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

Static analysis result for SHA-256 7c7c3627f0d6de0d…

MALICIOUS

Office (OLE) / .DOCX

159.2 KB Created: 2020-09-23 21:57:00 Authoring application: Microsoft Office Word
MD5: bc08da3571831919b27fd99c38b810ba SHA-1: ba3d3966cbfa75ebf026cef9d289d6175b396f0d SHA-256: 7c7c3627f0d6de0dacbaf735a2e34a8dc5d7397c9a7fd91b3831446a55667642
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, indicated by the 'Document_open' and 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristics. This macro is designed to create objects and likely download a secondary payload, as suggested by the 'OLE_VBA_CREATEOBJ' firing and the ClamAV detection 'Doc.Downloader.Mryv-9765643-0'. The obfuscated nature of the script prevents a more detailed analysis of its exact actions or the specific URL it may contact.

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
d7dd2a73d7d39dc729b85cfde71706f8b2534ea5cd633d43e9c623fb8097a814		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20294 bytes

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