Emotet Office (OLE) / .DOCX malware analysis — malicious · b848f3f6b03c3fc4

MALICIOUS

Office (OLE) / .DOCX

205.6 KB Created: 2020-12-22 12:31:00 Authoring application: Microsoft Office Word

MD5: 9cbe612d23c9b4fcefa3215c79e9778f SHA-1: bff7488155cfe70119e3e541ec1a490e7e0c5c1a SHA-256: b848f3f6b03c3fc4c1b4f73e89c9a40e0bb62d31882460571592b614cbf836a6

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The critical ClamAV detection and high-severity heuristics for VBA macros, specifically the Document_Open auto-execution and CreateObject calls, strongly indicate a malicious downloader. The presence of a VBA macro named 'macros.bas' further supports this. The ClamAV signature 'Doc.Downloader.Emotet-10024800-0' directly attributes this to the Emotet family, which is known for its downloader capabilities. The obfuscated document body text does not provide further context on the lure, but the technical indicators are clear.

Heuristics 7

ClamAV: Doc.Downloader.Emotet-10024800-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-10024800-0
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.

Filename	Kind	Source	Size
`macros.bas` `b223e36ca03f3aef1de34ece9213428b8c399a8d27f7650232938837efe41a69`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	16333 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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