Office (OLE) / .DOCX malware analysis — malicious · 45397b94d776a372

MALICIOUS

Office (OLE) / .DOCX

176.0 KB Created: 2020-09-28 21:56:00 Authoring application: Microsoft Office Word

MD5: b91daee3a636aa5809b328bcf90ed5c5 SHA-1: 6e500b8ee479feeeef8c4d2c84f9f8e7d7caa2a1 SHA-256: 45397b94d776a37290f1bc5d37f73758d17185070342f0186eb8aa5b031d8e12

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file contains VBA macros, specifically a Document_Open macro that uses CreateObject, indicating an attempt to execute code automatically when the document is opened. This is further supported by the ClamAV detection of 'Doc.Malware.Generic-9769001-0'. The macro's purpose is likely to download and execute a second-stage payload, a common technique for malware delivery. The document body content is obfuscated and does not provide clear user-facing text, so the rationale is based on the macro execution and heuristic findings.

Heuristics 7

ClamAV: Doc.Malware.Generic-9769001-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Generic-9769001-0
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` `fe19635e7383e285d173bce1f5bbd9867258f7974e3830e10aecb187a337391c`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6691 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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