Using SIEM To Detect Ransomware Attacks


Feb 8, 2023

The goal of SIEM technology is to identify potential security threats and suspicious activity that can lead to cyberattacks such as Ransomware. 

In the case of a ransomware attack, SIEM can detect malicious activity, such as unusual file access or modification, and raise an alert. Additionally, the SIEM, such as Microsoft Sentinel can also provide valuable insight for incident response. For example, SIEM can help identify the source of the attack and the extent of the damage. This information can then be used to help mitigate the attack and prevent the further spread of the ransomware. 

In this post, we will discuss how SIEM technologies can reduce Ransomware Breach Face (RBF) and how Difenda’s 5-step approach can help accelerate the deployment of the technology so your business can be protected faster.  

Ransomware Attacks  

A ransomware attack is a type of cyber attack in which an attacker encrypts the victim’s files and demands a ransom payment in exchange for the decryption key. The attacker typically threatens to permanently delete the encrypted files if the ransom is not paid within a certain time frame.  

They can have a significant impact on individuals and organizations, as they can result in loss of access to important data, disruption of business operations, and significant financial losses. 

Ransomware attacks can be delivered through various means, including phishing emails, malicious websites, and unpatched software vulnerabilities.  

In order to prevent ransomware attacks, organizations should implement a robust security posture that includes regular software updates, employee training, backup and recovery solutions, and advanced threat protection technologies

How Does SIEM Technology help mitigate the risk of Ransomware?  

SIEM technology helps mitigate the risk of ransomware by providing real-time monitoring and analysis of security events from various sources within an organization’s network. 

The SIEM aggregates and correlates this information to detect unusual and potentially malicious activity, such as: 

  1. Unusual file access or modification: A SIEM can detect when a large number of files are being encrypted, which is a common tactic used by ransomware. 
  1. Network anomalies: A SIEM can detect network anomalies, such as excessive network traffic, which can indicate a ransomware attack. 
  1. Suspicious user behavior: A SIEM can identify when a user is attempting to access files or systems they shouldn’t be, which can be a sign of a ransomware attack. 

By detecting these types of events, a SIEM can alert security teams to a potential ransomware attack and provide valuable information to help them respond quickly and effectively. Additionally, managed SIEM services, like Difenda’s M-SIEM can also provide threat intelligence and security analytics that can be used to proactively identify and mitigate the latest potential vulnerabilities. 

Sentinel POC

Ransomware Trends in 2023

Ransomware attacks are a constantly evolving threat and new trends are emerging as attackers adapt their techniques.  

Here are some of the ransomware attack trends to be on the lookout for in 2023: 

  1. Increased sophistication: Ransomware attacks are becoming increasingly sophisticated, with attackers using advanced techniques such as lateral movement, data exfiltration, and cloud-based infrastructure to evade detection and increase their success rates. 
  1. Focus on Critical Infrastructure: Ransomware attacks targeting critical infrastructure, such as hospitals and government agencies, are becoming more common as attackers seek to maximize their impact and extort higher ransoms. 
  1. Increased use of Double-Extortion: Attackers are increasingly using a technique called “double-extortion” in which they not only encrypt the victim’s files but also steal sensitive data, which they threaten to release if the ransom is not paid. 
  1. Expansion of Ransomware-as-a-Service: The RaaS model, in which attackers offer ransomware kits and support services to less experienced criminals, is expected to continue to grow, leading to an increase in the number and sophistication of ransomware attacks. 
  1. Emphasis on Ransomware Remediation: As the threat from ransomware continues to grow, organizations will increasingly focus on developing effective remediation strategies to minimize the impact of successful attacks and avoid paying ransoms. 

How Difenda and Microsoft Sentinel Protect Data Against Ransomware Threats 

Microsoft Sentinel is a cloud-native Security Information and Event Management (SIEM) solution that provides multiple security features and technologies to help protect against ransomware attacks. It includes threat intelligence, automated response playbooks, cloud-native security analytics, and backup and recovery capabilities to help organizations quickly detect attacks.  

Sentinel integrates with Microsoft’s cloud-based security solutions, including Microsoft Defender ATP, to provide real-time visibility and protection of endpoints from ransomware and other threats. Paired with the Difenda Shield, businesses receive unrivaled visibility into their security environments.  

Difenda Managed SIEM, powered by Microsoft Sentinel, helps protect data against ransomware threats by providing a comprehensive security solution that integrates multiple security technologies and features. 

  1. Threat Intelligence: Difenda Managed SIEM uses Microsoft Sentinel’s cloud-native threat intelligence capabilities to provide real-time visibility into the latest ransomware threats, allowing organizations to stay ahead of evolving attack methods. 
  2. Automated Response Playbooks: Difenda Managed SIEM includes pre-built response playbooks that are designed to quickly respond to attacks, including isolating the infected system, rolling back to a known good state, and restoring encrypted files from backups. 
  3. Cloud-Native Security Analytics: Difenda Managed SIEM provides cloud-native security analytics, which use machine learning algorithms to detect anomalies and suspicious activity, including ransomware attacks. 
  4. Backup and Recovery: Difenda Managed SIEM includes backup and recovery capabilities that help organizations quickly restore encrypted files and minimize the impact of a successful ransomware attack. 

Both Difenda and Microsoft Sentinel provide advanced security features and technologies to help organizations protect against threats. By integrating these security features and technologies, Difenda Managed SIEM, provides a comprehensive solution to help organizations protect sensitive data and minimize the impact of a successful attack. 

Accelerate SIEM deployment with Difenda’s 5-step approach  

Difenda’s 5-step approach to SIEM involves the following steps: 

  1. Data Collection: The first step is to collect and normalize log data from various sources, such as network devices, servers, endpoints, and applications. 
  1. Data Correlation: The next step is to correlate the collected log data to identify meaningful security events and patterns. 
  1. Threat Detection: The third step is to use the correlated log data to detect potential security threats, such as malware, intrusions, and data breaches. 
  1. Incident Response: The fourth step is to provide actionable information for incident response, such as identifying the source and extent of an attack, and providing recommendations for mitigation. 
  1. Continuous Improvement: The final step is to continuously monitor, analyze, and improve the SIEM solution to stay ahead of evolving security threats and to ensure the most effective protection possible. 

By following these five steps, Difenda’s SIEM solution aims to provide a comprehensive and proactive approach to security information and event management, helping organizations detect, respond to, and prevent cyber threats. 

Is your business suffering from #RBF? Find out and discover the treatment plan in the Ultimate Guide to Treating Ransomware Breach Face.

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