Emotet — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 5fbcfe9f43f3e278…

MALICIOUS

Office (OLE) / .DOC

198.5 KB Created: 2020-10-21 13:40:00 Authoring application: Microsoft Office Word
MD5: 0d2750df15a6d6b099b3ed1c1bc6eef4 SHA-1: ec820707c260b43672f9d6cf30eea29ac5c2aa66 SHA-256: 5fbcfe9f43f3e278079486d851574045d6f8e040d1bca64ffc77ad9d053fc572
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is a malicious Office document containing VBA macros, specifically a Document_Open macro that uses CreateObject to execute code. The ClamAV detection name 'Doc.Dropper.EmotetBlueUpdate1020' strongly suggests the Emotet family. The VBA macro code is heavily obfuscated but its structure and the presence of a Document_Open auto-execution routine indicate it's designed to download and execute a second-stage payload.

Heuristics 6

  • ClamAV: Doc.Dropper.EmotetiBlueUpdate1020-9780531-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.EmotetiBlueUpdate1020-9780531-0
  • 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
95eb3c5d035a5c49033717199bc50764986e3b5ab99bba0bc56e259ec5a3061f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 23248 bytes

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