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T1133

External Remote Services

Initial Access

Adversaries may leverage external-facing remote services to gain initial access. Remote services such as VPNs, Citrix, and other access mechanisms can be abused.

View on MITRE ATT&CK

Defense Strategies

  • Multi-factor authentication
  • Network segmentation
  • Limit external service exposure
  • Regular credential rotation

Detection Methods

  • Monitor authentication logs
  • Detect unusual login times/locations
  • Track failed authentication attempts

Related Techniques in Initial Access

T1566

Phishing

T1190

Exploit Public-Facing Application

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