Potential Outgoing RDP Connection by Unusual Processedit
Adversaries may attempt to connect to a remote system over Windows Remote Desktop Protocol (RDP) to achieve lateral movement. Adversaries may avoid using the Microsoft Terminal Services Client (mstsc.exe) binary to establish an RDP connection to evade detection.
Rule type: eql
Rule indices:
- logs-endpoint.events.network-*
Severity: low
Risk score: 21
Runs every: 60m
Searches indices from: now-119m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References: None
Tags:
- Domain: Endpoint
- OS: Windows
- Use Case: Threat Detection
- Tactic: Lateral Movement
- Data Source: Elastic Defend
Version: 3
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule queryedit
network where host.os.type == "windows" and
event.action == "connection_attempted" and destination.port == 3389 and
destination.ip != "::1" and destination.ip != "127.0.0.1" and
not (
process.executable : (
"?:\\Windows\\System32\\mstsc.exe",
"?:\\Program Files (x86)\\mRemoteNG\\mRemoteNG.exe",
"?:\\Program Files (x86)\\PRTG Network Monitor\\PRTG Probe.exe",
"?:\\Program Files\\Azure Advanced Threat Protection Sensor\\*\\Microsoft.Tri.Sensor.exe",
"?:\\Program Files (x86)\\Microsoft\\Remote Desktop Connection Manager\\RDCMan.exe",
"?:\\Program Files\\SentinelOne\\Sentinel Agent*\\Ranger\\SentinelRanger.exe",
"?:\\Program Files\\Devolutions\\Remote Desktop Manager\\RemoteDesktopManager.exe",
"?:\\Program Files (x86)\\Devolutions\\Remote Desktop Manager\\RemoteDesktopManager.exe"
) and process.code_signature.trusted == true
)
Framework: MITRE ATT&CKTM
-
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/
-
Sub-technique:
- Name: Remote Desktop Protocol
- ID: T1021.001
- Reference URL: https://attack.mitre.org/techniques/T1021/001/