ATT&CK coverage › Technique
Remote Services: Remote Desktop Protocol T1021.001
Adversaries may use Valid Accounts to log into a computer using the Remote Desktop Protocol (RDP). The adversary may then perform actions as the logged-on user.
Events covered
9 catalog events are tagged with this technique by at least one rule.
Authoring guide
Patterns shared across the 23 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 (21 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 (120 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 13 rules
- Denied Access To Remote Desktop
- New Remote Desktop Connection Initiated Via Mstsc.EXE
- Outbound RDP Connections Over Non-Standard Tools
- Port Forwarding Activity Via SSH.EXE
- Potential Tampering With RDP Related Registry Keys Via Reg.EXE
- RDP Enable or Disable via Win32_TerminalServiceSetting WMI Class
- RDP Login from Localhost
- RDP Over Reverse SSH Tunnel
- RDP over Reverse SSH Tunnel WFP
- RDP to HTTP or HTTPS Target Ports
- Suspicious Plink Port Forwarding
- Suspicious RDP Redirect Using TSCON
- User Added to Remote Desktop Users Group
Splunk 10 rules
- Allow Inbound Traffic By Firewall Rule Registry
- Allow Inbound Traffic In Firewall Rule
- Windows Default RDP File Creation By Non MSTSC Process
- Windows Default Rdp File Unhidden
- Windows RDP Bitmap Cache File Creation
- Windows RDP Client Launched with Admin Session
- Windows RDP Login Session Was Established
- Windows RDP Server Registry Entry Created
- Windows Remote Services Allow Remote Assistance
- Windows Remote Services Rdp Enable