Anvilogic high experimental spl

Certutil Obfuscate_Encode Files [splunk-winevent]

Certutil can be used to encode files to evade defensive measures. -- Threat Actor Association: APT29/Nobelium/Cozy Bear, Arid Viper/APT C-23, BlackTech - Software Association: Conti

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Detection Logic

`get_endpoint_data` `get_endpoint_data_winevent` (TERM(EventCode=4688) 
OR "<EventID>4688<" 
OR Type=Process) ("certutil" (TERM(-encode) 
OR TERM(-encodehex))) 
OR (TERM(-encode) 
OR TERM(-encodehex))
| table _time, host, user, signature_id, process, process_*, parent_*
| bin span=1s
| stats values(*) as * by _time, host
| where match(process, "(?i)-encode")

Field Validations

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