Office (OLE) / .DOCX malware analysis — malicious · 29d73c02461e4699

MALICIOUS

Office (OLE) / .DOCX

141.0 KB Created: 2021-01-25 08:47:00 Authoring application: Microsoft Office Word

MD5: 5da228cb9684ce1477931d70fb758b8d SHA-1: 58f9b950785cf236d7c0869a9e1b05879ca38467 SHA-256: 29d73c02461e4699f92d7c7f7df05993376cc1cf1422b6dc501e6d19556434a2

200 Risk Score

Malware Insights

MITRE ATT&CK

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

The critical ClamAV detection and high-severity heuristics for OLE_VBA_MACROS, OLE_VBA_DOCOPEN, and OLE_VBA_PCODE_AUTOEXEC_EXEC indicate the presence of a malicious VBA macro designed to execute automatically when the document is opened. The GetObject call within the Document_Open macro is a common technique for initiating malicious actions, such as downloading and executing further stages. The document body content is heavily obfuscated and appears to be junk data, suggesting the primary malicious functionality resides within the VBA macros.

Heuristics 6

ClamAV: Doc.Malware.Valyria-10034158-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Valyria-10034158-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
GetObject call high OLE_VBA_GETOBJ

GetObject 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.
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` `464ee3baa3fefa153b2db059b50fc0b5f7ab283122dc843cd170391807f2939c`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	8459 bytes

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