Emotet Office (OLE) / .DOCX malware analysis — malicious · 9f888165a94bb9d4

MALICIOUS

Office (OLE) / .DOCX

157.8 KB Created: 2020-10-20 04:30:00 Authoring application: Microsoft Office Word

MD5: a25c6f7d6f2e49752adbcf1f35aa469b SHA-1: dfc466024b045456778c0a50e65f6a2853b8bce7 SHA-256: 9f888165a94bb9d4b8592a3733d7e8d2e9c3e97652c666abc47d5e74f3649e74

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The critical ClamAV detection and high-severity heuristics for OLE_VBA_DOCOPEN, OLE_VBA_CREATEOBJ, and OLE_VBA_PCODE_AUTOEXEC_EXEC strongly indicate a malicious macro downloader. The Document_Open macro is designed to execute VBA code upon opening the document, which is typical for Emotet. The presence of the 'macros.bas' artifact further supports this. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its lure, but the macro execution is the primary threat.

Heuristics 7

ClamAV: Doc.Downloader.Emotet-9780400-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-9780400-0
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` `bec182db065394791f950a49edfb2bfa66cb6693b62758841681c782964c8b6d`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	15615 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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