Office (OLE) / .DOCX malware analysis — malicious · debda494b0bad3be

MALICIOUS

Office (OLE) / .DOCX

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

MD5: 1114a092f537ee895623e0cef4f61525 SHA-1: 5420f66f63f8eed38ad45d2c5812c2731c00cf69 SHA-256: debda494b0bad3be7b136c399dc6d16f1aa643cc3611c5fa3ffc9a4d32d2c808

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The critical ClamAV detection and high-severity heuristics for VBA macros, specifically the Document_Open auto-execution and CreateObject calls, indicate a downloader. The presence of a VBA macro in the 'macros.bas' file, combined with the auto-execution heuristic, strongly suggests that the macro is designed to run automatically upon opening the document. The document body, though heavily obfuscated, contains patterns that suggest a lure related to document expiration or errors, likely intended to prompt the user to enable macros. The primary function appears to be downloading and executing a second-stage payload.

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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