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https://github.com/splunk/security_content
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Eric
76 lines
3.5 KiB
YAML
76 lines
3.5 KiB
YAML
name: Create Remote Thread In Shell Application
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id: 10399c1e-f51e-11eb-b920-acde48001122
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version: 8
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date: '2025-05-02'
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author: Teoderick Contreras, Splunk
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status: production
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type: TTP
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description: The following analytic detects suspicious process injection in command
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shell applications, specifically targeting `cmd.exe` and `powershell.exe`. It leverages
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Sysmon EventCode 8 to identify the creation of remote threads within these shell
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processes. This activity is significant because it is a common technique used by
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malware, such as IcedID, to inject malicious code and execute it within legitimate
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processes. If confirmed malicious, this behavior could allow an attacker to execute
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arbitrary code, escalate privileges, or maintain persistence within the environment,
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posing a severe threat to system security.
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data_source:
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- Sysmon EventID 8
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search: '`sysmon` EventCode=8 TargetImage IN ("*\\cmd.exe", "*\\powershell*", "*\\pwsh.exe")
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| stats count min(_time) as firstTime max(_time) as lastTime by EventID Guid NewThreadId
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ProcessID SecurityID SourceImage SourceProcessGuid SourceProcessId StartAddress
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StartFunction StartModule TargetImage TargetProcessGuid TargetProcessId UserID dest
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parent_process_exec parent_process_guid parent_process_id parent_process_name parent_process_path
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process_exec process_guid process_id process_name process_path signature signature_id
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user_id vendor_product | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
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| `create_remote_thread_in_shell_application_filter`'
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how_to_implement: To successfully implement this search, you need to be ingesting
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logs with the process name, parent process, and command-line executions from your
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endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the
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Sysmon TA.
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known_false_positives: unknown
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references:
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- https://thedfirreport.com/2021/07/19/icedid-and-cobalt-strike-vs-antivirus/
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drilldown_searches:
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- name: View the detection results for - "$dest$"
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search: '%original_detection_search% | search dest = "$dest$"'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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- name: View risk events for the last 7 days for - "$dest$"
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search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$")
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starthoursago=168 | stats count min(_time) as firstTime max(_time) as lastTime
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values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories)
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as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic)
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as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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rba:
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message: process $process_name$ create a remote thread to shell app process $TargetImage$
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in host $dest$
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risk_objects:
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- field: dest
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type: system
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score: 70
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threat_objects:
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- field: process_name
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type: process_name
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tags:
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analytic_story:
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- IcedID
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- Qakbot
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- Warzone RAT
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asset_type: Endpoint
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mitre_attack_id:
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- T1055
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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security_domain: endpoint
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tests:
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- name: True Positive Test
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attack_data:
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- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/icedid/simulated_icedid/windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: XmlWinEventLog
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