PH_Rule_SIGMA_672
Enabled
Detects Processes accessing the camera and microphone from suspicious folder. This rule is adapted from https://github.com/SigmaHQ/sigma/blob/master/rules/windows/registry/registry_event/registry_event_susp_mic_cam_access.yml
7
Security
Collection
Collection consists of techniques adversaries may use to gather information and the sources information is collected from that are relevant to following through on the adversary's objectives. Frequently, the next goal after collecting data is to steal (exfiltrate) the data. Common target sources include various drive types, browsers, audio, video, and email. Common collection methods include capturing screenshots and keyboard input.
https://attack.mitre.org/tactics/TA0009T1125
Video Capture
An adversary can leverage a computer's peripheral devices (e.g., integrated cameras or webcams) or applications (e.g., video call services) to capture video recordings for the purpose of gathering information. Images may also be captured from devices or applications, potentially in specified intervals, in lieu of video files. Malware or scripts may be used to interact with the devices through an available API provided by the operating system or an application to capture video or images.
https://attack.mitre.org/techniques/T1125Server
Windows Sysmon via FortiSIEM Agent
Correlation
No remediation guidance specified
If the following pattern or patterns match an ingested event within the given time window in seconds, trigger an incident.
300 seconds
If the following defined pattern/s occur within a 300 second time window.
Filter
This is the named definition of the event query, this is important if multiple subpatterns are defined to distinguish them.
This is the query logic that matches incoming events
eventType REGEXP "Win-Sysmon-12-Registry-.*|Win-Sysmon-13-Registry-.*|Win-Sysmon-14-Registry-.*" AND regKeyPath REGEXP ".*\\Software\\Microsoft\\Windows\\CurrentVersion\\CapabilityAccessManager\\ConsentStore\\.*" AND regKeyPath REGEXP ".*\\NonPackaged.*" AND regKeyPath REGEXP ".*microphone.*|.*webcam.*" AND regKeyPath REGEXP ".*:#Temp#.*|.*:#Users#Default#.*|.*:#Users#Desktop#.*|.*:#Users#Public#.*|.*:#Windows#Temp#.*|.*:#\$Recycle\.bin#.*"
This defines how matching events are aggregated, only events with the same matching attribute values are grouped into one unique incident ID
hostName,regKeyPath
This is most typically a numerical constraint that defines when the rule should trigger an incident
COUNT(*) >= 1
This section defines which fields in matching raw events should be mapped to the incident attributes in the resulting incident.
The available raw event attributes to map are limited to the group by attributes and the aggregate event constraint fields for each subpattern
hostName = Filter.hostName,
regKeyPath = Filter.regKeyPath