Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 b3d3fcdf503c85dd…

MALICIOUS

Office (OLE) / .DOCX

172.8 KB Created: 2020-10-02 08:05:00 Authoring application: Microsoft Office Word
MD5: 348a2df1899dd996500763188566dfec SHA-1: b5ff3d5a31ee08ffbd292498184f6bd9cf4c7bf0 SHA-256: b3d3fcdf503c85dda39b8b5bf8f23e026b4d3c0a4aa046fd592bbadf4108c05a
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The critical ClamAV detection 'Doc.Downloader.EmotetRed02224-9938637-0' strongly suggests Emotet. The presence of a 'Document_Open' macro, which uses 'CreateObject' and exhibits VBA p-code auto-execution, indicates the macro is designed to run automatically upon opening the document. This macro likely downloads and executes a second-stage payload, a common Emotet delivery technique. The obfuscated document body content is consistent with this type of malicious document.

Heuristics 7

  • 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.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
7051a023ff8c92545e9437031d326fa9393a821a4be28f0566a57a8f3610dd93		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10600 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 53 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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