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

Static analysis result for SHA-256 3e83247ebdd89c43…

MALICIOUS

Office (OLE) / .DOC

82.0 KB Created: 2021-08-16 09:50:00 Authoring application: Microsoft Office Word
MD5: 1e705371dbd3159eed61c3d272679f00 SHA-1: c1b434fef140b7b88ca0d80d0a1f4077f25e20f4 SHA-256: 3e83247ebdd89c43bd04229259af76b469d3fba37cbb1e4c44511ded6ba5b80a
182 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1204.002 Malicious File T1059.001 PowerShell

The sample is a malicious Microsoft Word document containing VBA macros. The 'autoopeN' macro is triggered upon opening, which then calls the 'mix' subroutine. The 'mix' subroutine reconstructs the string '.hT.wavDateMix' and writes the document's content to this file. Subsequently, the 'window_open' subroutine executes this file using 'scriptrunner -appvscript .hT.wavDateMix'. This indicates the document's primary purpose is to download and execute a second-stage payload.

Heuristics 6

  • ClamAV: Doc.Downloader.BluePaletteW09210-9893000-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.BluePaletteW09210-9893000-0
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen 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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/exif/1.0/
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
8dcf4d25b7022d11eac24c04cd913f6df9ed9aa0696da41b5c6c3ee67a29872f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 806 bytes

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