Emotet Office (OLE) / .DOCX malware analysis — malicious · cff0307e84e8f6c3

MALICIOUS

Office (OLE) / .DOCX

166.8 KB Created: 2021-01-05 17:50:00 Authoring application: Microsoft Office Word

MD5: 2a5ef77a7027e22e62c8937fb31016ca SHA-1: 79aeadbb6d58a288b964faafd0e75e6dd04d95d3 SHA-256: cff0307e84e8f6c3c45d3ac88aee9f8761a6f7a271dc07e5c6b1a2b4012b654a

242 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.EmotetRed02224-9938637-0' directly attributes this to the Emotet family, known for its downloader capabilities.

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` `4ad47f06387c2fe26b40af7c5c3febabd490580f16728c81acf291150b2fb0bb`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	10757 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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