Emotet Office (OLE) / .DOCX malware analysis — malicious · b28f83f98b1fea60

MALICIOUS

Office (OLE) / .DOCX

230.1 KB Created: 2020-08-14 13:39:00 Authoring application: Microsoft Office Word

MD5: 0df1e14e1915d068da801e9bfb6a1009 SHA-1: 76c2e56acc5a6cbe5bff7a2acf2036612b7dc6fa SHA-256: b28f83f98b1fea60e81d904a7b81ee6aa553618021c77d800d5cfd79354842dd

300 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1059.001 PowerShell

The file contains a critical heuristic firing for a VBA UserForm hidden-property command stager, indicating it's designed to execute code. This is further supported by a critical ClamAV detection identifying it as 'Doc.Downloader.Emotet-9321492-0'. The presence of VBA macros and the specific stager technique strongly suggest a downloader functionality, likely Emotet, aiming to fetch and execute additional malicious payloads.

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.Downloader.Emotet-9321492-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-9321492-0
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` `865c37ae518b467a18f7f7cfd8ac4fb8e2c74b2d36657a71cf7fdd09ff330211`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	8121 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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