Office (OLE) / .DOCX malware analysis — malicious · 33c4a2fd6323bb9b

MALICIOUS

Office (OLE) / .DOCX

176.0 KB Created: 2020-09-28 21:56:00 Authoring application: Microsoft Office Word

MD5: f02ae2a543583ad18cbf645b8ebe783c SHA-1: 0b3114481dcde64a64c5e255990e24b26c838c53 SHA-256: 33c4a2fd6323bb9b915d3368cca5015470e2ebe56ac0d7fc33568530acc9fafe

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file contains VBA macros, specifically a Document_Open macro that is automatically executed upon opening the document. This macro uses CreateObject, indicating it likely attempts to perform actions such as downloading and executing a second-stage payload. The ClamAV detection further confirms its malicious nature. The document body content is obfuscated and does not provide clear user-facing text, but the presence of the auto-executing macro is a strong indicator of malicious intent.

Heuristics 7

ClamAV: Doc.Malware.Generic-9769001-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Generic-9769001-0
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` `fe19635e7383e285d173bce1f5bbd9867258f7974e3830e10aecb187a337391c`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6691 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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