Emotet Office (OLE) malware analysis — malicious · 8214d930ada54705

MALICIOUS

Office (OLE)

155.7 KB Created: 2020-09-14 23:20:00 Authoring application: Microsoft Office Word

MD5: e3d6fa644e06a93a27e6f33630c9b684 SHA-1: a3a7f6094b51c5df781e83d92d7ffb34fbea7603 SHA-256: 8214d930ada54705884a1132006f2f1d5ac2bd3ba8393ee7550133ad561e4dd3

262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The sample is a malicious Office document containing a Document_Open VBA macro. This macro utilizes CreateObject to execute an obfuscated PowerShell stager. The ClamAV detection name 'Doc.Malware.Emotet-9762289-0' strongly suggests the Emotet family. The PowerShell command is encoded and likely downloads a secondary payload.

Heuristics 7

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-9762289-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Emotet-9762289-0
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.
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` `c2c6c828c036fac6100aee871b53e2578aa69d81979ea582439457589bcf0fbb`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18613 bytes

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