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

Static analysis result for SHA-256 6b7e79a2b7a0aad7…

MALICIOUS

Office (OLE) / .DOCX

155.7 KB Created: 2020-09-23 17:49:00 Authoring application: Microsoft Office Word
MD5: 3eef62e75ae00df61ef7595f461489c5 SHA-1: d7404a4802cc707c7d2af6c5160a24f9d7925ba9 SHA-256: 6b7e79a2b7a0aad75d55233021d8fe91d143c3ad55f60871cbbf0f8be2b3e026
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is a Microsoft Office document containing VBA macros, specifically triggering a Document_Open auto-execution macro. The presence of CreateObject calls and the ClamAV detection as a downloader strongly suggest that the macro is intended to download and execute a second-stage payload. The obfuscated nature of the script prevents a more detailed analysis of its specific actions.

Heuristics 6

  • ClamAV: Doc.Downloader.Mryv-9765643-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Mryv-9765643-0
  • 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
3fdc5dc9fa6dbe05ddbb5394ffbf1a5da353d311eafd75c86ddc522f2b658b58		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19358 bytes

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