Emotet Office (OLE) malware analysis — malicious · e4fef3fac02d6446

MALICIOUS

Office (OLE)

152.2 KB Created: 2020-09-14 20:00:00 Authoring application: Microsoft Office Word

MD5: d68e47119a165ad0b0fad84edf89f512 SHA-1: 5ab57a057e72ba72dac23f5233138842ce4d0a7c SHA-256: e4fef3fac02d6446ba2e8e83cb1b661aeca814d908e8b1c256a138f350f2d57a

300 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The file is identified as malicious by ClamAV and exhibits multiple high-severity heuristics indicating a macro-based attack. Specifically, the 'OLE_USERFORM_OBFUSCATED_POWERSHELL' heuristic points to a PowerShell stager embedded within a UserForm. The 'Document_Open' macro and 'CreateObject' call further confirm the execution of malicious code upon opening the document. The reconstructed PowerShell command appears to be a complex, obfuscated stager designed to download and execute a secondary payload.

Heuristics 8

Hidden UserForm PowerShell EncodedCommand stager critical OLE_USERFORM_OBFUSCATED_POWERSHELL

OLE document contains a UTF-16LE form/property string with an obfuscated PowerShell -EncodedCommand payload. The observed macro family reconstructs this hidden string with Split/Join or UserForm property reads and launches it through WMI/COM process creation. This is downloader malware, not an Office CVE exploit.
ClamAV: Doc.Malware.Emotet-9762672-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Emotet-9762672-0
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` `c7305ccc26d392bb87c692b42d2d6bc38b982a0e4da883514cef9164df30503f`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18576 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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