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

Static analysis result for SHA-256 1783b7210fc11d49…

MALICIOUS

Office (OLE) / .DOCX

175.2 KB Created: 2020-09-17 20:07:00 Authoring application: Microsoft Office Word
MD5: 3d347e359b725a4caac1f1b62da6ddbd SHA-1: 02b179e587f7c93306218ae1e8ecf81c9c98d8be SHA-256: 1783b7210fc11d49c254e9d01607f32e9124044eebc736c34bf7d3fe06d7c0b0
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains a VBA macro that is automatically executed upon opening the document, as indicated by the Document_Open and CreateObject heuristic firings. The macro appears to be designed to download and execute a secondary payload, consistent with a downloader malware family. The ClamAV detection name further supports this assessment.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9763054-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9763054-0
  • 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
620e9eb15c32ed012e3e43742d6a5833fa906ea09e2bf7ca9f4f384d7210c8d6		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 21992 bytes

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