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

Static analysis result for SHA-256 6bcabdc4f54569d1…

MALICIOUS

Office (OLE) / .DOCX

182.5 KB Created: 2020-10-22 07:03:00 Authoring application: Microsoft Office Word
MD5: 375697e8627059e9215dfad308c36373 SHA-1: fbea0052d50960bbf84b0af848dbbf1fbf2da881 SHA-256: 6bcabdc4f54569d1844998741b631e0a5cb9b9a83643ab9709e1b73aa721f86b
202 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with the signature 'Doc.Downloader.Logan-9781905-0'. Static analysis revealed the presence of VBA macros, specifically a Document_Open macro that utilizes CreateObject, indicating an attempt to execute code upon opening. The VBA script is heavily obfuscated, but its structure and the heuristic firings suggest it is designed to download and execute a second-stage payload. The document body is also obfuscated, preventing a clear understanding of its lure.

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
9eefe8f6ffcba14d0b71c6151e5387d8f5be4d801ca642a4cdf376fd6353abf9		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19020 bytes

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