Create sig for likely ransomware asynchronous encryption#535
Create sig for likely ransomware asynchronous encryption#535kevross33 wants to merge 1 commit intoCAPESandbox:masterfrom
Conversation
Summary of ChangesHello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request introduces a new detection mechanism aimed at identifying ransomware that utilizes asynchronous encryption techniques. By observing the binding of numerous files to I/O Completion Ports, the new signature helps to flag suspicious processes that might be encrypting user data, thereby enhancing the system's ability to detect and respond to ransomware threats. Highlights
🧠 New Feature in Public Preview: You can now enable Memory to help Gemini Code Assist learn from your team's feedback. This makes future code reviews more consistent and personalized to your project's style. Click here to enable Memory in your admin console. Changelog
Using Gemini Code AssistThe full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips. Invoking Gemini You can request assistance from Gemini at any point by creating a comment using either
Customization To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a Limitations & Feedback Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments. If you're interested in giving your feedback about your experience with Gemini Code Assist for Github and other Google products, sign up here. You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension. Footnotes
|
![gemini-code-assist[bot]](https://avatars.githubusercontent.com/in/956858?s=60&v=4){kind=small}
There was a problem hiding this comment.
Code Review
This pull request introduces a new Cuckoo signature for detecting potential ransomware activity that uses asynchronous encryption with I/O Completion Ports. The overall logic is good. I've provided a few suggestions to improve the code's readability and maintainability by removing an unused variable, simplifying a conditional statement, and refactoring a method to be more concise.
| def __init__(self, *args, **kwargs): | ||
| Signature.__init__(self, *args, **kwargs) | ||
| self.iocp_files = set() | ||
| self.example_file = None |
There was a problem hiding this comment.
The instance variable self.example_file is initialized but never used within the class. It should be removed to improve code clarity and eliminate dead code.
| def on_call(self, call, process): | ||
| info_class = self.get_argument(call, "FileInformationClass") | ||
|
|
||
| if info_class == 30 or str(info_class) == "30" or str(info_class).upper() == "FILECOMPLETIONINFORMATION": |
There was a problem hiding this comment.
The condition to check info_class is a bit verbose and can be simplified. You can make it more readable and robust by converting info_class to an uppercase string and checking if it's one of the expected values.
| if info_class == 30 or str(info_class) == "30" or str(info_class).upper() == "FILECOMPLETIONINFORMATION": | |
| if str(info_class).upper() in ("30", "FILECOMPLETIONINFORMATION"): |
| ret = False | ||
| if len(self.iocp_files) > 50: | ||
| self.data.append({ | ||
| "total_files_bound_to_iocp": len(self.iocp_files), | ||
| }) | ||
| ret = True | ||
|
|
||
| return ret |
There was a problem hiding this comment.
The on_complete method can be made more concise by removing the ret flag variable and returning directly. This is a more common and idiomatic pattern in Python.
| ret = False | |
| if len(self.iocp_files) > 50: | |
| self.data.append({ | |
| "total_files_bound_to_iocp": len(self.iocp_files), | |
| }) | |
| ret = True | |
| return ret | |
| if len(self.iocp_files) > 50: | |
| self.data.append({ | |
| "total_files_bound_to_iocp": len(self.iocp_files), | |
| }) | |
| return True | |
| return False |
1 participant
Lockbit
