Emotet Office (OLE) / .DOCX malware analysis — malicious · 3bd3eb3c50b2b826

MALICIOUS

Office (OLE) / .DOCX

162.2 KB Created: 2020-09-15 22:30:00 Authoring application: Microsoft Office Word

MD5: 1f8b01448f448b4677cd6e60c46f31d6 SHA-1: c745184db5269fd492f1c8b238ff145d54f19607 SHA-256: 3bd3eb3c50b2b826fd6d913c3aa2cda719ec225dde6dacebe3299547b35e3aa6

300 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The file contains VBA macros, including a Document_Open auto-exec macro, which is a common delivery mechanism for Emotet. The heuristics indicate an obfuscated PowerShell stager is present, likely responsible for downloading and executing a second-stage payload. The ClamAV detection explicitly names Emotet. No document body text was available for analysis, but the presence of macros and the specific heuristic firings strongly suggest malicious intent.

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.Downloader.Emotet-9762299-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-9762299-0
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` `552d784ab69156220ac353b18611d326284a0fac1bed1acb2f14ae222ef14256`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	25576 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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