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

Static analysis result for SHA-256 05ca394c62892a27…

MALICIOUS

Office (OLE) / .DOC

155.9 KB Created: 2020-09-22 12:54:00 Authoring application: Microsoft Office Word
MD5: 6ce2e81adfa1546dd557776ab018db35 SHA-1: 90d21c585f17de6fd76f5afc25bf7a107d30fc6c SHA-256: 05ca394c62892a271f895b7283739dfc2bfdb215e22861b35ea1cefb40446916
242 Risk Score

Malware Insights

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

The sample is a Microsoft Word document containing VBA macros, specifically a Document_Open macro that uses CreateObject and GetObject calls. This indicates an attempt to execute arbitrary code when the document is opened. The ClamAV heuristic also flags it as malicious. While the VBA code is obfuscated, the presence of these indicators strongly suggests a macro-based malware delivery mechanism, likely a downloader for a second-stage payload.

Heuristics 7

  • ClamAV: Doc.Malware.Ewtz-9765424-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Ewtz-9765424-0
  • 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
63bc7201a259a9f3eac24fc4f9990c61de6bed3eb66abffd8ef4af2ac67d9b62
vba-macro oletools.olevba.extract_macros (decoded VBA source) 15901 bytes