diff --git a/rules/windows/lateral_movement_rdp_sharprdp_target.toml b/rules/windows/lateral_movement_rdp_sharprdp_target.toml new file mode 100644 index 000000000..fa35a2ef5 --- /dev/null +++ b/rules/windows/lateral_movement_rdp_sharprdp_target.toml @@ -0,0 +1,59 @@ +[metadata] +creation_date = "2020/11/11" +maturity = "production" +updated_date = "2020/11/11" + +[rule] +author = ["Elastic"] +description = """ +Identifies 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. +""" +from = "now-9m" +index = ["logs-endpoint.events.*", "winlogbeat-*"] +language = "eql" +license = "Elastic License" +name = "Potential SharpRDP Behavior" +references = [ + "https://posts.specterops.io/revisiting-remote-desktop-lateral-movement-8fb905cb46c3", + "https://github.com/sbousseaden/EVTX-ATTACK-SAMPLES/blob/master/Lateral%20Movement/LM_sysmon_3_12_13_1_SharpRDP.evtx", +] +risk_score = 73 +rule_id = "8c81e506-6e82-4884-9b9a-75d3d252f967" +severity = "high" +tags = ["Elastic", "Host", "Windows", "Threat Detection", "Lateral Movement"] +type = "eql" + +query = ''' +/* 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 event.type == "start" and process.name : "svchost.exe" and destination.port == 3389 and + network.direction == "incoming" and network.transport == "tcp" and + source.address != "127.0.0.1" and source.address != "::1" + ] + + [registry where 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 event.type in ("start", "process_started") and + (process.parent.name : ("cmd.exe", "powershell.exe", "taskmgr.exe") or process.args : ("\\\\tsclient\\*.exe")) and + not process.name : "conhost.exe" + ] +''' + + +[[rule.threat]] +framework = "MITRE ATT&CK" +[[rule.threat.technique]] +id = "T1021" +name = "Remote Services" +reference = "https://attack.mitre.org/techniques/T1021/" + + +[rule.threat.tactic] +id = "TA0008" +name = "Lateral Movement" +reference = "https://attack.mitre.org/tactics/TA0008/"