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

Static analysis result for SHA-256 12aa0b900bd3625b…

MALICIOUS

Office (OLE) / .DOCX

206.8 KB Created: 2020-10-28 18:42:00 Authoring application: Microsoft Office Word
MD5: 0e37cec4dde9afadcd3bae16801aa736 SHA-1: 04c7dd302fc4b2fb8295bd56dbabd65efe62f79f SHA-256: 12aa0b900bd3625b019741d028ec231a4d10c73a0c34aec9fbd07ded33d1df4d
202 Risk Score

Malware Insights

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

The sample is a Microsoft Office document containing a high-severity VBA macro that executes upon opening (Document_Open). The macro utilizes CreateObject and obfuscated string manipulation, as evidenced by the '][ 1) jjkgS [] []w' pattern in the document body and the VBA script. This behavior is characteristic of a downloader, aiming to fetch and execute additional malicious content. The ClamAV detection 'Doc.Downloader.Generic-9785156-0' further supports this assessment.

Heuristics 6

  • ClamAV: Doc.Downloader.Generic-9785156-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-9785156-0
  • 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
e949db65d47346cd391eb9bc49c66a713688cfea31c7cb788a6d1dce1ea9efc6		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18584 bytes

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