Emotet Office (OLE) / .DOC malware analysis — malicious · da55d54edd3021eb

MALICIOUS

Office (OLE) / .DOC

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

MD5: 63d1fe91be7475f7d7b16d9c0f4d72e9 SHA-1: 7ca71caca4479e3ef2127350292d609ccbb7f0d9 SHA-256: da55d54edd3021ebaf41530e1ec8dd18fb5541bb09c3cc9d10c88e9da0351409

300 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file contains VBA macros, specifically a Document_Open macro designed to execute automatically. Critical heuristics indicate a hidden command stager using CreateObject and string manipulation, typical of Emotet's initial infection vector. The ClamAV detection explicitly names Emotet. The primary function appears to be downloading and executing a second-stage payload, as suggested by the auto-execution and CreateObject calls.

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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