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

Static analysis result for SHA-256 81931603dbb92f78…

MALICIOUS

Office (OLE) / .DOC

138.2 KB Created: 2020-09-28 21:18:00 Authoring application: Microsoft Office Word
MD5: b17ab279f6cc1ce3814ab9710c75cb23 SHA-1: cad3526283208665d583ebc2987d8a18403ca46f SHA-256: 81931603dbb92f78032227c21c6bcc3a3dfe98352c81d885a9c28d8fe622b957
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' heuristic. This macro uses 'CreateObject' and obfuscated code, suggesting it's designed to download and execute a secondary payload. The ClamAV detection and heuristic firings strongly indicate malicious intent, likely related to the Emotet family, although specific attribution is not possible from the provided evidence.

Heuristics 6

  • ClamAV: Doc.Malware.Emotet-9769000-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9769000-0
  • 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
af1832d1f4c91fc85d2c99e2822b1b7480a5e715a732a96dc374f162b3694b82		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6632 bytes

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