Emotet Office (OLE) / .DOCX malware analysis — malicious · 3cb78e2ab36c72f8

MALICIOUS

Office (OLE) / .DOCX

197.6 KB Created: 2020-09-21 22:06:00 Authoring application: Microsoft Office Word

MD5: 5f356fac0d1ee4a4ab02923117d18f3c SHA-1: 23fb89eb4b1530c0161d06bb8de8360d755da97a SHA-256: 3cb78e2ab36c72f8292da6808ae005ee3aa17c694c35a65fea4a89d0f972d121

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The critical ClamAV detection and high-severity heuristics for OLE_VBA_MACROS, OLE_VBA_DOCOPEN, OLE_VBA_CREATEOBJ, OLE_VBA_GETOBJ, and OLE_VBA_PCODE_AUTOEXEC_EXEC strongly indicate malicious VBA code designed to run automatically upon opening the document. This code is characteristic of Emotet, which typically downloads and executes further payloads. The presence of a VBA macro named 'macros.bas' further supports this. The document body is heavily corrupted and unreadable, providing no direct clues to the lure.

Heuristics 8

ClamAV: Doc.Malware.Emotet-9765425-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Emotet-9765425-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
GetObject call high OLE_VBA_GETOBJ

GetObject 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` `3f69d910c7ab65b68002c6115856f94d0a2fe7883066824f7d890ec0735d30db`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	19084 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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