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

Static analysis result for SHA-256 74e13fc7a5f9b1cf…

MALICIOUS

Office (OLE) / .DOCX

167.0 KB Created: 2021-01-05 17:50:00 Authoring application: Microsoft Office Word
MD5: 4f75ff6b33e062cf7087bf1b185545ed SHA-1: 6d18db88e9be927012adff67e4bdce7c7b7ebf5f SHA-256: 74e13fc7a5f9b1cf0480e925f0e2274991fef4b53dd6ab413f42a006599edb97
262 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample contains a VBA macro that is obfuscated and automatically executes upon opening the document. This macro uses CreateObject to interact with the file system, creating files with suspicious names and paths such as 'ullgtlIxh:\oVXxqGIDB\sBFJHmWJ.ByrvyNXI' and 'LVZutLGhJ:\aOIhnRAF\CbWlODM.ssogG'. This behavior strongly suggests the macro is designed to download and execute a second-stage payload, consistent with Emotet downloader activity.

Heuristics 7

  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • ClamAV: Doc.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
  • 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
4ad47f06387c2fe26b40af7c5c3febabd490580f16728c81acf291150b2fb0bb		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10757 bytes

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