DataTerminology.comNEW
Also known as: Data Exfiltration
Unauthorized transfer or extraction of data from a system, network, or application.
DESCRIPTION
Exfiltration is the stealthy removal of data by malicious actors or insiders. It occurs via network channels, removable media, cloud sync, or covert protocols. Detection leverages telemetry, anomaly detection, and DLP tooling. Prevention includes least privilege, segmentation, egress controls, and encryption. Incident response focuses on containment, forensics, and regulatory reporting. Strong monitoring and governance reduce exfiltration risk across cloud and on-prem environments.
ALTERNATIVE DEFINITIONS
Wikipedia
Data exfiltration is the unauthorized transfer of data from a computer.
Concise definition emphasizing unauthorized data transfer.
MITRE ATT&CK
The adversary is trying to steal data.
Operational framing as a tactic in ATT&CK.
CISA
Data exfiltration occurs when sensitive information is accessed or transferred without authorization.
Focuses on sensitive information and unauthorized access or transfer.
RELATED TERMS
Data Breach Insider Threat Zero Trust Network Segmentation SIEM EDR
COMPETING TERMS
KNOWLEDGE AREAS
Data Security Data Privacy & Compliance Observability & Telemetry
TARGET AUDIENCE
DevOps Engineer Cloud Architect Chief Information Officer Chief Technology Officer Data Governance Manager
EXTERNAL SOURCES
- Wikipedia - Data exfiltration
- MITRE ATT&CK - Exfiltration tactic details
- CISA - Guidance on exfiltration risks
- NIST - Cybersecurity Framework reference
TOP QUESTIONS
What are common exfiltration vectors in cloud environments?
Misconfigured storage, permissive egress, compromised credentials, and shadow data pipelines are typical vectors.
Category: Example
How can Exfiltration be detected early?
Monitor unusual outbound traffic, apply DLP policies, and use behavioral analytics on endpoints and networks.
Category: Requirements
What prevents Exfiltration effectively?
Least privilege access, strong IAM, network segmentation, egress filters, and encryption-at-rest/in-transit.
Category: Best practices
What is the biggest misunderstanding about Exfiltration?
That it only occurs over the network; physical media, screenshots, and covert channels also enable exfiltration.
Category: Misunderstanding
What is the risk of failing to address Exfiltration?
Data breaches, regulatory penalties, reputational damage, and loss of intellectual property.
Category: Risks
How is Exfiltration managed during incidents?
Contain, isolate affected systems, perform forensics, notify stakeholders, and pursue remediation and legal obligations.
Category: Management
What role does Zero Trust play in Exfiltration prevention?
It reduces lateral movement and unauthorized egress by continuous verification and least privilege.
Category: Opinion
How should data teams contribute to Exfiltration defenses?
Classify data, enforce DLP in pipelines, log access, and monitor unusual extract patterns.
Category: Guidance
What tools are relevant to Exfiltration detection?
SIEM, EDR, CASB, DLP, and anomaly detection platforms.
Category: Overview