Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 99de5b08c8027154…

MALICIOUS

Office (OLE) / .DOCX

202.8 KB Created: 2020-09-17 11:10:00 Authoring application: Microsoft Office Word
MD5: 99fff38b8adb1be7915f14f947312df0 SHA-1: 1e2703a28b332e7f15cc670272e815d7482adc1a SHA-256: 99de5b08c80271540dbc672e7af4161673700258914417bd7087cb843303a53b
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with the signature '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 uses 'CreateObject'. This suggests the macro is designed to execute arbitrary code, likely to download and run a second-stage payload. The presence of VBA macros and the 'Dropper' classification strongly point towards a delivery mechanism for further malware.

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
f75cb34853fc7667030208f5884171d2f5ac18f4d450c41594c4566fd908b9ea		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 20610 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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