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

Static analysis result for SHA-256 729cba2097ab2557…

MALICIOUS

Office (OLE) / .DOCX

157.4 KB Created: 2020-09-23 17:49:00 Authoring application: Microsoft Office Word
MD5: e9788c0fcc6b404ac643ef0863385a96 SHA-1: 4cea66353a997d0305d149d980b2ae4d5229808c SHA-256: 729cba2097ab255730f52b381ebd958f1161129256eaecbf528d95a592ea93ce
202 Risk Score

Malware Insights

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

The sample contains VBA macros, including a Document_Open auto-execution macro, which is a strong indicator of malicious intent. The ClamAV detection 'Doc.Downloader.Mryv-9765643-0' further supports this, suggesting the macro's purpose is to download and execute a secondary payload. The script's obfuscated nature and reliance on string concatenation for constructing commands prevents a more precise analysis of its execution flow.

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

Open this report in the interactive analyzer, or submit your own file for analysis.