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

Static analysis result for SHA-256 0258529b89cb288a…

MALICIOUS

Office (OLE) / .DOCX

193.4 KB Created: 2020-09-18 12:16:00 Authoring application: Microsoft Office Word
MD5: e308c64fa8c3d4a5ce2adfa9b3e4115b SHA-1: b7dc0314cc53c69f4e8b57601ae4d16c7214ef95 SHA-256: 0258529b89cb288a228b0791ffc721de998c886e2622408ef37389d0796cb038
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. This macro utilizes CreateObject and appears to be designed to download and execute a secondary payload, as indicated by the ClamAV detection and the presence of VBA p-code auto-execution. The obfuscated nature of the script and the lack of clear URLs suggest a downloader functionality.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9763532-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9763532-0
  • 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
ba8241e4388725ade491e6e42da3e5f9cf169555b4f6e61ff9f624691af3445f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20213 bytes

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