Emotet Office (OLE) / .DOCX malware analysis — malicious · 8fb54ec8a9d9e119

MALICIOUS

Office (OLE) / .DOCX

171.0 KB Created: 2020-10-21 13:56:00 Authoring application: Microsoft Office Word

MD5: c4a66bfe448de43445d8860d117ac94c SHA-1: e0496e2b51701d9e80f685863259bc3d84c58f88 SHA-256: 8fb54ec8a9d9e11931e0436c858e72e052585cafd56ca4060f09a65f85061220

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1059.001 PowerShell

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 ClamAV signature, points to the Emotet family. The macro is designed to execute automatically upon opening the document, likely to download and run a secondary payload.

Heuristics 7

ClamAV: Doc.Dropper.EmotetUpdate1020-9778523-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.EmotetUpdate1020-9778523-0
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` `113d36c64715b3a3694b52821b832bd3a24df7013a1eebeaaceb4571875cbc4c`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	23319 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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