Office (OLE) / .DOCX malware analysis — malicious · baea3b49fb6d801e

MALICIOUS

Office (OLE) / .DOCX

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

MD5: 0f1af16a555c0b05226109257ff2f666 SHA-1: 706f98ec1fba00d7467d638c7b5843d36aa8c593 SHA-256: baea3b49fb6d801e340cd96ee95b372c4ec5912b218b05116dcd8fb8a70f96e6

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1059.001 PowerShell

The file is a Microsoft Office document containing a Document_Open VBA macro. This macro utilizes CreateObject and p-code execution, indicating it is designed to run automatically when the document is opened. The presence of the 'macros.bas' artifact and the ClamAV detection as 'Doc.Downloader.Generic' strongly suggest that the macro's purpose is to download and execute a second-stage payload. The document body content is heavily obfuscated and does not provide clear user-facing text, but the macro behavior is indicative of 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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