Examine our research from the last year in the ReliaQuest 2024 Annual Cyber-Threat Report
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March 26, 2024
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More results...
Ransomware droppers and data ex-filtration and phishing, oh my! Web traffic is an essential part of operations but also represents one of the most dynamic attack surfaces all companies have to secure. The first step to securing this attack surface is installing a web proxy, which introduces an overwhelming volume of logging that’s difficult to regularly audit and comb thru. Enter threat hunting.
Threat hunting is an active form of cyber defense that allows your team to proactively identify abnormal behavior or vulnerabilities and mitigate these before any harm is done. But how do you know what to hunt for? Knowing where to begin and what to look for can be the greatest challenge; that’s why we’re sharing a series of the threat hunting use cases we use, developed and refined by our Research and Development teams over years and across different environments, to help you get started.
Hunting for Enlightenment
One goal of threat hunting is to constantly learn, understand, and improve your environment to set your team up to be able to identify “abnormal” with higher confidence. For instance, in conducting a web proxy threat hunt you may notice anomalous user-agents like Python or cURL sending requests to SharePoint sites within your organization. After documenting this finding, you escalate and learn that this activity is authorized and sourcing from DevOps automation processes. With this enhanced understanding of your environment, you can then enact application control policies to restrict Python and cURL usage to only authorized hosts.
The practice of hunting for ‘enlightenment’ is essential for effective outcomes. In our Threat Hunting Use Case Blog Series, we’ll walk through some of the most common and critical threat hunt campaign objectives, covering log source requirements, expected outcomes, and sample analysis per use case. For this entry, we’ll cover the threat hunting use case of “Web Proxy”.
Objective: Execute this threat hunt to baseline web traffic by devices in the environment in order to identify abnormalities related to malicious activity or policy violations.
Log Source & Requirements: Forward Proxy Logs
Duration: 7 days
Related MITRE Techniques: T1102, T1567, T1566, and T1071
Outcomes:
Make threat hunting a reality at your organization with ReliaQuest GreyMatter.
By aggregating and normalizing your data from disparate tools, such as SIEM, EDR, multi-cloud, and third-party applications, ReliaQuest GreyMatter allows your team to run focused hunt campaigns, both packaged and freeform that are strategic and iterative. Use ReliaQuest GreyMatter to analyze indicators of compromise retrospectively or perform behavior assessments to visualize abnormal from normal activity.
To learn more about building a threat hunting program at your organization, check out our blog, “5 Threat Hunting Guidelines to Transition Your Team From Reactive to Proactive.”
Missed our previous threat hunting use cases? Be sure to check out our use cases that cover:
… and stay tuned for our next threat hunting use case in the series!