Emotet — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 6c9abcc36eabca22…

MALICIOUS

Office (OLE) / .DOC

202.9 KB Created: 2020-02-07 06:57:00 Authoring application: Microsoft Office Word
MD5: 99fae99a021d5ef85291293f89c34f9a SHA-1: 4167167b821b2ac0718c68cfb6482bc58bca9d41 SHA-256: 6c9abcc36eabca228547b6478a2da6026d8c1874f8ba68a6e321cf5a623eaab0
322 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains heavily obfuscated VBA macros with an auto-executing Document_Open subroutine. Critical heuristics indicate a hidden UserForm command stager and an obfuscated auto-exec loader that uses CreateObject and Shell/exec. This pattern is characteristic of Emotet downloaders, which are designed to download and execute further malicious payloads. The ClamAV detection also explicitly names Emotet.

Heuristics 8

  • VBA UserForm hidden-property command stager critical OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER
    VBA auto-exec macro creates a COM object from a decoded variable and reconstructs command text through Split/Join and hidden UserForm properties such as ControlTipText, Tag, Pages, or HelpContextId. This is a high-confidence macro downloader/loader shape seen in the reviewed OLE set, but it is not an Office CVE exploit primitive.
  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • ClamAV: Doc.Downloader.Emotet-7580152-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-7580152-0
  • 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
3f0ca153559580e9909ea957f633b30e0089d4d0e2f2fcb78b469f2ea6345901		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 18488 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.