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

Static analysis result for SHA-256 e24d3044c9010db0…

MALICIOUS

Office (OLE) / .DOC

85.0 KB Created: 2021-08-26 09:50:00 Authoring application: Microsoft Office Word
MD5: c5334091df500f6c58b8e33faf32c354 SHA-1: 3537a8b346fcfa86a08aebc77c9a2ef2d56a8f13 SHA-256: e24d3044c9010db0037e5bebd8d23b6cf4f566b712d641c24a855a405164a98d
182 Risk Score

Malware Insights

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

The sample is a malicious OLE document containing VBA macros, specifically an AutoOpen macro. The script reconstructs a file path '.HTA' and writes the document's content (minus 'fp4a') to this file, then executes it using WshShell.run. This indicates a downloader or dropper functionality, aiming to execute a second-stage payload. The 'SE_ENABLE_LURE' heuristic further supports that the document is designed to trick users into enabling macros.

Heuristics 6

  • ClamAV: Doc.Downloader.BlueOffice08210-9889818-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.BlueOffice08210-9889818-0
  • 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
36f9dfb8fa278ffebe625caa66969652ad935d319d9bff5e497732e3e9087797		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 823 bytes

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