Suspicious RDP Enablement via fDenyTSConnections Registry Modification
- Product
- windows
- Category
- registry_set
- Author
- HuntRule
- Published
- 2026-10-01
- Updated
- 2026-10-01
ATT&CK techniques
Persistence → Lateral MovementRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects modification of the fDenyTSConnections registry value to zero, which enables inbound Remote Desktop connections. Akira ransomware operators toggled this value to open RDP for lateral movement across victim hosts. Enabling RDP outside of change control frequently precedes hands-on lateral movement and ransomware staging.
Reporting behind it
- huntress.comhttps://www.huntress.com/blog/akira-ransomware-indicators
- attack.mitre.orghttps://attack.mitre.org/techniques/T1021/001/
- securelist.comhttps://securelist.com/cuba-ransomware/110533/
- intel471.comhttps://www.intel471.com/blog/a-look-at-trending-chinese-apt-techniques
- attack.mitre.orghttps://attack.mitre.org/techniques/T1021.001/
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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