Emotet Office (OLE) / .DOCX malware analysis — malicious · 1b1cb32d2f4a43f7

MALICIOUS

Office (OLE) / .DOCX

209.0 KB Created: 2020-12-22 21:50:00 Authoring application: Microsoft Office Word

MD5: 6f8bc0b15b9fe5b540f66110475a868d SHA-1: c8581a804d0c8af06b628c10411094ae342e5880 SHA-256: 1b1cb32d2f4a43f7bd1699dd46b55f8deed32e31065c9f13c69f2610b96d41c6

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer

The file is identified as malicious by ClamAV with a signature indicating it's a downloader associated with Emotet. Heuristics confirm the presence of VBA macros, specifically a Document_Open auto-execution macro that uses CreateObject. This indicates the script is designed to run automatically upon opening the document, likely to download and execute a secondary payload. The presence of the 'macros.bas' artifact further supports this. The document body content is heavily obfuscated and unreadable, providing no direct clues to the lure, but the technical indicators are strong.

Heuristics 7

ClamAV: Doc.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
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` `b559ca2a4b6431779fe74d7481a6f916cab3c2b891432c5ee8c97f5a35ecea25`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	15388 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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