Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 b8fcadf195f27ebb…

MALICIOUS

Office (OLE) / .DOCX

200.2 KB Created: 2020-09-17 11:51:00 Authoring application: Microsoft Office Word
MD5: 93ad4c68dade7517b21e7330146199a4 SHA-1: 0fa0dc2d3e86ef63026bd2b1a12e47bece3f7a99 SHA-256: b8fcadf195f27ebb514662ab9e70145f882d25dac95707073c43b5bd95feb757
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample was detected by ClamAV as 'Doc.Dropper.EmotetWinMob0920-9636503-0', indicating a known Emotet variant. High-severity heuristics confirm the presence of VBA macros, specifically a Document_Open auto-execution macro that utilizes CreateObject. This suggests the macro is designed to download and execute a second-stage payload. The presence of a long encoded blob within the extracted artifact further supports this dropper functionality.

Heuristics 7

  • ClamAV: Doc.Dropper.EmotetWinMob0920-9636503-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.EmotetWinMob0920-9636503-0
  • 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
c3286e68fa3d09f0094cde843da13ffd003c4769e3d53082fc234c009c46407c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19881 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 20 long base64-like blob(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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