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

Static analysis result for SHA-256 623493fea7d7d2f6…

MALICIOUS

Office (OLE) / .DOCX

194.0 KB Created: 2020-10-22 20:29:00 Authoring application: Microsoft Office Word
MD5: 3a429285f1c06a7dbce336f51bbb72e7 SHA-1: 882cff2650a70699c182b261ac8ac353c0b57f89 SHA-256: 623493fea7d7d2f6e25e4e0c6d64d8bc684086cf8258e543f4a859b5e2080eab
202 Risk Score

Malware Insights

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

The sample is a DOCX file containing VBA macros, including a Document_Open auto-execution function. This function utilizes CreateObject, a common technique for downloading and executing additional payloads. The ClamAV detection as 'Doc.Downloader.Logan-9781905-0' further supports its role as a downloader. The VBA script itself is heavily obfuscated, making it difficult to determine the exact download URL or execution method.

Heuristics 6

  • ClamAV: Doc.Downloader.Logan-9781905-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Logan-9781905-0
  • 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
9ca879422c3203043eb02bf7332bfccca42d062c85606acaa47b14db718d1f57		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 22796 bytes

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