Emotet Office (OLE) / .DOC malware analysis — malicious · 25941d1dac273e94

MALICIOUS

Office (OLE) / .DOC

192.0 KB Created: 2020-07-17 19:04:00 Authoring application: Microsoft Office Word

MD5: 10127152f4dc273b931eb4c65c7e9814 SHA-1: b6d25f28307ded8898e48584018e10fbbc317465 SHA-256: 25941d1dac273e9438afe0bf0b3a913474ff21b6c559c8f9c5a1820eac5e6281

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 VBA macros, specifically a Document_Open macro that utilizes a hidden UserForm to execute commands. This technique, combined with the ClamAV detection of 'Doc.Downloader.Emotet-10022426-0', strongly suggests Emotet activity. The hidden UserForm command stager is designed to download and execute a secondary payload, which is a common Emotet delivery mechanism.

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-10022426-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-10022426-0
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` `b5eedf2d36ffff3d5158395562fd8ccf88a6a22804bbfa31a9f9e606b85242b8`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	71641 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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