Emotet Office (OLE) / .DOCX malware analysis — malicious · 87de984c9ce216b3

MALICIOUS

Office (OLE) / .DOCX

184.7 KB Created: 2020-12-23 07:47:00 Authoring application: Microsoft Office Word

MD5: 4146a2d6ba72c3ebd654f8f091f7ff8c SHA-1: 6ff561a47c79122c3c8e8a4f68f83e1038ceeb57 SHA-256: 87de984c9ce216b3c4c6ca196e51a042d9a5cd438c4968e8ae070b6053106556

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The critical ClamAV detection and high-severity heuristics for VBA macros, including auto-execution and CreateObject calls, strongly indicate a malicious downloader. The presence of a 'Document_Open' macro suggests an attempt to execute malicious code upon opening the document. The extracted document body, though heavily obfuscated, contains patterns that suggest a lure to exploit document expiration or errors, likely to prompt the user to enable macros or download further payloads. The 'macros.bas' artifact is the primary indicator of the malicious script.

Heuristics 7

ClamAV: Doc.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
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` `d5578521430d19d3e1a741e6facd5db8ed236e25c6fc3d692889ddd7a6d225bf`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	8783 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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