Disable or Modify System Firewall: Cloud Firewall T1686.001
Tactic: Defense Impairment
Adversaries may disable or modify a firewall within a cloud environment to bypass controls that limit access to cloud resources.
Events covered
2 catalog events are tagged with this technique by at least one rule.
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 1 | Process creation |
| Security-Auditing | Event ID 4688 | A new process has been created. |
Authoring guide
Patterns shared across the 12 rules above: which fields they filter on, what specific values they look for, and what they exclude. The catalog normalizes field names 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 (17 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 (39 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. Click a value to expand the rules under this technique that use it.
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 5 rules
- Azure Firewall Modified or Deleted
- Azure Firewall Rule Collection Modified or Deleted
- Azure Network Firewall Policy Modified or Deleted
- New Network ACL Entry Added
- New Network Route Added
Splunk 7 rules
- Allow File And Printing Sharing In Firewall
- Allow Network Discovery In Firewall
- ASL AWS Network Access Control List Created with All Open Ports
- ASL AWS Network Access Control List Deleted
- AWS Network Access Control List Created with All Open Ports
- AWS Network Access Control List Deleted
- O365 Bypass MFA via Trusted IP