Emotet — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 5f78a5aca1e94c23…

MALICIOUS

Office (OLE) / .DOC

199.5 KB Created: 2020-10-21 21:54:00 Authoring application: Microsoft Office Word
MD5: b5eee7a7dd6e11ae908ef0f02c46de88 SHA-1: 66c7bc44cefd3427026abe7cc0d720683d8af208 SHA-256: 5f78a5aca1e94c23a7419344cd314f2a898f88bd3890d483a4d651524f6b5b6d
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a malicious Office document containing VBA macros, specifically triggering a Document_Open macro that uses CreateObject to execute code. ClamAV identifies it as 'Doc.Dropper.EmotetiBlueUpdate1020-9780531-0', a known Emotet variant. The VBA script is heavily obfuscated but its structure and the heuristic firings indicate it's designed to download and execute a secondary payload, consistent with Emotet's typical behavior.

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
6c391991df0deaab71158b56a42728fa6cc0fa0f9cdacd00457125ab6d1e3e9d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 23148 bytes

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