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

Static analysis result for SHA-256 831c896b4d6b4ad1…

MALICIOUS

Office (OLE) / .DOCX

174.9 KB Created: 2020-09-28 21:56:00 Authoring application: Microsoft Office Word
MD5: 92a7ffa4d83894d4ac30ac1c78715098 SHA-1: 2664b1bb8aa01897e3fbf25eb893ceca0123c7e8 SHA-256: 831c896b4d6b4ad14823c8d4b0aba608b79c4198ae79804ef5843c2915dd6881
202 Risk Score

Malware Insights

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

The sample contains VBA macros, including a Document_Open auto-execution macro, which is a common technique for initiating malicious actions upon opening the document. The script uses CreateObject and obfuscated string concatenation to likely download and execute a second-stage payload. The presence of a Document_Open macro and the use of CreateObject strongly suggest a macro-based malware delivery.

Heuristics 6

  • ClamAV: Doc.Malware.Generic-9769001-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Generic-9769001-0
  • 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
fe19635e7383e285d173bce1f5bbd9867258f7974e3830e10aecb187a337391c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6691 bytes

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