Episode 2: How to Find Passwords on Network Shares Before Attackers Do
Aug 10, 2022
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The discussion dives into the criticality of recognizing artifacts in network file shares during internal penetration tests. Discover the interplay between user behavior and access permissions that can create vulnerabilities. Learn how sensitive information, like passwords and credentials, often lurks on file shares, waiting to be exploited. The speakers highlight the dangers of reused credentials and reveal tools like PowerView that can enhance network security. Valuable best practices for auditing permissions and safeguarding sensitive data are shared throughout.
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Quick takeaways
Overly permissive access configurations on file shares lead to sensitive data exposure, posing significant risks for potential attackers.
Regular auditing of access permissions and proactive manual searches for sensitive information are essential for enhancing organizational security.
Deep dives
The Issue with File Shares
File shares are often configured with overly permissive access, allowing many users to access sensitive information that they should not. This issue arises from a combination of user behavior and organizational culture, which encourages open access to facilitate work efficiency. IT departments may prioritize accessibility over security, leading to practices that compromise sensitive data protection. This results in network shares being filled with confidential documents, personal data, and even password files, making them a prime target for attackers during penetration tests.
Common Vulnerabilities Found
During internal penetration tests, sensitive information is frequently discovered on file shares, often including items like scanned documents, invoices, and passwords. In a majority of engagements, testers find some form of sensitive data, with critical findings leading to domain administrator access in a smaller percentage, typically around 5%. Exploring config and unattend files often reveals embedded credentials that can be easily exploited. Administrators inadvertently expose these vulnerabilities by reusing passwords and failing to secure sensitive files, which poses serious risks to the organization.
Strategies for Reducing Risks
Organizations can proactively protect their file shares by conducting manual searches for sensitive information and auditing access permissions regularly. Implementing user education programs can help mitigate the effects of user behavior that contributes to security risks. Utilizing available tools, such as PowerView and SM Beagle, can automate the process of identifying sensitive files and access control weaknesses. By starting with small, manageable actions, IT departments can gradually enhance security and reduce the risk of sensitive information being improperly accessed or exploited.