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Winrar Compressing Dump Files

Sigma Rules

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Summary
This rule aims to detect the execution of WinRAR, a popular file compression utility, specifically looking for cases where it is used to compress files with extensions such as ".dmp" or ".dump". The presence of these file types often indicates that the files may contain sensitive information and could be targets for data exfiltration. The rule utilizes process creation logs from Windows to track the WinRAR applications (rar.exe or winrar.exe) and inspects their command line arguments for any references to dump file extensions. Should a match be found, it indicates a potential unauthorized attempt to exfiltrate data, warranting further investigation. However, there are legitimate scenarios where these conditions may occur, such as for troubleshooting purposes or accidental command line mentions.
Categories
  • Windows
  • Endpoint
Data Sources
  • Process
Created: 2022-01-04