Addressing Ransomware Attacks


ransomwareFirst, what exactly are ransomware attacks and what’s the motivation behind them? Motivation seems easy enough to decipher – it’s monetary greed. In every instance I’d read about, there’s always some monetary demand to decipher their sites, generally in BitCoin payments (the preferred currency of cybercriminals everywhere).

One definition is, “Ransomware is a subset of malware in which the data on a victim’s computer is locked, typically by encryption, and payment is demanded before the ransomed data is decrypted and access returned to the victim.”

The most common source of ransomware attacks

Malicious email attachments are high on our list as a common source of ransomware attacks, followed by software applications (and external storage devices) that have been infected, and what we see more often than not – websites that have been compromised. RDP (remote desktop protocol) is also used simply because it doesn’t rely on user interaction.

Can’t log into your site?

In some instances, cybercriminals use a lockscreen variant whereby they alter their victim’s logins.

Has your data been kidnapped?

Here your data files are encrypted, not necessarily only to the infected device, but to other network devices that are connected.

Early attacks could be reverse engineered, but …

You guessed it. While early attacks could be reverse engineered relatively easily, cybercriminals have developed enhanced versions that utilize exceptionally strong public key encryption.

Previous versions of ransomware attacks

When discussing public key encryption, one of the earliest versions of ransomware that used this was a Trojan horse by the name of Cryptolocker. As usual, the attackers demanded payment via bitcoin, and at the time, because of the RSA cryptology used, this was highly effective malware. Fortunately, the encryption keys for this variant were discovered leading to the development of an online tool that facilitated recovery, effectively defanging the malware.

Ransomwares attacks in 2017

A more recent attack, defined as WannaCry was disseminated in the Spring of 2017 that infected over 250,000 systems around the world. This malware utilized asymmetric encryption, making recovery difficult. Why? Using this variant, victims faced increasingly difficult recovery paths attempting to discover the private and undistributed key that was necessary for decryption.

Once again, payments via bitcoin were demanded, simply because they couldn’t be traced to the recipients. The net estimated damage from this attack alone may have exceeded $1 billion dollars.

Does paying ransomware demands guarantee you’ll get your files back?

Unfortunately, paying ransomware demands does NOT guarantee that you’ll get your files back. As recently as 2016, 20 percent of firms or organizations that payed these fees did NOT get their data back.

The average amount of ransom demanded currently exceeds $1000

The estimated percentage of business executives that actually paid these demands ranges from 3 to 70 percent, so those aren’t exactly rocket science numbers, although across the board, fewer percentages of US companies tend to pay.

Are internet of things (IoT) vulnerable to ransomware attacks?

Unfortunately, yes, IoT is vulnerable, so it’s imperative that you take precautions. We’re talking about smart thermostats, refrigerators and security systems, as well as many other devices.

Who actually uses ransomware?

Unbelievably, ransomware kits on currently available on the dark web for less money than you might imagine. And you don’t have to be a computer geek to purchase and implement an attack. In some scenarios, the seller of the ransomware malware actually collects the ransomware payments, takes their percentage of the loot and distributes the remaining amount to the purchaser.

How would you know you were attacked?

Of course, there are the more obvious signs of attack like receiving a pop up message telling you that you’ve been attacked. Of course, the approach these cybercriminals take to extort digital currency for their misdeeds vary. Some victims are given deadlines to pay and some are simply threatened by promising to expose confidential information or data.

The key to minimizing ransomware attacks is prevention

First and foremost, backup your data in multiple locations, online and offline remotely and don’t click on suspicious attachments in emails, especially from strangers.

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Steve

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