Emotet Office (OLE) / .DOCX malware analysis — malicious · 460e772fe33a8f60

MALICIOUS

Office (OLE) / .DOCX

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

MD5: 35bae26c4701d904ffc38871664fa519 SHA-1: 8343981d79a419ebcb0358419202d8404a065bb3 SHA-256: 460e772fe33a8f6054329997f77e044e08d85f72b2cb3c8d122096c879176eb4

240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The critical ClamAV detection and high-severity heuristics for VBA macros, specifically the Document_Open auto-execution and CreateObject calls, strongly indicate a malicious downloader. The presence of a VBA macro in 'macros.bas' and the 'OLE_VBA_PCODE_AUTOEXEC_EXEC' firing confirm that the macro is designed to execute automatically upon opening the document. The document body, though heavily obfuscated, contains patterns suggesting an attempt to disguise an error or warning, likely to lure the user into interacting with the malicious content. The primary function of the macro appears to be downloading and executing a second-stage payload, consistent with Emotet's typical behavior.

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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