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

Static analysis result for SHA-256 5c7bfd1823b37a4f…

MALICIOUS

Office (OLE) / .DOCX

152.6 KB Created: 2020-09-24 05:47:00 Authoring application: Microsoft Office Word
MD5: b1a100492e25fff1f75e33bab745807d SHA-1: 897034985395f39f4a13ebd3c19e8353fb31b2bf SHA-256: 5c7bfd1823b37a4f48ff0166d60e88e0be88ae562cf87c6bf393597da4fd835b
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The file is a Microsoft Office document containing VBA macros, specifically triggering on Document_Open. The macros utilize CreateObject and appear to deobfuscate and execute code, as indicated by the 'P-CODE_AUTOEXEC_EXEC' heuristic. The ClamAV detection 'Doc.Trojan.Agent-9765752-0' further confirms its malicious nature. The embedded URL is benign, but the overall behavior suggests a downloader or initial stage of a more complex attack.

Heuristics 6

  • ClamAV: Doc.Trojan.Agent-9765752-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Agent-9765752-0
  • 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
b0798fb7450882311ba60b57e039433588cb794c6cc8a10f75d1de73c5c7973a		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19490 bytes

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