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New Locky ransomware: what you need to know

New Locky ransomware: what you need to know

New Locky ransomware: what you need to know

In 2016, the Locky ransomware infected millions of users with a Microsoft Word file. It was eventually contained, and cyber security firms have since created protections to detect and block previous Locky variants. However, a similar malware is currently spreading worldwide and has so far infected tens of thousands of computers.

Quick facts

According to a threat intelligence report, the email-based ransomware attacks started on August 9 and were detected through 62,000 phishing emails in 133 countries in just three days. It also revealed that 11,625 IP addresses were used to carry out the attacks, with the IP range owners consisting mostly of internet service providers and telecom companies.

How it works

The malicious email contains an attachment named “E 2017-08-09 (580).vbs” and just one line of text. Like the original Locky authors, attackers responsible for the new variant deploy social engineering tactics to scam recipients into opening the attached .doc, zip, pdf, .jpg or tiff file, which installs the ransomware into their systems.

When an unsuspecting user downloads the file, the macros run a file that provides the encryption Trojan with an entry point into the system. The Trojan then encrypts the infected computer’s files.

Once encryption is completed, the user receives instructions to download the Tor browser so they can access the “dark web” for details on how to pay the ransom. To retrieve their encrypted files, users will be asked to pay from 0.5-1 Bitcoin.

What you need to do

This ransomware variant builds on the strengths of previous Trojans. In fact, the original Locky strain made it easy for cyber criminals to develop a formidable ransomware that could evade existing cyber security solutions. This is why adopting a “deny all” security stance, whereby all files are considered unsafe until proven otherwise, is the best way to avoid infection.

Here are other tips to avoid infection:

  • Don’t open unsolicited attachments in suspicious emails. Alert your IT staff, and most importantly disallow macros in Microsoft Office unless they’ve been verified by your IT team.
  • Performing regular backups guarantees you never have to pay cyber criminals a ransom. If all other security measures fail, you can always rely on your backups, which protect your business not just from cyber crime-related disasters, but also from natural and other unforeseen system failures.
  • Train your staff to identify online scams like phishing. This and other similar ransomware strains take advantage of users’ lack of cyber security training.
  • Update your operating systems as soon as updates become available to reduce, or eliminate, the chances of your system’s vulnerabilities being exploited.

Even with a trained staff and the latest protections installed, your IT infrastructure may still have unidentified security holes. Cyber security experts can better evaluate your entire infrastructure and recommend the necessary patches for your business’s specific threats. To secure your systems, get in touch with our experts now.

Published with permission from TechAdvisory.org. Source.

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Dropsuite is a cloud software platform enabling businesses and organizations globally to easily backup, recover and protect their important business information including emails, contacts, calendars and OneDrive/Sharepoint files. Compliant email backup and archive system with a 10-year retention policy.

Vade Secure:

Vade Secure is an AI-based email security solution to improve security for Office 365 and block advanced phishing, spear phishing, and advanced malware threats. Vade Secure analyzes emails, webpages, attachments, and images with machine learning and deep learning algorithms that are trained to detect behaviors and anomalies common to advanced email threats.

Office Protect:

Office Protect is a service that’s designed to help you secure your Microsoft 365 tenant. Using our powerful in-house security software, our analysts actively monitor for threats, investigate alerts, eliminate false positives, and provide guided response and remediation. Protects against account break-ins, data exfiltration, business email compromise, phishing, internal threats, lateral movement, ransomware, and attacks by nation states.

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ThreatLocker:

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ThreatLocker provides a solution that allows businesses to control the content that runs on their network. Unlike AntiVirus software ThreatLocker is not looking for known viruses or malware. ThreatLocker uses a complex set of rules to determine what can be executed on a network and stops anything that has not been approved before it can even execute.

Huntress:

Huntress is a supplement to SentinelOne. Hackers are becoming more sophisticated, and Huntress actively seeks out these threat actors with a "defend forward" mentality. This software combines both advanced security tools along with human intervention to ensure even the most advanced hackers can't penetrate your network.

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SentinelOne is a comprehensive enterprise security platform that provides threat detection, hunting, and response features that enable organizations to discover vulnerabilities and protect IT operations. SentinelOne integrates static artificial intelligence (AI) to provide real-time endpoint protection and reduce false positives that derail investigations or make threat detection a capital-intensive process. This will replace Webroot in your current environment.