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

Static analysis result for SHA-256 13854c537bf403a1…

MALICIOUS

Office (OLE) / .DOCX

166.9 KB Created: 2020-09-24 06:41:00 Authoring application: Microsoft Office Word
MD5: d4bcf7a4d474da82fe69e094f5e7b1ff SHA-1: 254831b6eeec4ae6e496272ec7000e920adfd567 SHA-256: 13854c537bf403a1573b00bf40984ceb7da8aa4ffcf37a01bd4a57bb7c895da0
202 Risk Score

Malware Insights

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

The sample contains a VBA macro that automatically executes upon opening the document, as indicated by the Document_Open and CreateObject firings. The macro appears to be heavily obfuscated, but its intent is to likely download and execute a second-stage payload, as suggested by the ClamAV detection name 'Doc.Trojan.Agent'. The obfuscated document body content also hints at PowerShell execution.

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
5fc186fdbad9f31c9e64d83153a39dd477b4feadffd069d1417de0a82694326f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18827 bytes

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