Exfiltration Over Web Service
Description
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.
Mapped SPARTA techniques
1 techniques
T1567 'Exfiltration Over Web Service' addresses exfiltration via cloud/web services that are common in development environments (Git hosts, artifact repos, cloud storage); SPARTA EXF-0008 'Compromised Developer Site' covers exactly this pattern (theft of source, test vectors, build artifacts, telemetry captures via the dev environment's web-service infrastructure). Tactic and activity align.
Cross-framework references
Relationships published by the source frameworks themselves, reproduced here with attribution. They are not SafeMode Space mappings and carry no confidence rating of ours.
Countered by 11 in MITRE D3FEND (Defensive Techniques)
- D3-APCAApplication Protocol Command Analysis
- D3-CSPPClient-server Payload Profiling
- D3-NTCDNetwork Traffic Community Deviation
- D3-NTFNetwork Traffic Filtering
- D3-NTSANetwork Traffic Signature Analysis
- D3-OTFOutbound Traffic Filtering
- D3-PHDURAPer Host Download-Upload Ratio Analysis
- D3-PMADProtocol Metadata Anomaly Detection
- D3-RPARelay Pattern Analysis
- D3-RTSDRemote Terminal Session Detection
- D3-UGLPAUser Geolocation Logon Pattern Analysis
Cite as SafeMode Space, mitre-attack-enterprise T1567.