ATT&CK coverage › Technique
Exfiltration Over Web Service: Exfiltration to Cloud Storage T1567.002
Adversaries may exfiltrate data to a cloud storage service rather than over their primary command and control channel. Cloud storage services allow for the storage, edit, and retrieval of data from a remote cloud storage server over the Internet.
Events covered
6 catalog events are tagged with this technique by at least one rule.
Authoring guide
Patterns shared across the 12 rules above: which fields they filter on, what specific values they look for, and what they exclude. Field names are normalized across vendors so Sigma's Image, Elastic's process.name, and Splunk's process_name collapse into one row. Each rule contributes at most once per row.
Fields filtered most (7 distinct)
The fields most rules look at when detecting this technique. The How column shows the operators authors use (eq, wildcard, regex_match, match) and how often each appears. Sample values are concrete examples to start from, not an exhaustive list.
Top indicator values (47 distinct)
Specific (field, operator, value) combinations the rules check for, ranked by how many rules under this technique use each one. The Corpus reach column counts how many rules across the entire catalog (any technique) check the same combination. High numbers point to widely-used indicators that are likely noisy on their own; combine them with another condition for useful signal. Blank means the combination is specific to rules under this technique.
Rules under this technique
Every rule in the catalog tagged with this technique, grouped by vendor. Click a rule title for its full predicates, exclusions, and indicators.
Sigma 11 rules
- DNS Query for Anonfiles.com Domain - DNS Client
- DNS Query for Anonfiles.com Domain - Sysmon
- DNS Query To MEGA Hosting Website
- DNS Query To MEGA Hosting Website - DNS Client
- DNS Query To Ufile.io
- DNS Query To Ufile.io - DNS Client
- Network Connection Initiated To Mega.nz
- PUA - Rclone Execution
- PUA - Restic Backup Tool Execution
- Rclone Config File Creation
- Suspicious Dropbox API Usage