Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 0d90ca158eabbf8e…

MALICIOUS

Office (OLE) / .DOCX

156.7 KB Created: 2020-12-30 13:16:00 Authoring application: Microsoft Office Word
MD5: 550c29bf56c65e040291b80221d5dba7 SHA-1: 9fe3171d1ef4a4fcc1ad2c199b3a3aacd07e07ff SHA-256: 0d90ca158eabbf8ebd00e4093c2ccbd118833f31c3c6902dc7cc079b6ad27560
202 Risk Score

Malware Insights

Emotet · confidence 90%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The sample contains a VBA macro that is automatically executed upon opening the document, as indicated by the 'Document_Open' macro and 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristic. The macro utilizes 'CreateObject("Scripting.FileSystemObject")' and appears to be heavily obfuscated, with multiple truncated 'CreateTextFile' calls. This behavior is characteristic of Emotet, which often uses macro-enabled documents to download and execute further stages of malware.

Heuristics 6

  • 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
56a4885fb35696e61eb89c4193c6dbd09786b2db28cac633c3290a9c612d3393		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6670 bytes

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