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MediumSplunk security contentTeoderick Contreras +1

Suspicious Image Creation In Appdata Folder

The following analytic detects the creation of image files in the AppData folder by processes that also have a file reference in the same folder. It leverages data from the Endpoint.Processes and Endpoint.Filesystem…

Description

The following analytic detects the creation of image files in the AppData folder by processes that also have a file reference in the same folder. It leverages data from the Endpoint.Processes and Endpoint.Filesystem datamodels to identify this behavior. This activity is significant because it is commonly associated with malware, such as the Remcos RAT, which captures screenshots and stores them in the AppData folder before exfiltrating them to a command-and-control server. If confirmed malicious, this activity could indicate unauthorized data capture and exfiltration, compromising sensitive information and user privacy.

Detection logic

Detection requirements

Platform
LinuxmacOSWindows

The rule states no platform. This is derived from the ATT&CK technique it maps to.

Log source category
sysmon_eventid_1_and_sysmon_eventid_11

Known benign triggers

  • No false positives have been identified at this time.

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