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Detectionmediumtest

Invoke-Obfuscation RUNDLL LAUNCHER - PowerShell

Detects Obfuscated Powershell via RUNDLL LAUNCHER

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Timur Zinniatullin, oscd.communityCreated Sun Oct 18Updated Tue Nov 29e6cb92b4-b470-4eb8-8a9d-d63e8583aae0windows
Log Source
WindowsPowerShell Script
ProductWindows← raw: windows
CategoryPowerShell Script← raw: ps_script

Definition

Requirements: Script Block Logging must be enabled

Detection Logic
Detection Logic1 selector
detection:
    selection_4104:
        ScriptBlockText|contains|all:
            - 'rundll32.exe'
            - 'shell32.dll'
            - 'shellexec_rundll'
            - 'powershell'
    condition: selection_4104
False Positives
Unknown

False positive likelihood has not been assessed. Additional context may be needed during triage.

References
1
Resolving title…
github.com
MITRE ATT&CK
Rule Metadata
Rule ID
e6cb92b4-b470-4eb8-8a9d-d63e8583aae0
Status
test
Level
medium
Type
Detection
Created
Sun Oct 18
Modified
Tue Nov 29
Author
Timur Zinniatullin, oscd.community
Path
rules/windows/powershell/powershell_script/posh_ps_invoke_obfuscation_via_rundll.yml
Raw Tags
attack.defense-evasionattack.t1027attack.executionattack.t1059.001
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