Office (OLE) / .DOCX malware analysis — malicious · eb85d3c422572557

MALICIOUS

Office (OLE) / .DOCX

177.1 KB Created: 2020-09-28 12:01:00 Authoring application: Microsoft Office Word

MD5: f816bf0306480c4aec56238e31f01d2d SHA-1: 89191558becd560e845648a7a085537c698fb57d SHA-256: eb85d3c422572557f51125f1c728dc17d022553a4dd8abee8389115d2323f58b

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that executes upon opening. The presence of CreateObject calls and p-code auto-execution with execution tokens strongly indicates malicious intent. The ClamAV detection as 'Doc.Downloader.Generic' further supports this. The embedded macros.bas file is the primary artifact responsible for the malicious behavior, likely downloading and executing a second-stage payload.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9768640-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9768640-0
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` `41d5da1c3b5ac37936783dc0f6deb9a466b44f4833e7f3cfb69b25cedc4e48ca`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6262 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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