Office (OLE) / .DOCX malware analysis — malicious · d14723eb50af0341

MALICIOUS

Office (OLE) / .DOCX

234.8 KB Created: 2020-10-28 21:52:00 Authoring application: Microsoft Office Word

MD5: 286fd2129800b1ddbb557e7d14b81307 SHA-1: 929e837d5d04c2faf810972de2507a3a8fb3270c SHA-256: d14723eb50af0341b72c28a3c747940042ecd0795e40dd42a5a85ab0ac49ba7f

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a Microsoft Office document containing a Document_Open VBA macro that utilizes CreateObject to execute arbitrary code. This is strongly indicative of a downloader or droppper malware. The ClamAV heuristic further confirms its malicious nature, classifying it as Doc.Downloader.Generic. No specific family could be identified, but the execution of VBA macros via the Document_Open auto-exec is a common initial access technique.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9785156-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9785156-0
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` `5aa3aad97a35a46de04017100e8aadce01daec323c971d220dcadfd4335841c1`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18882 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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