IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Potential SharpRDP Behavior
editPotential SharpRDP Behavior
editIdentifies potential behavior of SharpRDP, which is a tool that can be used to perform authenticated command execution against a remote target via Remote Desktop Protocol (RDP) for the purposes of lateral movement.
Rule type: eql
Rule indices:
- logs-endpoint.events.process-*
- logs-endpoint.events.registry-*
- logs-endpoint.events.network-*
Severity: high
Risk score: 73
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Domain: Endpoint
- OS: Windows
- Use Case: Threat Detection
- Tactic: Lateral Movement
- Data Source: Elastic Defend
Version: 108
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule query
edit/* Incoming RDP followed by a new RunMRU string value set to cmd, powershell, taskmgr or tsclient, followed by process execution within 1m */
sequence by host.id with maxspan=1m
[network where host.os.type == "windows" and event.type == "start" and process.name : "svchost.exe" and destination.port == 3389 and
network.direction : ("incoming", "ingress") and network.transport == "tcp" and
source.ip != "127.0.0.1" and source.ip != "::1"
]
[registry where host.os.type == "windows" and event.type == "change" and process.name : "explorer.exe" and
registry.path : ("HKEY_USERS\\*\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\RunMRU\\*") and
registry.data.strings : ("cmd.exe*", "powershell.exe*", "taskmgr*", "\\\\tsclient\\*.exe\\*")
]
[process where host.os.type == "windows" and event.type == "start" and
(process.parent.name : ("cmd.exe", "powershell.exe", "taskmgr.exe") or process.args : ("\\\\tsclient\\*.exe")) and
not process.name : "conhost.exe"
]
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/