Emotet — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 82e92d510859b29c…

MALICIOUS

Office (OLE) / .DOC

112.1 KB Created: 2021-01-05 14:37:00 Authoring application: Microsoft Office Word
MD5: 66d78e2b8178b341db514213ae161b51 SHA-1: 79200c539f1a55c1c7ed2a7ad0e8cba72901e521 SHA-256: 82e92d510859b29c43413bc9f931a3746384e96783916811dbbdaf6cf5122c13
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample contains a heavily obfuscated VBA macro that executes upon opening the document. This macro utilizes CreateObject to interact with the FileSystemObject, attempting to create files with specific names and content in arbitrary locations on the local disk. The ClamAV signature 'Doc.Dropper.Emotet3steps0121-9819166-0' strongly suggests an Emotet family infection, which commonly uses such techniques to download and execute further stages.

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.Dropper.Emotet3steps0121-9819166-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Emotet3steps0121-9819166-0
  • 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
e3222be9414b39f5be6e1613a8647252445fb90752443b22009f6c4aef5321c5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10745 bytes

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