Emotet Office (OLE) / .DOCX malware analysis — malicious · 3f1565ba4e9c93cf

MALICIOUS

Office (OLE) / .DOCX

186.5 KB Created: 2020-10-30 04:19:00 Authoring application: Microsoft Office Word

MD5: 1bba07ab9625330c8fe917b596641875 SHA-1: 1bbd1f6727fd480440ad6a1708c30f464cdfb594 SHA-256: 3f1565ba4e9c93cf71b5b5a3f3b16869e7c6a7d86a837a32db34f1f0105e3aaa

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The critical ClamAV detection and high-severity heuristics for VBA macros, specifically the Document_Open auto-execution and CreateObject calls, strongly indicate malicious intent. The presence of a large VBA macro (macros.bas) and the obfuscated document body content further support this. The primary function of the macro appears to be executing obfuscated VBA code, likely to download and run a second-stage payload, consistent with Emotet's typical behavior.

Heuristics 7

ClamAV: Doc.Malware.Emotet-9785300-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Emotet-9785300-0
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` `f7e154fbc1687723523f4f201e3a1591c84897657fe14056a01af3060d347cbe`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	17509 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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