Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5b372067c1b29b0f…

MALICIOUS

Office (OLE)

157.6 KB Created: 2020-09-15 16:41:00 Authoring application: Microsoft Office Word
MD5: 53402bd7ea998b8a6c546a02518d0ef0 SHA-1: 300f3532eef78ee98853c73006fea1bc941c12cd SHA-256: 5b372067c1b29b0f14ad42676ac56326898cca6fbe9cb7d6cce703f1e5274c31
202 Risk Score

Malware Insights

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

The sample is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that utilizes CreateObject. This is a common technique for Emotet and similar malware families to download and execute further stages. The ClamAV detection ID 'Doc.Malware.Emotet-9762373-0' strongly suggests Emotet, although the macro code itself is heavily obfuscated and does not reveal specific URLs or commands.

Heuristics 6

  • ClamAV: Doc.Malware.Emotet-9762373-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9762373-0
  • 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
093df0d9d9ab28d17e10b8a3d4d0d2f7c34db272923888f5dfa322b516df3f65		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 22905 bytes

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