Office (OLE) / .DOCX malware analysis — malicious · 257be5a7bd658161

MALICIOUS

Office (OLE) / .DOCX

213.5 KB Created: 2020-09-21 12:09:00 Authoring application: Microsoft Office Word

MD5: c03862fc41848ff5322d6b17bd03ce8e SHA-1: 32570ec87812f4e58772f3948b5144427d7bcb08 SHA-256: 257be5a7bd65816161022b44a843518eb7bb4a3faff62c17a075e29199e2aa6d

280 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a Microsoft Office document containing a Document_Open VBA macro. This macro utilizes CreateObject and GetObject calls, indicating an attempt to execute arbitrary code. The ClamAV heuristic identifies it as a downloader, and the presence of VBA macros with auto-execution and execution tokens strongly suggests the document's purpose is to download and execute a second-stage payload. No specific family could be identified, but the behavior is consistent with a macro-based downloader.

Heuristics 8

ClamAV: Doc.Downloader.Generic-9764508-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9764508-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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.
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` `cea30dbaa44bcaf57fbcd15c35be69cfffbad74d3b69c3addc059acf5ad797f9`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	19026 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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