Office (OLE) / .DOCX malware analysis — malicious · bfdb8171decc8e7a

MALICIOUS

Office (OLE) / .DOCX

206.8 KB Created: 2020-10-28 18:42:00 Authoring application: Microsoft Office Word

MD5: 771e9bb86ebd172899f5f9a954d88226 SHA-1: c513ee9ee1d183efd5d1fd01e974db5da261abe0 SHA-256: bfdb8171decc8e7ad5149341f75743afdb39ade60e09e7afc3d3f8f4daa057bc

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a malicious DOCX document containing a Document_Open VBA macro. This macro utilizes CreateObject to execute code, a common technique for downloading and running secondary payloads. The ClamAV detection as 'Doc.Downloader.Generic' further supports this. The embedded URL was confirmed benign, but the macro's auto-execution and use of CreateObject strongly indicate a downloader functionality.

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` `e949db65d47346cd391eb9bc49c66a713688cfea31c7cb788a6d1dce1ea9efc6`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18584 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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