Emotet Office (OLE) / .DOC malware analysis — malicious · 4c9c75f86a0e447c

MALICIOUS

Office (OLE) / .DOC

202.3 KB Created: 2020-12-21 12:42:00 Authoring application: Microsoft Office Word

MD5: 21d40e7037b9eb1f6b9280a1a13838d0 SHA-1: fc0350bbad0f541aae3023900a58a5a199485612 SHA-256: 4c9c75f86a0e447cc94e7d33a93d692f6971767a562d923ff8fccf97089c9d1e

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 malicious intent. The presence of a VBA macro in the 'macros.bas' file, combined with the 'OLE_VBA_PCODE_AUTOEXEC_EXEC' firing, suggests the macro is designed to execute automatically upon opening the document. The document body, though heavily obfuscated, contains strings that appear to be part of an error message, likely intended to mask the malicious activity of the macro, which is characteristic of Emotet's delivery methods.

Heuristics 7

ClamAV: Doc.Downloader.Emotet-10024800-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-10024800-0
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` `04d547494d5771205cd5534b18a3df40662108aef12728a2db1002693ce5a333`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	10294 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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