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

Static analysis result for SHA-256 5e8729bf1990b03b…

MALICIOUS

Office (OLE) / .DOC

199.5 KB Created: 2020-09-21 06:43:00 Authoring application: Microsoft Office Word
MD5: 94144587dc8b6eef128b3101ebb0a144 SHA-1: 3a6e90e9a2966d7f3af97fe86e91a1b7fb0e6da3 SHA-256: 5e8729bf1990b03b45fa7545f52dbc9b02cf2ea7178a0f33cac286d3566b4fba
242 Risk Score

Malware Insights

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

The sample is a Microsoft Office Word document with a high-confidence detection for VBA macros, specifically triggering on the Document_Open auto-execution macro. The presence of CreateObject and GetObject calls within the VBA code, combined with the ClamAV detection as a downloader, strongly suggests the macro's purpose is to fetch and execute a second-stage payload. No specific family could be identified, but the technique is consistent with macro-based malware delivery.

Heuristics 7

  • ClamAV: Doc.Downloader.Generic-9764468-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9764468-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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
7169cbbf5de322d778ca9a77dc58bcf8bb22a6f6d4bfec64dbfa06bc63509b99
vba-macro oletools.olevba.extract_macros (decoded VBA source) 19229 bytes