Adversaries may use Obfuscated Files or Information to hide artifacts of an intrusion from analysis.
- Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- Datamodel: Endpoint, Endpoint_Processes
- Last Updated: 2021-03-24
- Author: Michael Haag, Splunk
- ID: 0bd01a54-8cbe-11eb-abcd-acde48001122
An example of obfuscated files is
Certutil.exe usage to encode a portable executable to a certificate file, which is base64 encoded, to hide the originating file. There are many utilities cross-platform to encode using XOR, using compressed .cab files to hide contents and scripting languages that may perform similar native Windows tasks. Triaging an event related will require the capability to review related process events and file modifications. Using a tool such as CyberChef will assist with identifying the encoding that was used, and potentially assist with decoding the contents.
|CertUtil With Decode Argument||Deobfuscate/Decode Files or Information||TTP|
|Windows CertUtil Decode File||Deobfuscate/Decode Files or Information||TTP|
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