Emotet Office (OLE) / .DOC malware analysis — malicious · c84475a32cb62be3

MALICIOUS

Office (OLE) / .DOC

266.2 KB Created: 2020-02-06 20:09:00 Authoring application: Microsoft Office Word

MD5: 213bd208ac8a5a16a1bb62f60a59b5dc SHA-1: 539796e28c2774c2240e0099281a43d000090810 SHA-256: c84475a32cb62be36159e2d8f635f358eb179688f619e0fa9307d11327721727

300 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The file contains VBA macros, specifically a Document_Open macro designed to execute automatically. Critical heuristics indicate a hidden UserForm command stager and a p-code auto-execution with CreateObject, strongly suggesting the macro's purpose is to download and execute a second-stage payload. ClamAV detection confirms this as Emotet. The embedded URL was confirmed benign and is likely a red herring or part of the document's benign structure.

Heuristics 8

VBA UserForm hidden-property command stager critical OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER

VBA auto-exec macro creates a COM object from a decoded variable and reconstructs command text through Split/Join and hidden UserForm properties such as ControlTipText, Tag, Pages, or HelpContextId. This is a high-confidence macro downloader/loader shape seen in the reviewed OLE set, but it is not an Office CVE exploit primitive.
ClamAV: Doc.Malware.Emotet-7581139-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Emotet-7581139-1
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` `8544fe8ebb367e878aea3cfe24ac290f80467136ee5ba40c0719c25d04f8ff58`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	12934 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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