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

Static analysis result for SHA-256 6582b37fd7a1c9ef…

MALICIOUS

Office (OLE) / .DOCX

177.5 KB Created: 2020-09-18 20:16:00 Authoring application: Microsoft Office Word
MD5: ac14b18ce29e7ad3dbf4d0ea1f56bc46 SHA-1: fe9f6a5a1a758f9b669789c2a30c0121b4210d90 SHA-256: 6582b37fd7a1c9ef797e7f6db679df941000a9f14475cff833abe8d4b78e51f7
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 presence of CreateObject and p-code execution further indicates malicious intent. The ClamAV detection as 'Doc.Downloader.Mryu-9763604-0' strongly suggests the macro's purpose is to download and execute a secondary payload.

Heuristics 6

  • ClamAV: Doc.Downloader.Mryu-9763604-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Mryu-9763604-0
  • 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
4d4d8e1bba49d1cabf8de0e91ffc09553042ec2becc836c612f84309d5ca532f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19651 bytes

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