Malicious Office (OLE) / .PPT — malware analysis report

Static analysis result for SHA-256 0ae33c15b6bbdf00…

MALICIOUS

Office (OLE) / .PPT

755.0 KB Created: 2006-08-16 00:00:00 Authoring application: Microsoft Office PowerPoint
MD5: 45cd161dd9569a2be94843b423b99797 SHA-1: 54ac32e9ffba2ac7ee6b3ec039b9ad2efb722c7c SHA-256: 0ae33c15b6bbdf00bd6e9d1ea78ad026f6509242a757c4b96c752ca325be83de
220 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is a PowerPoint file containing obfuscated VBA macros. The Auto_Close macro is triggered upon closing the presentation, which then executes the obfuscated code. Critical heuristics indicate the use of Shell() calls and an obfuscated auto-exec loader, suggesting the VBA code is designed to download and execute a secondary payload. The specific payload and its destination are not discernible from the provided evidence.

Heuristics 5

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • Auto_Close macro high OLE_VBA_AUTOCLOSE
    Auto_Close macro
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
110915c8da6e87767796a698a2a08b3f9fb05f3e6667560a374337f08908f334		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 17283 bytes

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