Office (OLE) / .DOCX malware analysis — malicious · ef86cfd4dc7f1ba7

MALICIOUS

Office (OLE) / .DOCX

265.0 KB Created: 2020-10-28 13:40:00 Authoring application: Microsoft Office Word

MD5: bebec6a3c8ced768046ea85194f7d88b SHA-1: 788b9f157fc3802cebf6391bc99b933b10952b1c SHA-256: ef86cfd4dc7f1ba70d0a43c30196760f4cadd46ab5d7e63723c0d11ef39e01ca

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a Microsoft Word document with a high-confidence detection for VBA macros, specifically a Document_Open auto-execution macro. This macro utilizes CreateObject, indicating it's designed to perform actions beyond typical document processing. The ClamAV detection as 'Doc.Downloader.Generic' strongly suggests the macro's purpose is to download and execute a second-stage payload. No specific family could be identified, but the behavior is consistent with a downloader.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9785156-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9785156-0
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` `04f0b14197f396c9b03f7b934599b1b01d62a486cd3090375b867094895917c9`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18531 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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