Detectionhightest
Shell32 DLL Execution in Suspicious Directory
Detects shell32.dll executing a DLL in a suspicious directory
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Christian Burkard (Nextron Systems)Created Wed Nov 24Updated Thu Feb 0932b96012-7892-429e-b26c-ac2bf46066ffwindows
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic2 selectors
detection:
selection_img:
- Image|endswith: '\rundll32.exe'
- OriginalFileName: 'RUNDLL32.EXE'
selection_cli:
CommandLine|contains|all:
- 'shell32.dll'
- 'Control_RunDLL'
CommandLine|contains:
- '%AppData%'
- '%LocalAppData%'
- '%Temp%'
- '%tmp%'
- '\AppData\'
- '\Temp\'
- '\Users\Public\'
condition: all of selection_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Sub-techniques
Rule Metadata
Rule ID
32b96012-7892-429e-b26c-ac2bf46066ff
Status
test
Level
high
Type
Detection
Created
Wed Nov 24
Modified
Thu Feb 09
Path
rules/windows/process_creation/proc_creation_win_rundll32_shell32_susp_execution.yml
Raw Tags
attack.defense-evasionattack.executionattack.t1218.011