Detection: Windows System Binary Proxy Execution MSIExec Remote Download
Description
The following analytic identifies msiexec.exe with http in the command-line. This procedure will utilize msiexec.exe to download a remote file and load it. During triage, review parallel processes and capture any artifacts on disk for review.
Annotations
No annotations available.
Implementation
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
False positives may be present, filter by destination or parent process as needed.
Associated Analytic Story
Risk Based Analytics (RBA)
| Risk Message | Risk Score | Impact | Confidence |
|---|---|---|---|
| An instance of spawning $process_name$ was identified on endpoint $dest_device_id$ by user $dest_user_id$ attempting to download a file. | 35 | 70 | 50 |
The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.
References
Version: 4