Emotet Office (OLE) / .DOCX malware analysis — malicious · a03c9dc5727fee39

MALICIOUS

Office (OLE) / .DOCX

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

MD5: 6964a503a35b4c8d270289077aefe85a SHA-1: 9089976231ad9b02b896a4d0d2efb9e52f4ac465 SHA-256: a03c9dc5727fee3968f4d2d8352258cfc56840dd972680704075d574c12dad5e

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The file is identified as malicious by ClamAV with a signature indicating it is a downloader associated with Emotet. Heuristics confirm the presence of VBA macros, specifically a Document_Open auto-execution macro that uses CreateObject, indicating it's designed to run code when the document is opened. The extracted document body appears to be heavily obfuscated, but the presence of the Document_Open macro and the ClamAV detection strongly suggest the intent is to download and execute a second-stage payload.

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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