Office (OLE) / .DOCX malware analysis — malicious · 4da7b86975d7a29b

MALICIOUS

Office (OLE) / .DOCX

151.1 KB Created: 2020-09-24 10:05:00 Authoring application: Microsoft Office Word

MD5: a9d1670d4dc87980cc43a4fc63fe2db9 SHA-1: 14bd7b17929692553120d65eb7020b1055a7a68e SHA-256: 4da7b86975d7a29be7c1f9dfc46eb1463388e66694d9df0ef78ee14549c145c3

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.005 Visual Basic

The file contains VBA macros, specifically a Document_Open macro, which is designed to execute automatically upon opening the document. Heuristics indicate the use of CreateObject and p-code auto-execution, strongly suggesting malicious intent. The extracted document body, though heavily obfuscated, appears to be an attempt to disguise a PowerShell command. The presence of the 'macros.bas' artifact further confirms the macro-based nature of this threat. The primary attack vector is likely macro execution leading to a second-stage download and execution.

Heuristics 7

ClamAV: Doc.Trojan.Agent-9765752-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Agent-9765752-0
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` `b39e572cf96864edb4f5c39daa3a8388f74111156690860ca53002be67bbf3ff`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	20583 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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