Name:Create Remote Thread In Shell Application id:10399c1e-f51e-11eb-b920-acde48001122 version:5 date:2024-11-26 author:Teoderick Contreras, Splunk status:production type:TTP Description:The following analytic detects suspicious process injection in command shell applications, specifically targeting `cmd.exe` and `powershell.exe`. It leverages Sysmon EventCode 8 to identify the creation of remote threads within these shell processes. This activity is significant because it is a common technique used by malware, such as IcedID, to inject malicious code and execute it within legitimate processes. If confirmed malicious, this behavior could allow an attacker to execute arbitrary code, escalate privileges, or maintain persistence within the environment, posing a severe threat to system security. Data_source:
-Sysmon EventID 8
search:`sysmon` EventCode=8 TargetImage IN ("*\\cmd.exe", "*\\powershell*", "*\\pwsh.exe") | stats count min(_time) as firstTime max(_time) as lastTime by TargetImage TargetProcessId SourceProcessId EventCode StartAddress SourceImage dest |rename SourceImage as process_name| `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `create_remote_thread_in_shell_application_filter`
how_to_implement:To successfully implement this search, you need to be ingesting logs with the process name, parent process, and command-line executions from your endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the Sysmon TA. known_false_positives:unknown References: -https://thedfirreport.com/2021/07/19/icedid-and-cobalt-strike-vs-antivirus/ drilldown_searches: name:'View the detection results for - "$dest$"' search:'%original_detection_search% | search dest = "$dest$"' earliest_offset:'$info_min_time$' latest_offset:'$info_max_time$' name:'View risk events for the last 7 days for - "$dest$"' search:'| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$") starthoursago=168 | stats count min(_time) as firstTime max(_time) as lastTime values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories) as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic) as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`' earliest_offset:'$info_min_time$' latest_offset:'$info_max_time$' tags: analytic_story: - 'IcedID' - 'Qakbot' - 'Warzone RAT' asset_type:Endpoint confidence:100 impact:70 message:process $process_name$ create a remote thread to shell app process $TargetImage$ in host $dest$ mitre_attack_id: - 'T1055' observable: name:'dest' type:'Hostname' - role: - 'Victim' name:'process_name' type:'Process' - role: - 'Attacker' product: - 'Splunk Enterprise' - 'Splunk Enterprise Security' - 'Splunk Cloud' required_fields: - '_time' - 'SourceImage' - 'TargetImage' - 'TargetProcessId' - 'SourceProcessId' - 'StartAddress' - 'EventCode' - 'dest' risk_score:70 security_domain:endpoint
