Emotet Office (OLE) / .DOCX malware analysis — malicious · 8e99f5628dbd486e

MALICIOUS

Office (OLE) / .DOCX

202.8 KB Created: 2020-09-25 06:51:00 Authoring application: Microsoft Office Word

MD5: b10e6771ffba102752a10942d45b3afc SHA-1: ff15ec4a4cf39b9c9488f4c3ef7afd01ff382942 SHA-256: 8e99f5628dbd486efa0f0ef64fde215e35fc4f3ef1a045ddd87084b61b0676f2

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.005 Visual Basic 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 malicious intent. The presence of a VBA macro in the 'macros.bas' file, combined with the auto-execution of code, suggests the document is designed to run arbitrary commands. The document body, though heavily obfuscated, appears to contain encoded strings that likely form part of the PowerShell execution command. This points to a downloader or droppper functionality, consistent with Emotet's typical behavior of fetching and executing further stages.

Heuristics 7

ClamAV: Doc.Downloader.Emotet-9767804-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-9767804-1
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` `d802c65eb8f9df036cf46e9408744e30c5d95dae54b582b9f65ecb84ecb28fa8`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	25261 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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