> For the complete documentation index, see [llms.txt](https://manuals.blusapphire.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://manuals.blusapphire.io/blugenie/artifacts/tactical-artifacts-by-category/eventlog-query/query-for-unusual-instances-of-rundll32.exe-making-outbound-network-connections-using-sysmon-data.md).

# Query for Unusual Instances of rundll32.exe making outbound network connections using SysMon Data

```
#####aid_begin
#description: identifies unusual instances of rundll32.exe making outbound network connections using sysmon
#id: aid2201251645
#processtype: query
#category: network
#sourcelink: <na>
#tacticidlist: <na>
#techniqueidlist: <na>
#compatibleos: |-
#  windows 7
#  windows 8.*
#  windows 10
#  windows 11
#  windows server 2008 r2
#  windows server 2012
#  windows server 2012 r2
#  windows server 2016
#  windows server 2019
#compatibleengine: |-
#  powershell 2
#  powershell 3
#  powershell 4
#  powershell 5.*
#  powershell 7.*
#bgcommandlist: |-
#  format-bgevent
#  1) get the sysmon envent log where id 3
#  2) query to get the identifies unusual instances of rundll32.exe making outbound network connections using sysmon.
#notes: |- 
#  adversaries may abuse rundll32.exe to proxy execution of malicious code. this may indicate adversarial command and control activity.
#   o event source: sysmon
#   o schema used: "sysmon.schema"
#   o event dataset: "microsoft-windows-sysmon/operational"
#   o eventid's: '3'
#####aid_end
commands:
- Format-BGEvent -Event "Microsoft-Windows-Sysmon/operational" -PropsOnly -MaxEvents 5000 -ID '3' -Schema "$('{0}\Blubin\Modules\BluGenie\Configs\Schema\Sysmon_1.Schema' -f $ScriptDirectory)" -EQLQuery "generic where true" -EQLQuery "generic where true"
- Format-BGEvent -UseInputFile "Last:" -EQLQuery "generic where EventId in (3) and process_name == '*\\rundll32.exe' and not cidrMatch(destination_ip, '10.0.0.0/8', '127.0.0.0/8', '169.254.0.0/16', '172.16.0.0/12', '192.0.0.0/24', '192.0.0.0/29', '192.0.0.8/32', '192.0.0.9/32', '192.0.0.10/32', '192.0.0.170/32', '192.0.0.171/32', '192.0.2.0/24', '192.31.196.0/24', '192.52.193.0/24', '192.168.0.0/16', '192.88.99.0/24', '224.0.0.0/4', '100.64.0.0/10', '192.175.48.0/24', '198.18.0.0/15', '198.51.100.0/24', '203.0.113.0/24', '240.0.0.0/4')"
```


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://manuals.blusapphire.io/blugenie/artifacts/tactical-artifacts-by-category/eventlog-query/query-for-unusual-instances-of-rundll32.exe-making-outbound-network-connections-using-sysmon-data.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.