Office (OLE) / .DOCX malware analysis — malicious · 731d384432db06af

MALICIOUS

Office (OLE) / .DOCX

231.6 KB Created: 2020-07-31 20:21:00 Authoring application: Microsoft Office Word

MD5: bde2290c679c9cde6a1590f687e13d3b SHA-1: b57fc7bbaa15658c0410a9ef8b0d812ae8799e69 SHA-256: 731d384432db06afe10409f1d8220e78be6975e3186eceb4857ffa54a92ac2f1

262 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains VBA macros, including a Document_Open macro and a hidden UserForm command stager. This mechanism is designed to automatically execute code upon opening the document, likely to download and run a second-stage payload. The ClamAV detection 'Doc.Malware.Lemodldr-9238798-0' further supports its malicious nature.

Heuristics 7

VBA UserForm hidden-property command stager critical OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER

VBA auto-exec macro creates a COM object from a decoded variable and reconstructs command text through Split/Join and hidden UserForm properties such as ControlTipText, Tag, Pages, or HelpContextId. This is a high-confidence macro downloader/loader shape seen in the reviewed OLE set, but it is not an Office CVE exploit primitive.
ClamAV: Doc.Malware.Lemodldr-9238798-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Lemodldr-9238798-0
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` `791871d0af7a691daff6bf64706a93868d14caabf4ae021ac2dfaf9f2eed24e5`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	4964 bytes

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