Emotet Office (OLE) / .DOC malware analysis — malicious · a47aa1786caf69f8

MALICIOUS

Office (OLE) / .DOC

266.9 KB Created: 2020-02-06 14:03:00 Authoring application: Microsoft Office Word

MD5: 5be5eeca74a90c8bb032a2f86cea13fc SHA-1: 4d06687357ac3f695ebbe8e433c4d90f3535feb9 SHA-256: a47aa1786caf69f89cc86ae14b1c6e7e123334e22dc7bc62672ec69e58eb33bb

300 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The file is identified as malicious by ClamAV with the signature 'Doc.Malware.Emotet-7580127-0', strongly indicating the Emotet family. Critical heuristics indicate the presence of a VBA UserForm hidden-property command stager designed for auto-execution, specifically involving a `CreateObject` call and a `Document_Open` macro. This suggests the document is designed to immediately run malicious code upon opening, likely to download and execute a second-stage payload.

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.Malware.Emotet-7580127-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Emotet-7580127-0
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` `fc84e85f076ca82c510bbed6f386916996c448d436e24206bc8aaa52b3f987e0`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	37872 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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