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

Static analysis result for SHA-256 5c8826f1210fa853…

MALICIOUS

Office (OLE) / .DOCX

194.4 KB Created: 2020-09-18 21:15:00 Authoring application: Microsoft Office Word
MD5: d21ae5f00439d5ad3f263a3965a0e1ee SHA-1: 9275fb5108d4eeba521465cbae7164d3d77749e7 SHA-256: 5c8826f1210fa85335233abd36c1a1139d5689142c5842c0da0c688f104c6410
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The file is a malicious Office document containing VBA macros. The 'Document_Open' macro is present and uses 'CreateObject', indicating an attempt to execute code. ClamAV identified this as a downloader, suggesting it fetches additional malicious content. The VBA code is heavily obfuscated, but the presence of the Document_Open auto-execution and the CreateObject call strongly suggest the intent to download and execute a second-stage payload.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9763611-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9763611-0
  • 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
27aa07f405fa9b3280133cc26ba8fa4c11df7235c7ef1a37f33a0286291c2144		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19156 bytes

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