# Query for unusual instances of rundll32.exe via the Event Log

```
#####aid_begin
#description:  identifies unusual instances of rundll32.exe making suspicious file creations and executions
#id: aid2201252011
#processtype: query
#category: eventlog
#link: <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 event log where id 1, 11
#   2) query unusual instances of suspicious file creation and execution using rundll32.exe 
#notes:  |- 
#  identifies when a script interpreter or signed binary is launched via a non-standard working directory. an attacker may use this technique to evade defenses.
#   o event source: sysmon
#   o schema used: "c:\blugenie\bin\x64\blubin\modules\blugenie\configs\schema\sysmon.schema"
#   o event dataset: "microsoft-windows-sysmon/operational"
#   o eventid's: '1, 11'
#####aid_end
commands:
- Format-BGEvent -Event "Microsoft-Windows-Sysmon/operational" -PropsOnly -MaxEvents 50 -ID '1,11' -Schema "$('{0}\Blubin\Modules\BluGenie\Configs\Schema\Sysmon_1.Schema' -f $ScriptDirectory)" -EQLQuery "generic where true"
- Format-BGEvent -UseInputFile "Last:" -EQLQuery "generic where EventId in (1,11) and (process_name == '*\\rundll32.exe' and wildcard(process_command_line, '*\\Users\\*\\AppData\\Roaming\\*', '*\\Users\\*\\Public\\*', '*\\Users\\*\\AppData\\Local\\Temp\\*', '*\\ProgramData\\*', '*\\Windows\\temp\\*', '*\\Windows\\system32\\microsoft\\crypto\\rsa\\machinekeys\\*', '*\\Windows\\system32\\tasks_migrated\\microsoft\\windows\\pla\\system\\*', '*\\Windows\\syswow64\\tasks\\microsoft\\windows\\pla\\system\\*', '*\\Windows\\debug\\wia\\*', '*\\Windows\\system32\\tasks\\*', '*\\Windows\\syswow64\\tasks\\*', '*\\Windows\\tasks\\*',  '*\\Windows\\registration\\crmlog\\*', '*\\Windows\\system32\\com\\dmp\\*', '*\\Windows\\system32\fxstmp\\*', '*\\Windows\\system32\\spool\\drivers\\color\\*', '*\\Windows\\system32\\spool\\printers\\*', '*\\Windows\\system32\\spool\\servers\\*', '*\\Windows\\syswow64\\com\\dmp\\*', '*\\Windows\\syswow64\\fxstmp\\*', '*\\Windows\\tracing\\*')) or (process_name == '*\\rundll32.exe' and wildcard(file_path, '*\\Users\\*\\AppData\\Roaming\\*', '*\\Users\\*\\Public\\*', '*\\Users\\*\\AppData\\Local\\Temp\\*', '*\\ProgramData\\*', '*\\Windows\\temp\\*', '*\\Windows\\system32\\microsoft\\crypto\\rsa\\machinekeys\\*', '*\\Windows\\system32\\tasks_migrated\\microsoft\\windows\\pla\\system\\*', '*\\Windows\\syswow64\\tasks\\microsoft\\windows\\pla\\system\\*', '*\\Windows\\debug\\wia\\*', '*\\Windows\\system32\\tasks\\*', '*\\Windows\\syswow64\\tasks\\*', '*\\Windows\\tasks\\*',  '*\\Windows\\registration\\crmlog\\*', '*\\Windows\\system32\\com\\dmp\\*', '*\\Windows\\system32\fxstmp\\*', '*\\Windows\\system32\\spool\\drivers\\color\\*', '*\\Windows\\system32\\spool\\printers\\*', '*\\Windows\\system32\\spool\\servers\\*', '*\\Windows\\syswow64\\com\\dmp\\*', '*\\Windows\\syswow64\\fxstmp\\*', '*\\Windows\\tracing\\*'))"
```


---

# Agent Instructions: 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:

```
GET https://manuals.blusapphire.io/blugenie/artifacts/tactical-artifacts-by-category/eventlog-query/query-for-unusual-instances-of-rundll32.exe-via-the-event-log.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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.