Exfiltration Over Web Service
- ID
- T1567
- Tactics
- TA0010 Exfiltration
- Platforms
- ESXi, Linux, macOS, Office Suite, SaaS, Windows
- Data sources
- Process Creation, Network Connection Creation, File Creation, Command Execution, File Access, Network Traffic Flow, Network Traffic Content, Application Log Content
- Source
- attack.mitre.org
- MITRE last modified
- 12 May 2026
Adversaries may use an existing, legitimate external Web service to exfiltrate data rather than their primary command and control channel. Popular Web services acting as an exfiltration mechanism may give a significant amount of cover due to the likelihood that hosts within a network are already communicating with them prior to compromise. Firewall rules may also already exist to permit traffic to these services.
Web service providers also commonly use SSL/TLS encryption, giving adversaries an added level of protection.
Sub-techniques (4)
- T1567.001 Exfiltration to Code Repository
- T1567.002 Exfiltration to Cloud Storage
- T1567.003 Exfiltration to Text Storage Sites
- T1567.004 Exfiltration Over Webhook
Detection
- DET0548 Detection Strategy for Exfiltration Over Web Service
Data components: Process Creation, Network Connection Creation, File Creation, Command Execution, File Access, Network Traffic Flow, Network Traffic Content, Application Log Content
Mitigations (2)
- M1021 Restrict Web-Based Content
Web proxies can be used to enforce an external network communication policy that prevents use of unauthorized external services.
- M1057 Data Loss Prevention
Data loss prevention can be detect and block sensitive data being uploaded to web services via web browsers.