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

Static analysis result for SHA-256 72bb45f25da9afa4…

MALICIOUS

Office (OLE) / .DOCX

219.2 KB Created: 2020-10-28 16:03:00 Authoring application: Microsoft Office Word
MD5: 7cf7618cdadedb2f023ee7420c608172 SHA-1: 1187d6706a0c94724708a96bf88dc9d3c41a000d SHA-256: 72bb45f25da9afa46d5e326089675c0a79d3ffe30eade356cd8114e74b2e58e9
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The file is a Microsoft Office document containing a malicious VBA macro. The macro is designed to execute automatically upon opening, as indicated by the Document_Open heuristic. It uses CreateObject to likely download and execute a second-stage payload, a common technique for malware droppers. The obfuscated nature of the VBA code suggests an attempt to evade detection.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9785156-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9785156-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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
  • 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://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
432b4517275395423e4145d722d6a456d77df175cda38550f4e26528858e8adb		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18870 bytes

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