Emotet Office (OLE) malware analysis — malicious · 8bcdcd0930116eda

MALICIOUS

Office (OLE)

234.4 KB Created: 2020-08-14 21:43:00 Authoring application: Microsoft Office Word

MD5: 219684141aa3354e8a549a04d097fdc5 SHA-1: 1d30c09b123bc52b8b9c3a5a1596fad2e567a772 SHA-256: 8bcdcd0930116eda30e116f00f3d77e1d072a59c4aaa832e7c4b4c202b9ad77d

300 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The file contains VBA macros, specifically a Document_Open macro that uses CreateObject to execute code. Critical heuristics indicate a hidden UserForm command stager, a common Emotet technique for downloading and executing further payloads. ClamAV detection confirms this as Emotet. The embedded URL is benign, but the macro's behavior is the primary indicator of malicious intent.

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-9348583-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-9348583-0
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` `34c0de223fb155b200470dd74532eb17cc8088993a15437bad69cdda5f3fc0cc`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	7690 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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