Office (OLE) / .DOCX malware analysis — malicious · 355499f144efa41f

MALICIOUS

Office (OLE) / .DOCX

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

MD5: a4a09a30b1a8ed03d56a45dc17e3ed95 SHA-1: 41c2ee288189424ee7d5ef6cee7e0d26cdd2229b SHA-256: 355499f144efa41f21d80a9c65951bc118d0198a598fbe5c252c1fe5e64cde9a

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a Microsoft Office document containing VBA macros, specifically a Document_Open macro that is automatically executed. The heuristic firings indicate the use of CreateObject and p-code auto-execution, suggesting the macro attempts to perform malicious actions. While the specific payload is not directly visible, the presence of these indicators strongly suggests a downloader or dropper functionality. The document body content is obfuscated and does not provide clear user-facing text, but the macro execution is the primary indicator of malicious intent.

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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