IMPORTANT: No additional bug fixes or documentation updates will be released for this version.
RDP (Remote Desktop Protocol) from the Internetedit
Detects network events that may indicate the use of RDP traffic from the Internet. RDP is commonly used by system administrators to remotely control a system for maintenance or to use shared resources. It should almost never be directly exposed to the Internet, as it is frequently targeted and exploited by threat actors as an initial access or back-door vector.
Rule type: query
Rule indices:
- filebeat-*
Severity: medium
Risk score: 47
Runs every: 5 minutes
Searches indices from: now-6m (Date Math format, see also Additional look-back time)
Maximum signals per execution: 100
Tags:
- Elastic
- Network
Version: 3 (version history)
Added (Elastic Stack release): 7.6.0
Last modified (Elastic Stack release): 7.7.0
Potential false positivesedit
Some network security policies allow RDP directly from the Internet but usage that is unfamiliar to server or network owners can be unexpected and suspicious. RDP services may be exposed directly to the Internet in some networks such as cloud environments. In such cases, only RDP gateways, bastions or jump servers may be expected expose RDP directly to the Internet and can be exempted from this rule. RDP may be required by some workflows such as remote access and support for specialized software products and servers. Such work- flows are usually known and not unexpected.
Rule queryedit
network.transport:tcp and destination.port:3389 and not source.ip:(10.0.0.0/8 or 172.16.0.0/12 or 192.168.0.0/16) and destination.ip:(10.0.0.0/8 or 127.0.0.0/8 or 172.16.0.0/12 or 192.168.0.0/16 or "::1")
Threat mappingedit
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Command and Control
- ID: TA0011
- Reference URL: https://attack.mitre.org/tactics/TA0011/
-
Technique:
- Name: Commonly Used Port
- ID: T1043
- Reference URL: https://attack.mitre.org/techniques/T1043/
-
Tactic:
- Name: Lateral Movement
- ID: TA0008
- Reference URL: https://attack.mitre.org/tactics/TA0008/
-
Technique:
- Name: Remote Services
- ID: T1021
- Reference URL: https://attack.mitre.org/techniques/T1021/
-
Tactic:
- Name: Initial Access
- ID: TA0001
- Reference URL: https://attack.mitre.org/tactics/TA0001/
-
Technique:
- Name: Exploit Public-Facing Application
- ID: T1190
- Reference URL: https://attack.mitre.org/techniques/T1190/
Rule version historyedit
- Version 3 (7.7.0 release)
-
Updated query, changed from:
network.transport: tcp and destination.port: 3389 and ( network.direction: inbound or ( not source.ip: (10.0.0.0/8 or 172.16.0.0/12 or 192.168.0.0/16) and destination.ip: (10.0.0.0/8 or 172.16.0.0/12 or 192.168.0.0/16) ) )
- Version 2 (7.6.1 release)
-
- Removed auditbeat-*, packetbeat-*, and winlogbeat-* from the rule indices.