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Description

The stealing of data by an adversary.

Narrative

Exfiltration comes in many flavors. Adversaries can collect data over encrypted or non-encrypted channels. They can utilise Command and Control channels that are already in place to exfiltrate data. They can use both standard data transfer protocols such as FTP, SCP, etc to exfiltrate data. Or they can use non-standard protocols such as DNS, ICMP, etc with specially crafted fields to try and circumvent security technologies in place.

Detections

Name Technique Type
DNS Exfiltration Using Nslookup App Exfiltration Over Alternative Protocol TTP
DNS Exfiltration Using Nslookup App Exfiltration Over Alternative Protocol TTP
Detect DGA domains using pretrained model in DSDL Domain Generation Algorithms Anomaly
Detect SNICat SNI Exfiltration Exfiltration Over C2 Channel TTP
Detect shared ec2 snapshot Transfer Data to Cloud Account TTP
Excessive Usage of NSLOOKUP App Exfiltration Over Alternative Protocol Anomaly
Gdrive suspicious file sharing Phishing Hunting
Linux Curl Upload File Ingress Tool Transfer TTP
Mailsniper Invoke functions Email Collection, Local Email Collection TTP
Multiple Archive Files Http Post Traffic Exfiltration Over Unencrypted Non-C2 Protocol, Exfiltration Over Alternative Protocol TTP
O365 PST export alert Email Collection TTP
O365 Suspicious Admin Email Forwarding Email Forwarding Rule, Email Collection Anomaly
O365 Suspicious User Email Forwarding Email Forwarding Rule, Email Collection Anomaly
Plain HTTP POST Exfiltrated Data Exfiltration Over Unencrypted Non-C2 Protocol, Exfiltration Over Alternative Protocol TTP

Reference

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