Emotet Office (OLE) / .DOC malware analysis — malicious · 4e1a6be19c454c53

MALICIOUS

Office (OLE) / .DOC

181.5 KB Created: 2020-10-27 09:55:00 Authoring application: Microsoft Office Word

MD5: 73403d9b55ad932230a974aaf0f7769c SHA-1: f78d39a56fc6db939fd40aae8419480c8fc06188 SHA-256: 4e1a6be19c454c534eaeb15e13b8df6951cf670f84f77d55cb42829d498cc53a

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 VBA macros, specifically the Document_Open auto-execution and CreateObject calls, strongly indicate malicious intent. The presence of a VBA macro within the document, identified as 'macros.bas', further supports this. The ClamAV signature 'Doc.Downloader.Emotet-9784225-0' directly attributes this sample to the Emotet family, which is known for its downloader capabilities. The document body's obfuscated nature suggests it's not intended for human readability but rather to conceal the macro's execution.

Heuristics 7

ClamAV: Doc.Downloader.Emotet-9784225-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-9784225-0
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` `d266e0e433b4f1ca206b8db182ee793bd3229a389f65ad6b52e9aace0436fd0a`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	15938 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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