iscsicpl

detections/endpoint/windows_dll_search_order_hijacking_with_iscsicpl.yml

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+name: Windows DLL Search Order Hijacking with iscsicpl
+id: f39ee679-3b1e-4f47-841c-5c3c580acda2
+version: 1
+date: '2022-07-29'
+author: Michael Haag, Splunk
+type: TTP
+datamodel:
+- Endpoint
+description: The following analytic identifies a recently disclosed search ordler DLL hijack in iscsicpl.exe. The malicious DLL must be in a new path and iscsicpl.exe, upon load, will execute the payload. The analytic is restricted to Windows shells.
+  Two proof of concepts were identified and utilized to determine the behavior. The command-line is an option to go after, but most likely identifying a child process off iscsicpl.exe will be more effective. Monitoring for suspicious DLL loads is also an option.
+search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
+  as lastTime from datamodel=Endpoint.Processes where Processes.parent_process_name=iscsicpl.exe
+  `windows_shells` by Processes.dest Processes.user Processes.parent_process_name Processes.process_name
+  Processes.process Processes.process_id Processes.parent_process_id
+  | `drop_dm_object_name(Processes)` 
+  | `security_content_ctime(firstTime)`
+  | `security_content_ctime(lastTime)`| `windows_dll_search_order_hijacking_with_iscsicpl_filter`'
+how_to_implement: To successfully implement this search you need to be ingesting information on process that include the name of the process responsible for the changes from your endpoints into the `Endpoint` datamodel in the `Processes` node. In addition, confirm the latest CIM App 4.20 or higher is installed and the latest TA for the endpoint product.
+known_false_positives: False positives may be present, filtering may be required. Remove the Windows Shells macro to determine if other utilities are using iscsicpl.exe.
+references:
+  - https://github.com/hackerhouse-opensource/iscsicpl_bypassUAC
+  - https://github.com/422926799/csplugin/tree/master/bypassUAC
+tags:
+  analytic_story:
+  - Windows Defense Evasion Tactics
+  - Living Off The Land
+  asset_type: Endpoint
+  cis20:
+  - CIS 3
+  - CIS 5
+  - CIS 16
+  confidence: 80
+  context:
+  - Source:Endpoint
+  - Stage:Persistence
+  - Stage:Privilege Escalation
+  - Stage:Defense Evasion
+  - Scope:Inbound
+  dataset:
+  - https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1574.001/iscsicpl/iscsi-windows-sysmon.log
+  impact: 80
+  kill_chain_phases:
+  - Exploitation
+  message: An instance of $parent_process_name$ spawning $process_name$ was identified on endpoint $dest$ by user $user$ attempting to elevate access.
+  mitre_attack_id:
+  - T1574.001
+  nist:
+  - DE.CM
+  observable:
+  - name: user
+    type: User
+    role:
+    - Victim
+  - name: dest
+    type: Hostname
+    role:
+    - Victim
+  - name: parent_process_name
+    type: Process
+    role:
+    - Parent Process
+  - name: process_name
+    type: Process
+    role:
+    - Child Process
+  product:
+  - Splunk Enterprise
+  - Splunk Enterprise Security
+  - Splunk Cloud
+  required_fields:
+  - _time
+  - Processes.dest
+  - Processes.user
+  - Processes.parent_process_name #parent process name
+  - Processes.parent_process #parent cmdline
+  - Processes.original_file_name
+  - Processes.process_name #process name
+  - Processes.process #process cmdline
+  - Processes.process_id
+  - Processes.parent_process_path
+  - Processes.process_path
+  - Processes.parent_process_id
+  risk_score: 64
+  security_domain: endpoint

tests/endpoint/windows_dll_search_order_hijacking_with_iscsicpl.test.yml

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+name: Windows DLL Search Order Hijacking with iscsicpl Unit Test
+tests:
+- name: Windows DLL Search Order Hijacking with iscsicpl
+  file: endpoint/windows_dll_search_order_hijacking_with_iscsicpl.yml
+  pass_condition: '| stats count | where count > 0'
+  earliest_time: -24h
+  latest_time: now
+  attack_data:
+  - file_name: iscsi-windows-sysmon.log
+    data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1574.001/iscsicpl/iscsi-windows-sysmon.log
+    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
+    sourcetype: xmlwineventlog
+    update_timestamp: true