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

Static analysis result for SHA-256 199bb73155e048bf…

MALICIOUS

Office (OLE) / .DOCX

163.4 KB Created: 2020-10-20 08:13:00 Authoring application: Microsoft Office Word
MD5: ed8a1df002c2102149c4b259204ee022 SHA-1: fb62be5cc53c9cf25a7616ade80694f0f9e3baf8 SHA-256: 199bb73155e048bf82e90a8cafa04a663f3b25fb787146c791582b3feea0cf3a
202 Risk Score

Malware Insights

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

The sample is a malicious Office document containing a VBA macro that executes upon opening. The macro is heavily obfuscated but the presence of `CreateObject` and `Document_open` heuristics, along with the ClamAV detection, strongly suggests it's designed to download and execute a secondary payload. The obfuscated nature of the VBA code prevents a more detailed analysis of its specific actions.

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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