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Data Tables

  • April 17, 2025
  • 2 replies
  • 29 views

mccrilb
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This showed up in our SIEM today. I have been trying to figure this out. I can get it to work in a UDM search, but not in a rule.

UDM

principal.hostname in regex %CCF_SM_WINDOWS_Hack_Tools_CommandLine_Group1_Exclude.Hostname nocase
target.process.file.full_path in regex %CCF_SM_WINDOWS_Hack_Tools_CommandLine_Group1_Exclude.target_process_file_full_path nocase
 
 
Rule:
or ($e1.principal.hostname in regex %CCF_SM_WINDOWS_Hack_Tools_CommandLine_Group1 nocase
                        and $e1.target.process.file.full_path in regex %CCF_SM_WINDOWS_Hack_Tools_CommandLine_Group1_Exclude.target_process_file_full_path nocase
                        )
 
what am I doing wrong?

 

2 replies

David-French
Staff
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Hey @mccrilb. I'm taking a look at this now. What error are you seeing in the rules editor with the syntax you're using? Cheers


David-French
Staff
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It looks like you haven't specified the column name for the data table "CCF_SM_WINDOWS_Hack_Tools_CommandLine_Group1" in your YARA-L rule logic. If that is indeed a data table then the syntax should be %data_table_name.column_name