Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 5b6ad999ba9c1fc2…

MALICIOUS

Office (OLE)

165.2 KB Created: 2020-09-15 19:31:00 Authoring application: Microsoft Office Word
MD5: 81ef6652f3f146df64ede28e7b74ac32 SHA-1: daf357c76eaffa9150c5fe4f4b0e45f5e938b9e3 SHA-256: 5b6ad999ba9c1fc2c8a7c9405f7e52131bde9eafabb19f737c031e3b6206d4b4
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is a malicious Word document containing VBA macros, specifically a Document_Open macro that uses CreateObject to execute code. ClamAV identifies it as Doc.Downloader.Emotet-9761754-0. The VBA script appears to be obfuscated but its structure and the presence of a Document_Open auto-execution routine strongly suggest it is designed to download and execute a secondary payload, a common tactic for Emotet.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9761754-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9761754-0
  • 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
75714e73d3e8750b3760209a7997fccc8b6d96f31b59fa1d20ad2b0ef4583864		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 25430 bytes

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