Emotet — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 3c14d02da3d93919…

MALICIOUS

Office (OLE) / .DOC

171.2 KB Created: 2020-07-27 08:46:00 Authoring application: Microsoft Office Word
MD5: 4394525cb5efa95a310804b4c6d6eaa1 SHA-1: e4a473f505cc9c2107bc41813510571330dfa385 SHA-256: 3c14d02da3d93919bef3e31c1a29f4d28b02397c5d420fa76abd3f8307d9b321
300 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains a critical heuristic firing for a VBA UserForm hidden-property command stager, indicating it's designed to execute code automatically upon opening. The presence of a Document_Open macro and CreateObject calls further supports this. ClamAV detection as 'Doc.Dropper.EmotetIOS-9402070-0' strongly suggests an Emotet family infection. The primary IOC is the extracted 'macros.bas' file, which likely contains the malicious VBA code.

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.
  • ClamAV: Doc.Dropper.EmotetIOS-9402070-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.EmotetIOS-9402070-0
  • 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
864f6cacde0a88f42b54b79ba356ff27c52858f437376448d98011ec15c1b87a		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3995 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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