Office (OLE) / .DOCX malware analysis — malicious · 8de922c73adca515

MALICIOUS

Office (OLE) / .DOCX

195.5 KB Created: 2020-09-18 21:15:00 Authoring application: Microsoft Office Word

MD5: 64a081ceb7397e47639c94ca52181da8 SHA-1: 1a7018c10ddf5ae333e279833c8b74f960262405 SHA-256: 8de922c73adca515635e350e8e59e9e2470d9baab56386d9e8f3b3f9b6bfb701

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file is a Microsoft Office document containing a Document_Open VBA macro. This macro utilizes CreateObject and p-code auto-execution, indicating it is designed to run automatically when the document is opened. The presence of the 'macros.bas' artifact and the ClamAV detection 'Doc.Downloader.Generic-9763611-0' strongly suggest that this macro's primary function is to download and execute a secondary payload. No specific family could be identified, but the behavior is consistent with a downloader.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9763611-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9763611-0
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` `27aa07f405fa9b3280133cc26ba8fa4c11df7235c7ef1a37f33a0286291c2144`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	19156 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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