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

Static analysis result for SHA-256 786d28cd90e9a2bc…

MALICIOUS

Office (OLE) / .DOCX

173.3 KB Created: 2020-09-17 10:17:00 Authoring application: Microsoft Office Word
MD5: a3c4257327c4d41caf6af024f7e4dd66 SHA-1: 1f3850e7362a2f2284adcf9deebcd15b2461f74d SHA-256: 786d28cd90e9a2bc887c9cbf4225a7fed95a3e28b07ced5f8c932e1f1e673b66
202 Risk Score

Malware Insights

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

The sample is a malicious Office document containing VBA macros. The 'Document_open' macro is present and uses 'CreateObject', indicating an attempt to execute code. The ClamAV detection 'Doc.Downloader.Generic' strongly suggests the macro's purpose is to download and execute a second-stage payload. No specific family could be identified, but the behavior is consistent with a downloader.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9762674-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9762674-0
  • 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
9ba8ec3966e91d175acafd30ec3438df19c84a3d5c19c35fd5e40d1b639faa28		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20635 bytes

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