Emotet Office (OLE) / .DOCX malware analysis — malicious · a5ec0183417bd80b

MALICIOUS

Office (OLE) / .DOCX

196.9 KB Created: 2020-07-17 13:04:00 Authoring application: Microsoft Office Word

MD5: 3fbbf63b4d3d9de4b4ea5d55eff60d88 SHA-1: 7f696d46a88a007394b229db1e0f9bba69c24407 SHA-256: a5ec0183417bd80bfbce532c52034802596778ee443ecd421be07fdf47b3a516

300 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1505.003 Server Software Component: User Interface T1059.001 PowerShell

The sample was detected by ClamAV as 'Doc.Downloader.Emotet-10022426-0', strongly indicating the Emotet family. Critical heuristics indicate a VBA UserForm hidden-property command stager, which is a known Emotet delivery technique. This stager likely downloads and executes a second-stage payload, consistent with Emotet's behavior as a downloader.

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` `dab73d37303ed09b6b937371b3ecb40f868b32496f208fe90cafb3934ccc13d0`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	66489 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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