Execution Path Analysis: GSocket's execution path begins with the exploitation of a vulnerability in a web application, leading to the deployment of the GSocket client on the compromised host. The client establishes an outbound connection to the Global Socket Relay Network, facilitating encrypted communication with the threat actor. This approach effectively bypasses traditional network defenses that focus on inbound traffic, allowing threat actors to maintain persistent access without the need for dedicated infrastructure.

# Sigma Rule for GSocket Detection

logsource:
  category: network_connection
  product: linux

detection:
  selection:
    OutboundConnection:
      - 'relay.gsocket.io'
  condition: selection

fields:
  - source_ip
  - destination_ip
  - destination_port

falsepositives:
  - Legitimate use of GSocket for remote administration

level: high

Choke Point Mitigation: To mitigate the threat posed by GSocket, organizations should implement structural Zero Trust principles that focus on verifying every connection, regardless of its origin. Deploying Web Application Firewalls (WAFs) with rules to detect and block unauthorized outbound connections to known relay networks can help intercept GSocket traffic. Additionally, enhancing egress filtering policies to monitor and restrict outbound connections based on destination reputation and behavior can prevent unauthorized communication with external relay services.