https://github.com/DissectMalware/base64_substring

Generate a Yara rule to find base64-encoded files containg a specific keyword
https://github.com/DissectMalware/base64_substring

base64 python3 search-in-base64 yara yara-rule-generator

Last synced: 3 months ago
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Generate a Yara rule to find base64-encoded files containg a specific keyword

• Host: GitHub
• URL: https://github.com/DissectMalware/base64_substring
• Owner: DissectMalware
• License: apache-2.0
• Created: 2018-07-13T02:59:51.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2018-07-13T13:46:08.000Z (over 6 years ago)
• Last Synced: 2024-05-02T03:49:34.632Z (6 months ago)
• Topics: base64, python3, search-in-base64, yara, yara-rule-generator
• Language: Python
• Homepage:
• Size: 11.7 KB
• Stars: 40
• Watchers: 6
• Forks: 3
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# About

Often malware analysts require to search through base64-encoded samples with a search term such as Application.Run. base64_substring helps them by enumerating all possible base64 encoding for a given search term and generating a yara rule that checks those possiblities.

# How to Run

Example: generating a yara rule that matches base64-encoded file containing *Application* term.

```

> python generate_yara_rule.py

> Please enter a rule name

  MyRule

> Please enter a text

  Application

```

  

# Further Reading

["Searching for Content in Base-64 Strings" by Lee Holmes](http://www.leeholmes.com/blog/2017/09/21/searching-for-content-in-base-64-strings/)