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

Static analysis result for SHA-256 5b3069c3061e3941…

MALICIOUS

Office (OLE) / .DOCX

163.5 KB Created: 2020-10-20 08:13:00 Authoring application: Microsoft Office Word
MD5: b5f6f4de28d2515b88ca910ca9e98ab5 SHA-1: 25cbf223337b575bd9123171cd859657d41144ff SHA-256: 5b3069c3061e3941471dff62687a2a7ccbda231abe76b3f07b58f763abaa6d10
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1041 Exfiltration Over C2 Channel

The file contains VBA macros, specifically a Document_Open macro that utilizes CreateObject, indicating malicious intent. The macro code is heavily obfuscated, making it difficult to determine the exact payload, but it is designed to execute code and likely download a second-stage payload. The ClamAV detection further confirms its malicious nature. The presence of a Document_Open macro suggests it was likely delivered as a spearphishing attachment.

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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