splunk_escuAnomaly

Windows Remote Image Load

The following analytic detects image load events where a process loads a file from a remote share path. This activity is significant because remote DLL or image loading can be abused for execution, defense evasion, or lateral movement while leaving the payload hosted on another system. If confirmed malicious, an attacker may be loading code into a local process from attacker-controlled infrastructure.

Detection Query

`sysmon`
EventID=7
ImageLoaded="\\\\*"
| fillnull
| stats count min(_time) as firstTime
              max(_time) as lastTime
  by Computer ImageLoaded EventID dest loaded_file loaded_file_path process_exec
     process_guid process_hash process_id process_name process_path
     service_dll_signature_exists service_dll_signature_verified signature_id user_id
     vendor_product

| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `windows_remote_image_load_filter`

Author

Raven Tait, Splunk

Data Sources

Sysmon EventID 7

References

Raw Content

name: Windows Remote Image Load
id: 041aaae4-03de-465c-b9cb-9ed0d1e10454
version: 2
creation_date: '2026-05-05'
modification_date: '2026-05-13'
author: Raven Tait, Splunk
status: production
type: Anomaly
description: |-
    The following analytic detects image load events where a process loads a file from a remote share path.
    This activity is significant because remote DLL or image loading can be abused for execution, defense evasion, or lateral movement while leaving the payload hosted on another system.
    If confirmed malicious, an attacker may be loading code into a local process from attacker-controlled infrastructure.
data_source:
    - Sysmon EventID 7
search: |-
    `sysmon`
    EventID=7
    ImageLoaded="\\\\*"
    | fillnull
    | stats count min(_time) as firstTime
                  max(_time) as lastTime
      by Computer ImageLoaded EventID dest loaded_file loaded_file_path process_exec
         process_guid process_hash process_id process_name process_path
         service_dll_signature_exists service_dll_signature_verified signature_id user_id
         vendor_product

    | `security_content_ctime(firstTime)`
    | `security_content_ctime(lastTime)`
    | `windows_remote_image_load_filter`
how_to_implement: The detection is based on data that originates from Endpoint Detection and Response (EDR) agents. These agents are designed to provide security-related telemetry from the endpoints where the agent is installed. To implement this search, you must ingest logs that contain the process GUID, process name, and parent process. Additionally, you must ingest complete command-line executions. These logs must be processed using the appropriate Splunk Technology Add-ons that are specific to the EDR product. The logs must also be mapped to the `Processes` node of the `Endpoint` data model. Use the Splunk Common Information Model (CIM) to normalize the field names and speed up the data modeling process.
known_false_positives: Legitimate software updates or remote imaging tools may load images from shared folders. Filter these detections for approved applications to reduce false positives.
references:
    - https://thehackernews.com/2024/08/microsoft-reveals-four-openvpn-flaws.html
    - https://www.microsoft.com/en-us/security/blog/2024/08/08/chained-for-attack-openvpn-vulnerabilities-discovered-leading-to-rce-and-lpe/
drilldown_searches:
    - earliest_offset: $info_min_time$
      latest_offset: $info_max_time$
      name: View the detection results for - "$user$" and "$dest$"
      search: '%original_detection_search% | search  user = "$user$" dest = "$dest$"'
    - name: View risk events for the last 7 days for - "$user$" and "$dest$"
      search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$user$", "$dest$") | 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: 7d
      latest_offset: "0"
intermediate_findings:
    entities:
        - field: dest
          type: system
          score: 20
          message: Potential remote image load activity observed on $dest$ via $ImageLoaded$.
analytic_story:
    - BlackByte Ransomware
    - Ransomware
    - LockBit Ransomware
asset_type: Endpoint
mitre_attack_id:
    - T1129
    - T1059
    - T1068
    - T1203
product:
    - Splunk Enterprise
    - Splunk Enterprise Security
    - Splunk Cloud
category: endpoint
security_domain: endpoint
tests:
    - name: True Positive Test
      attack_data:
        - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1129/snapattack/snapattack.log
          source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
          sourcetype: XmlWinEventLog
      test_type: unit