Emotet Office (OLE) / .DOCX malware analysis — malicious · d3a0d1bebe19f71b

MALICIOUS

Office (OLE) / .DOCX

202.8 KB Created: 2020-09-17 11:10:00 Authoring application: Microsoft Office Word

MD5: 21118811c9ec4ada25b0464c816690bd SHA-1: 426983a7f64afc27b1825e254913c9b56ad85fff SHA-256: d3a0d1bebe19f71b0659a0b872335d15b031adb5fb6b2d554d21b4ffa2566f84

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The critical ClamAV detection and high-severity heuristics for VBA macros, specifically the Document_Open auto-execution and CreateObject calls, strongly indicate a malicious dropper. The presence of a VBA macro in macros.bas, combined with the ClamAV signature, points towards the Emotet family. The Document_Open macro is designed to execute VBA code upon opening the document, which is likely responsible for downloading and executing a second-stage payload.

Heuristics 7

ClamAV: Doc.Dropper.EmotetWinMob0920-9636503-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Dropper.EmotetWinMob0920-9636503-0
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` `f75cb34853fc7667030208f5884171d2f5ac18f4d450c41594c4566fd908b9ea`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	20610 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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