Office (OLE) / .DOCX malware analysis — malicious · 7da90a568b11f561

MALICIOUS

Office (OLE) / .DOCX

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

MD5: 7438618ccb0fbad2259b0153c3e3bedb SHA-1: f27805b4f489574777f85343eaa868240e47c62d SHA-256: 7da90a568b11f5619217fc3f607646d3fba7a56ef64303b2ab72b8751d9308fc

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is a Microsoft Office document with a high-confidence detection for VBA macros, specifically triggering on the Document_Open auto-execution event and CreateObject calls. This indicates the macros are designed to run automatically when the document is opened. The ClamAV detection as 'Doc.Downloader.Generic' further supports the conclusion that this document is a downloader. The embedded URL, though benign, is noted as present in the document text. The primary attack pattern involves leveraging VBA to initiate a download of further malicious content.

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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