ATT&CK coverage › Technique
Application Layer Protocol T1071
Adversaries may communicate using OSI application layer protocols to avoid detection/network filtering by blending in with existing traffic. Commands to the remote system, and often the results of those commands, will be embedded within the protocol traffic between the client and server.
Events covered
13 catalog events are tagged with this technique by at least one rule.
Authoring guide
Patterns shared across the 10 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 (14 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.
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 4 rules
- Github Self-Hosted Runner Execution
- HackTool - SILENTTRINITY Stager DLL Load
- HackTool - SILENTTRINITY Stager Execution
- Potentially Suspicious Rundll32.EXE Execution of UDL File
Splunk 3 rules
- Windows App Layer Protocol Qakbot NamedPipe
- Windows App Layer Protocol Wermgr Connect To NamedPipe
- Windows Application Layer Protocol RMS Radmin Tool Namedpipe