Added Fake CAPTCHA Campaign new rules #5058
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+74
−0
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Summary of the Pull Request
Many threat actors have been using the Fake CAPTCHA to trick their victims into pasting malicious PowerShell command in the windows run dialog.
I added 2 new rules:
A detection rule that looks for suspicious PowerShell commands in the RunMru registry key. this key stores execution from the run dialog.
A threat hunting rule that looks for any suspicous commands in the runmru key this is to detect if the threat actor is not using powershell or used the same teqnique capitcha but with diffrent approach this rule has a high false postive becouse it is a hunting rule.
More detailes are mentioned in my blog
Changelog
new: Suspicious PowerShell Commands in RunMRU key
new: Suspicious Commands in RunMRU key (Threat hunting)
Example Log Event
Fixed Issues
SigmaHQ Rule Creation Conventions