Emotet Office (OLE) / .DOCX malware analysis — malicious · 43052b17a8232a88

MALICIOUS

Office (OLE) / .DOCX

171.5 KB Created: 2020-07-29 19:35:00 Authoring application: Microsoft Office Word

MD5: b9bf5e7cc7f1ebb7d80526301d810d41 SHA-1: 70ca1c95f0362bdb750ca1d0c287f2e8c27b3f35 SHA-256: 43052b17a8232a884c8f00fb68762193f56fd3c6595418f34857d9dad5b2443f

300 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The sample was detected by ClamAV as Doc.Downloader.Emotet-9393304-1, indicating a known Emotet downloader. Critical heuristics indicate the use of a hidden UserForm as a command stager, which is a common Emotet technique for executing VBA code. This code likely downloads and executes a second-stage payload, consistent with Emotet's behavior.

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-9393304-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-9393304-1
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` `04b965414b08dbafca5b36b764d9b8481343fa10a7337e213dd31758a5adc2c7`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	5073 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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