Office (OLE) / .DOCX malware analysis — malicious · 343a9444d82311b3

MALICIOUS

Office (OLE) / .DOCX

169.5 KB Created: 2021-01-22 16:11:00 Authoring application: Microsoft Office Word

MD5: ea12f31a7730b22b7f83c3c39e16c2f6 SHA-1: e71ed345eb9b7b6a5ed29121f4ae279abe15a79f SHA-256: 343a9444d82311b35e225e7f819846eb81890d285f051585d33692e2d78fb73a

202 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file contains VBA macros, specifically a Document_Open macro, which is a common technique for executing malicious code upon opening a document. The presence of CreateObject calls and p-code auto-execution further indicates malicious intent. The ClamAV detection 'Doc.Malware.Emodldr-10033990-0' strongly suggests this is a known malware downloader. The VBA script is heavily obfuscated, but its structure and the heuristics indicate it's designed to run code, likely to fetch and execute a second-stage payload.

Heuristics 6

ClamAV: Doc.Malware.Emodldr-10033990-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Emodldr-10033990-0
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.
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` `5ed4257a756cf59fd0bdd4996a568d11e210a8cb1fd2c78a16a7c0bd2a73f2f9`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	16688 bytes

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