with digital photos and videos. Ideally, you and your spouse will simply be able to duplicate and share those photos and videos amicably, yet it is important that you articulate any such agreement to do so. This way, a settlement can call out what is to be shared, how it will be shared, and when.
Not all digital assets are transferrable. Certain digital assets are owned solely in your name. In other words, you may have access to certain digital assets that cannot transfer to someone else because you do not have the rights to do so per your user agreement. This can be the case with things such as digital books, digital music, and digital shows and movies.
In such circumstances, there may be grounds for negotiation and a “limited transfer” in the settlement, where one party exchanges one asset for another rather than splitting it equally. A case in point might be a sizeable eBook library on a device that’s in the name of one spouse. While that library can’t be split or transferred, one spouse may keep the eBook library while another spouse keeps a similarly valued asset or group of assets in return—like say a collection of physical books.
Streaming services will need to be addressed too. Be prepared to either terminate your accounts or simply have them assigned to the person in whose name they are kept. In the case of family accounts, the settlement should determine how that is handled, whether it gets terminated or similarly turned over to one spouse or the other. In all, your settlement will want to specify who takes over what streaming service and when that must occur.
Like dividing up investment accounts where the value of the account can vary daily, digital currencies can present challenges when spouses look to divide the holdings. Cryptocurrency valuation can be quite volatile, thus it can be a challenging asset to settle from a strict dollar standpoint.
What’s more, given the nature of digital currencies, there are instances where an unscrupulous spouse may seek to hide worth in such currency—which is an evolving issue in of itself. This recent article, “Cryptocurrency: What to Know Before and During Divorce,” covers the additional challenges of cryptocurrency in detail, along with an excellent primer on what cryptocurrency is and how it works.
Ultimately, cryptocurrency is indeed an asset, one that your attorney and settlement process will need to address, specifically so that there are no complications later with the transfer or valuation of the awarded currency.
With accounts changing hands, now’s the time to start fresh with a new set of passwords. What’s more, we have a tendency to reuse the same passwords over and over again, which may be known to an ex-spouse and is an inherent security risk in of itself. Change them. Even better, take this opportunity to use a password manager. A password manager can create and securely store strong, unique passwords for you, thus saving you the headache of maintaining dozens of them yourself—not to mention making you far more secure than before.
Again, keep in mind that nothing here is legal advice. Yet, do keep these things in mind when consulting with an attorney. The reality is that we likely have thousands of dollars of what could be considered digital assets. Inventorying them and ascribing a fair market value to them along with your legal professional is the first step in a fair and just settlement.
The post Digital Divorce: Who Gets the Airline Miles and Music Files? appeared first on McAfee Blogs.
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