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

Static analysis result for SHA-256 5cbc632d9e8bdf2c…

MALICIOUS

Office (OLE) / .DOCX

158.9 KB Created: 2020-09-23 21:57:00 Authoring application: Microsoft Office Word
MD5: 68c1995ec536e76cb19615a7e100005c SHA-1: b649672a041b599eb598620e97f48658dd536806 SHA-256: 5cbc632d9e8bdf2c957c7d6864fab56e5106c110bf14838a440449dc0fd40926
202 Risk Score

Malware Insights

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

The file is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that utilizes CreateObject. This indicates an attempt to execute code upon opening. The ClamAV detection 'Doc.Downloader.Mryv-9765643-0' strongly suggests a downloader functionality. The VBA script appears to be heavily obfuscated, making it difficult to determine the exact payload or destination, but the overall pattern points to a downloader malware.

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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