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

Static analysis result for SHA-256 64e99051b9cb45a3…

MALICIOUS

Office (OLE) / .DOCX

164.7 KB Created: 2020-10-20 08:13:00 Authoring application: Microsoft Office Word
MD5: 8e8c9890ab3c1e4c3dd6c1f0b7fec3a4 SHA-1: db173d4b270d5377312fa3a8930eddf5e1a067e7 SHA-256: 64e99051b9cb45a384b9ed588cf3d5a8734c29ec44da0a99b0f38414652bef7c
202 Risk Score

Malware Insights

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

The sample contains VBA macros, specifically a Document_Open auto-execution macro, which is a common technique for initial execution. The VBA code is heavily obfuscated, but the presence of CreateObject and the overall structure strongly suggest it's designed to download and execute a secondary payload. ClamAV detection further confirms its malicious nature.

Heuristics 6

  • ClamAV: Doc.Trojan.Agent-9781037-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Agent-9781037-0
  • 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
8eb6ba0866f4c6c9ad4d97b0723246709e3ca63ed0491e35acc3191e90884d63		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 17541 bytes

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