Emotet Office (OLE) / .DOC malware analysis — malicious · b907520d11e9210a

MALICIOUS

Office (OLE) / .DOC

95.3 KB Created: 2019-12-18 22:09:00 Authoring application: Microsoft Office Word

MD5: bcc829c0d9089bb6b760218ca2d365b0 SHA-1: 48b64a18f3fdca3bf1a20121b598e5497b6e33f7 SHA-256: b907520d11e9210a0e97fa52ff27487d6a4ecdccacdbb8a2e6e46d68f341c15b

300 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file is a malicious Microsoft Word document containing VBA macros. The critical heuristic 'OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER' indicates the use of a hidden UserForm and VBA code to execute a command stager. This is a common technique used by Emotet for downloading and executing further malicious payloads. The ClamAV detection also strongly suggests Emotet. No specific URLs or network IOCs were extracted, but the presence of the 'macros.bas' file is noted.

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-7464930-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-7464930-0
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` `85646354822f474207c7388c28da3b9b8065405706f8cea7b437443a622dca8a`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	11000 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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