MacroMedia ShockWave Movie file Hint FILE START

Hunt Hypothesis

This rule identifies files containing the specific header signature of Macromedia Shockwave Director movies, which adversaries may use to deliver custom interactive payloads or obfuscated content that bypasses standard executable detection. Proactively hunting for these files in Azure Sentinel helps identify potentially legacy or non-standard media assets that could be leveraged for social engineering attacks or as staging containers for malicious scripts within the environment.

YARA Rule

rule MacroMedia_ShockWave_Movie_file_Hint_FILE_START: PEiD
{
    strings:
        $a = { 46 57 53 }
    condition:
        $a at pe.entry_point

}

Deployment Notes

This YARA rule can be deployed in the following contexts:

• Microsoft Defender for Endpoint — Custom indicators / advanced hunting
• Email Gateway — Attachment scanning
• File Share Monitoring — Periodic scanning of shared drives
• YARA CLI — Manual threat hunting on endpoints

This rule contains 1 string patterns in its detection logic.

• Source Rule

False Positive Guidance

• Legacy Flash Player Updates via Group Policy

  • Scenario: An IT administrator pushes an update to the legacy Adobe Flash Player (which often bundles Shockwave for Director content) to a fleet of Windows 7/8 machines using a custom Group Policy Object (GPO) or a deployment tool like SCCM. The update package extracts .swf or .swd (Shockwave Director) files to C:\Windows\System32\macromed\flash\ or similar vendor directories.
  • Filter/Exclusion: Exclude file paths under C:\Windows\System32\macromed\ or C:\Program Files\Adobe\ where the file extension is .swf, .swd, or .swx and the parent process is gpupdate.exe, ccmexec.exe, or msiexec.exe.

• Digital Signage and Kiosk Software

  • Scenario: A retail or corporate environment uses digital signage software (e.g., ScreenCloud, BrightSign, or custom kiosk apps) that loads Shockwave Director movies (.swd) for interactive content. These files are stored in the application’s local data folder, such as C:\ProgramData\SignageApp\content\ or C:\Users\Kiosk\AppData\Local\Signage\.
  • Filter/Exclusion: Exclude files located in C:\ProgramData\ or C:\Users\*AppData\Local\ subdirectories associated with known signage/kiosk vendor names (e.g., BrightSign, ScreenCloud, KioskApp) where the file extension is .swd or .swx.

• Legacy Educational or Training Modules

  • Scenario: An HR or Training department deploys older e-learning modules (e.g., from Articulate, Mac